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Posts Tagged ‘Surgery MCQs’

Trauma MCQs & Notes

Posted by Dr KAMAL DEEP on June 3, 2011

BLUNT TRAUMA ABDOMEN

image

Blunt abdominal trauma initially is evaluated by FAST examination in most major trauma centers, and this has largely supplanted DPL .FAST is not 100% sensitive, however, so diagnostic peritoneal aspiration is still advocated in hemodynamically unstable patients without a defined source of blood loss to rule out abdominal hemorrhage FAST is used to identify free intraperitoneal fluid in Morison’s pouch, the left upper quadrant, and the pelvis. Although this method is exquisitely sensitive for detecting intraperitoneal fluid of >250 mL, it does not reliably determine the source of hemorrhage nor grade solid organ injuries.28,29 Patients with fluid on FAST examination, considered a “positive FAST,” who do not have immediate indications for laparotomy and are hemodynamically stable undergo CT scanning to quantify their injuries. Injury grading using the American Association for the Surgery of Trauma grading scale is a key component of nonoperative management of solid organ injuries. Additional findings that should be noted on CT scan in patients with solid organ injury include contrast extravasation (i.e., a “blush”), the amount of intra-abdominal hemorrhage, and presence of pseudoaneurysms . CT also is indicated for hemodynamically stable patients for whom the physical examination is unreliable. Despite the increasing diagnostic accuracy of multislice CT scanners, CT still has limited sensitivity for identification of intestinal injuries. Bowel injury is suggested by findings of thickened bowel wall, “streaking” in the mesentery, free fluid without associated solid organ injury, or free intraperitoneal air.30 Patients with free intra-abdominal fluid without solid organ injury are closely monitored for evolving signs of peritonitis; if patients have a significant closed head injury or cannot be serially examined, DPL should be performed to exclude bowel injury

Blunt injuries to the abdomen – (JIPMER 82,80)
a)May cause peritonitis
b)Rarely need urgent laparotomy
c)May cause intestinal obstruction
d)May cause gastroduodenal ulceration

Blunt trauma secondary to motor vehicle accidents, motorcycle accidents, falls, assaults, and striking of pedestrians remains the most frequent mechanism of abdominal injury. Penetrating abdominal wounds are usually caused by either gunshot or stab wounds and by a significantly smaller number of shotgun wounds.

Based on the high frequency of intra-abdominal organ injury after gunshot wounds, mandatory abdominal exploration, with the rare exception of tangential and superficial wound trajectories restricted to the right upper quadrant, remains the standard form of management. Stab wounds to the abdomen, however, carry a significantly lower risk of intra-abdominal organ injury than do gunshot wounds, and several studies have recently favored a more selective approach, as opposed to mandatory exploratory laparotomy.

The impetus for nonoperative management of solid organ injury in stable blunt trauma patients has expanded to penetrating trauma as well. With improved imaging, more stable patients sustaining a single solid organ injury after stab and gunshot wounds to the abdomen will be treated conservatively.

The diagnostic approach differs for penetrating trauma and blunt abdominal trauma. As a rule, minimal evaluation is required before laparotomy for gunshot or shotgun wounds that penetrate the peritoneal cavity, because over 90% of patients have significant internal injuries.

In contrast to gunshot wounds, stab wounds that penetrate the peritoneal cavity are less likely to injure intra-abdominal organs.

Blunt abdominal trauma initially is evaluated by FAST examination in most major trauma centers, and this has largely supplanted DPL . FAST is not 100% sensitive, however, so diagnostic peritoneal aspiration is still advocated in hemodynamically unstable patients without a defined source of blood loss to rule out abdominal hemorrhage

Hemodynamically stable patients sustaining blunt trauma are adequately evaluated by abdominal ultrasound or CT, unless other severe injuries take priority and the patient needs to go to the operating room before the objective abdominal evaluation. In such instances, DPL or focused abdominal sonography for trauma (FAST) is usually performed in the operating room to rule out intra-abdominal bleeding requiring immediate surgical exploration.

Hemodynamically stable blunt trauma patients are evaluated by ultrasound in the resuscitation room, if available, or by DPL to rule out intra-abdominal injuries as the source of blood loss and hypotension.

Hypotensive patients with isolated penetrating abdominal trauma who are hypotensive or in shock or have peritoneal signs should go to the operating room despite the mechanism of injury. Stab wound victims without peritoneal signs, evisceration, or hypotension benefit from wound exploration and DPL. Gunshot wound victims should generally undergo exploration

MC abdominal organ injured in blunt trauma abdomen is – (PGI 99)
a) Spleen b) Liver
c) Pancreas d) Stomach

The spleen is the intra-abdominal organ most frequently injured in blunt trauma. Suspicion of a splenic injury should be raised in any patient with blunt abdominal trauma. History of a blow, fall, or sports-related injury to the left side of the chest, flank, or left upper part of the abdomen is usually associated with splenic injury. The diagnosis is confirmed by abdominal CT in a hemodynamically stable patient or during exploratory laparotomy in an unstable patient with positive DPL findings.

The small bowel is the most frequently injured organ after penetrating injuries.The colon is the second most frequently injured organ after gunshot wounds and the third after stab wounds to the abdomen.

Suspicion of a splenic injury should be raised in any patient with blunt abdominal trauma.

More than 70% of all stable patients are currently being treated by means of a nonoperative approach. The classic criteria for nonoperative treatment include hemodynamic stability, negative abdominal examination, absence of contrast extravasation on CT, absence of other clear indications for exploratory laparotomy or associated injuries requiring surgical intervention, absence of associated health conditions that carry an increased risk for bleeding (coagulopathy, hepatic failure, use of anticoagulants, specific coagulation factor deficiency), and injury grade I to III.

Recent series have also indicated that nonoperative management should be performed in patients older than 55 years, those with a large hemoperitoneum, and patients with injury grades IV and V, which in the past have been relative contraindications.

Splenectomy is indicated for hilar injuries, pulverized splenic parenchyma, or any injury of grade II or higher in a patient with coagulopathy or multiple injuries. The authors use autotransplantation of splenic implants to achieve partial immunocompetence in younger patients.Drains are not used. Partial splenectomy can be employed in patients in whom only the superior or inferior pole has been injured. Hemorrhage from the raw splenic edge is controlled with horizontal mattress sutures, with gentle compression of the parenchyma.As in repair of hepatic injuries, in splenorrhaphy hemostasis is achieved by topical methods (electrocautery; argon beam coagulation; application of thrombin-soaked gelatin foam sponges, fibrin glue, or BioGlue), envelopment of the injured spleen in absorbable mesh, and pledgeted suture repair.

Postsplenectomy sepsis is caused by encapsulated bacteria, Streptococcus pneumoniae, Haemophilus influenzae, and Neisseria meningitidis, which are resistant to antimicrobial treatment. In patients undergoing splenectomy, prophylaxis against these bacteria is provided via vaccines administered optimally at 14 days.

Table 20-11 Spleen Injury Scale (1994 Revision)
GRADE[*] TYPE OF INJURY DESCRIPTION OF INJURY
I Hematoma Subcapsular, <10% surface area
Laceration Capsular tear, <1 cm in parenchymal depth
II Hematoma Subcapsular, 10%-50% surface area; intraparenchymal, <5 cm in diameter
Laceration Capsular tear, 1-3 cm in parenchymal depth and not involving a trabecular vessel
III Hematoma Subcapsular, >50% surface area or expanding, ruptured subcapsular or parenchymal hematoma; intraparenchymal hematoma, ≥5 cm or expanding
Laceration >3 cm in parenchymal depth or involving the trabecular vessels
IV Laceration Laceration involving the segmental or hilar vessels and producing major devascularization (>25% of spleen)
V Laceration Completely shattered spleen
Vascular Hilar vascular injury that devascularizes the spleen
From Moore EE, Cogbill TH, Jurkovich GJ, et al: Organ injury scaling: Spleen and liver (1994 revision). J Trauma 38:323-324, 1995
* Advance one grade for multiple injuries up to grade III.

Investigation of choice for blunt trauma abdomen in unstable patient – (PGI 2000)
a) X-ray abdomen b) USG
c) Diagnostic Peritoneal lavage d) MRI e) CT scan

A 30 year old female comes with hypovolemic shock after blunt trauma of the abdomen. An emergency USG of abdomen shows splenic tear. Which of the following is to be done – (PGI 01)
a)CECT of the abdomen
b)Diagnostic lavage of peritoneal cavity before proceeding
c)Monitor patient to assess for progression
d)Immediate surgery
e)Chest X-ray

Commonly injured in blunt abdominal injury is – (PGI 01)
a) Midileum b) Prox. jejunum
c) Midjejnum d) Distal ileum e) Ileocecal junction

The postulated mechanisms involved in blunt intestinal injury include the following:

1.Crushing injury of the bowel between the vertebral bodies and the blunt object, such as a steering wheel or handlebars

2Deceleration shearing of the small bowel at fixed points, such as the ligament of Treitz and the ileocecal valve and around the mesenteric artery

3.Closed-loop rupture caused by a sudden increase in intra-abdominal pressure

Preferred incision for abdominal exploration in Blunt injury abdomen is – (AI 07)
a)Always Midline incision
b)Depending upon the organ
c)Transverse incision
d)Paramedian

Emergent Abdominal Exploration

Abdominal exploration in adults is performed using a generous midline incision because of its versatility. For children under the age of 6, a transverse incision may be advantageous. Making the incision is faster with a scalpel than with an electrosurgical unit; incisional abdominal wall bleeding should be ignored until intra-abdominal sources of hemorrhage are controlled. Liquid and clotted blood is evacuated with multiple laparotomy pads and suction to identify the major source(s) of active bleeding. After blunt trauma the spleen and liver should be palpated and packed if fractured, and the infracolic mesentery inspected to exclude injury. In contrast, after a penetrating wound the search for bleeding should pursue the trajectory of the penetrating device. If the patient has an SBP of <70 mmHg when the abdomen is opened, digital pressure or a clamp should be placed on the aorta at the diaphragmatic hiatus. After the source of hemorrhage is localized, direct digital occlusion (vascular injury) or laparotomy pad packing (solid organ injury) is used to control bleeding .If the liver is the source in a hemodynamically unstable patient, additional control of bleeding is obtained by clamping the hepatic pedicle (Pringle maneuver) .Similarly, clamping the splenic hilum may more effectively control bleeding than packing alone. When the spleen is mobilized, it should be gently rotated medially to expose the lateral peritoneum; this peritoneum and endoabdominal fascia are incised, which allows blunt dissection of the spleen and pancreas as a composite from the retroperitoneum .

image

Pringle

The four points of probe placement in Focused Abdominal Sonogram for trauma (FAST) in blunt thoraco-abdominal trauma are – (Karnataka 04)
a) Epigastrium (R) hypochondrium, (L) Lower chest, hypogastrium
b) Epigastrium, (R) and (L) Hypochondria, (R) Iliac fossa
c) Epigastrium, (R) and (L) Lumbar regions, hypogastrium
d) Hypogastrium (R) and (L) Lumbar regions, (R) lower chest

True in Pancreas trauma – (PGI June 06)
a)Solitary involvement common
b)Blunt injury usual cause
c)Always surgery needed
d)Amylase increase
in 90% cases
e)HRCT is investigation of choice

Pancreatic injury is rare and accounts for approximately 10% to 12% of all abdominal injuries. The great majority of such injuries are caused by penetrating mechanisms and are often associated with significant injuries involv-ing other intra-abdominal organs. Blunt trauma to the abdomen caused by a direct blow or seat belt injury may compress the pancreas over the vertebral column and result in pancreatic disruption. Major abdominal vascular injuries are present in more than 75% of cases of penetrating pancreatic trauma, and injuries to solid organs and hollow viscera are common after blunt trauma.

Increased levels of serum and urinary amylase after a blunt injury are not diagnostic, but a persistent elevation suggests pancreatic injury. Contrast-enhanced duodenography may reveal widening of the C-loop. DPL is not sensitive enough for the diagnosis of retroperitoneal injuries, but this test may be positive because of the high frequency of associated injures and should prompt abdominal exploration. Abdominal CT is of potential value, but its role is still unclear. The diagnosis of a pancreatic injury with the use of newer-generation CT scanners has improved significantly; however, some injuries may be identified only during follow-up scans obtained because of changes in clinical status

Isolated pancreatic injuries are rare.

The most frequent complications after pancreatic trauma are pancreatic fistula and peripancreatic abscess. These complications occur in approximately 35% to 40% of patients sustaining pancreatic injuries. Pancreatic fistulas, if well drained, will close spontaneously in the majority of patient

In Renal injury following blunt injury to abdomen which is not done – (AIIMS 92)
a)Prophylactic nephrectomy
b)Diagnostic peritoneal lavage
c)IVP
d)Exploratory laparotomy

Forty eight hours after sustaining a blunt abdominal injury, a 15 year old boy presents with hematuria and pain in the left side of abdomen. On examination, he has a pulse rate of 96/minute with a BP of 110/70 mmHg. His Hb is 10-8 gm% with a PCV of 31%. The blood urea is 32 mg%. Abdominal examination revealed tenderness in left lumbar region but no palpable mass. The most appropriate investigation to diagnose and find the extent of renal injury would be –
a)Sonographic evaluation of abdomen (UPSC 05)
b)Intravenous pyelography
c)Contrast enhanced computed tomography
d)MR urography

Cullen’s sign in seen in – (Kerala 94)
a)Acute cholecystitis
b)Acute pancreatitis
c)acute haemorrhagic pancreatitis
d)Blunt injury abdomen

Best diagnostic aid in blunt trauma abdomen is –
a)CT scan (AIIMS 87)
b)4 quadrant aspiration
c)Pertioneeal lavage
d)Ultrasound

Commonest cause of hemobilia is – (JIMPER 92)
a) Gall stones b) Trauma
c) Cholangitis d) Hepatoma

Hemobilia is defined as bleeding into the biliary tree from an abnormal communication between a blood vessel and bile duct. It is a rare condition that is often difficult to distinguish from common causes of gastrointestinal bleeding. The most common causes of hemobilia in modern times are iatrogenic trauma, accidental trauma, gall-stones, tumors, inflammatory disorders, and vascular disorders.

Portal venous bleeding into the biliary tree is rare, minor, and self-limited unless the portal pressure is elevated. Arterial hemobilia, the most common source, can be dramatic, however. Clinical sequelae of hemobilia are related to blood loss and the formation of potentially occlusive blood clots in the biliary tree. The classic triad of symptoms and signs of hemobilia are upper abdominal pain, upper gastrointestinal hemorrhage, and jaundice.

When hemobilia is suspected, the first evaluation is upper gastrointestinal endoscopy, which rules out other sources of hemorrhage and may visualize bleeding from the ampulla of Vater. Upper endoscopy is only diagnostic of hemobilia in about 10% of cases, however. If upper endoscopy is diagnostic and conservative management is planned, no further studies are necessary. Ultrasound or CT may be helpful in demonstrating intrahepatic tumor or hematoma. Evidence of active bleeding into the biliary tree may be seen on contrast-enhanced CT in the form of pooling contrast, intraluminal clots, or biliary dilation. CT may also show risk factors associated with hemobilia, such as cavitating central lesions and aneurysms. Arterial angiography is now recognized as the test of choice when significant hemobilia is suspected and will reveal the source of bleeding in about 90% of cases. Cholangiography demonstrates blood clots in the biliary tree, which may appear as stringy defects or smaller spherical defects. The latter may be difficult to distinguish from stones.

 

In India, Splenectomy is most commonly performed
for – (AIIMS 92)
a) Hydatid cyst b) Carcinoma thyroid
c) Trauma d) Portal hypertension

Which of the following statements related to gastric injury is not true? AI2007
A.Mostly related to penetrating trauma
B.Treatment is simple debridement and suturing
C.Blood in stomach is always related to gastric injury
D.Heals well and fast

Sabiston:- Gastric injuries often result from penetrating trauma. Less than 1% of such wounds are due to blunt trauma secondary to motor vehicle accidents, falls, cardiopulmonary resuscitation, or interpersonal violence.

Most penetrating wounds are treated by débridement of the wound edges and primary closure in layers. Injuries with major tissue loss may best be treated by gastric resection.

During initial evaluation a nasogastric tube should be inserted, and if the aspirate is positive for blood, injury to the stomach should be suspected.

Ten days after a splenectomy for blunt abdominal trauma, a 23-year-old man complains of upper abdominal and lower chest pain exacerbated by deep breathing. He is anorectic but ambulatory and otherwise making satisfactory progress. On physical examination , his temperature is 38.2°C(108°C)rectally, and he has decreased breath sounds at the left lung base. His abdominal wound appears to be healing well, bowel sound are active and there are no perito-neal signs. Rectal examination is negative. The W.B.C. count is 12,500 mm3with a shift to left. Chest X-rays show platelike atelectasis of the left lung field. Abdominal X-rays show a nonspecific gas pattern in the bowel and an air-fluid level in the left upper quadrant. Serum amylase is 150 Somogyi units dl (normal 60 to 80). The most likely diagnosis is AI 2002
A.Subphrenic abscess
B.Pancreatitis
C.Pulmonary embolism
D.Subfascial wound infection

It has been noted that splenic absence provides a relative dead space in the left upper quadrant, which often becomes occupied with blood clot or serum, creating a potential for subphrenic abscess.

A case of blunt trauma is brought to the emergency, in a state of shock; he is not responding to IV crystal-loids; next step in his management would be: AI 2001
A.Immediate laparotomy
B.Blood transfusion
C.Albumin transfusion
D.Abdominal compression

Which of the following is true about renal trauma AI1995
A.Urgent IVP is indicated
B.Exploration of the kidney to be done in all cases
C.Lumbar approach to kidney is preferred
D.Renal artery aneurysm is common

The workup of patients with suspected urinary tract injuries depends on hemodynamic status. Patients sustaining penetrating abdominal injuries requiring immediate exploratory laparotomy may undergo one-shot IVP. Victims of blunt trauma with blood at the urethral meatus should undergo urethrocystography to rule out the presence of a urethral injury before bladder catheterization.Once urethral injury has been ruled out, cystography is performed by injecting 250 to 300 mL of contrast medium through the Foley catheter to maximally distend the bladder. Films should be obtained after full distention and after emptying the bladder. This postvoid film is important to identify posterior extravasation of contrast that is not seen on AP films obtained when the bladder is maximally distended Patients with pelvic fractures involving the anterior arch are particularly likely to have an associated bladder injury

A patient sustained Traumatic injury to major abdominal vessels. It has been planned to explore the
Suprarenal Aorta, the Caeliac Axis, the Superior Mesentric Artery, and the Left Renal Artery. What maneuvre for exposure is recommended: AI2007
A.Cranial visceral Rotation
B.Caudal visceral Rotation
C.Left Medial Visceral Rotation
D.Right Medical Visceral Rotation

image

A left medial visceral rotation is used to expose the abdominal aorta.

image

A right medial visceral rotation is used to expose the infrahepatic vena cava.

 

 

image

FAST Examination

Focused assessment of the sonographic examination of the trauma patient (FAST) is a rapid diagnostic examination to assess patients with potential thoracoabdominal injuries. The test sequentially surveys for the presence or absence of blood in the pericardial sac and dependent abdominal regions, including the right upper quadrant (RUQ), left upper quadrant (LUQ), and pelvis. Surgeons perform FAST during the American College of Surgeons’ advanced trauma life support (ATLS) secondary survey. Although minimal patient preparation is needed, a full urinary bladder is ideal to provide an acoustic window for visualization of blood in the pelvis.

FAST is designed to assess fluid accumulation (presumed to be blood) in dependent areas of the pericardial sac and abdomen while the patient is in the supine position. It is important to note that FAST needs to be performed in a specific sequence. The pericardial area is visualized first so that blood within the heart can be used as a standard to set the gain. Most modern US machines have presets so that gain does not need to be reset each time that the machine is turned on. Periodically, however, especially if multiple types of examinations are performed with different transducers, gain needs to be checked to make sure that intracardiac blood appears anechoic. This maneuver ensures that hemoperitoneum will also appear anechoic and will therefore be readily detected on the US image. The abdominal part of FAST begins with a survey of the RUQ, which is the location within the peritoneal cavity where blood most often accumulates and is therefore readily detected with FAST. Investigators from four level I trauma centers examined true-positive US images of 275 patients who sustained either blunt (220 patients) or penetrating (55 patients) injuries. They found that regardless of the injured organ (with the exception of patients who had an isolated perforated viscus), blood was most often identified on the RUQ image of FAST.This can be a time-saving measure because when hemoperitoneum is identified on a FAST examination in a hemodynamically unstable patient, that image alone, in combination with the patient’s clinical picture, is sufficient to justify an immediate abdominal operation

The technique of performing FAST is well documented. US transmission gel is applied to four areas of the thoracoabdomen, and the examination is conducted in the following sequence: pericardial area, RUQ, LUQ, and pelvis ( Fig. 13-3 ). A 3.5-MHz convex transducer is oriented for sagittal views and positioned in the subxiphoid region to identify the heart and examine for blood in the pericardial sac. Normal and abnormal views of the pericardial area are shown in Figure 13-4 . The subcostal image is not usually difficult to obtain, but a severe chest wall injury, a very narrow subcostal area, subcutaneous emphysema, or morbid obesity can prevent a satisfactory examination. Both of the latter conditions are associated with poor imaging because air and fat reflect the wave too strongly and prevent penetration into the target organ. If the subcostal pericardial image cannot be obtained or is suboptimal, a parasternal US view of the heart is performed.

30 year old person met with a roadside accident.On admision his pulse rate was 120/minute, BP was 100/60 mmHg.Ultrasonagraphy examination revealed laceration of the lower pole of spleen and haemoperitoneum. He was resuscitated with blood and fluid. Two hours later, his pulse was 84/minute and BP was 120/70 mm Hg. The most appropriate course of management in this case would be-(ICS 98)
a)Exploring the patient followed by splenectomy
b)Exploring the patient followed by excusion of the lower pole of spleen
c)Splenorrhaphy
d)Continuation of conservatve treatment under close monitoring system and subsquent surgery if further inficated

Ultrasound.

It can be done expeditiously and is as accurate as DPL in detecting hemoperitoneum. It can also evaluate the liver and the spleen once free fluid is identified; however, this is not its main purpose. Portable machines can be used in the resuscitation area or in the emergency department in a hemodynamically unstable patient without delaying the resuscitation. Another advantage of ultrasound over DPL is its noninvasiveness. No further workup is necessary after a negative ultrasound in a stable patient. CT of the abdomen usually follows positive ultrasound findings in a stable patient. The advantages and disadvantages of abdominal ultrasound are listed in Box 20-3 . Its sensitivity ranges from 85% to 99% and its specificity from 97% to 100%.

Advantages and Disadvantages of Ultrasound
Advantages

Noninvasive
Does not require radiation
Useful in the resuscitation room or emergency department
Can be repeated
Used during initial evaluation
Low cost

Disadvantages

Examiner dependent
Obesity
Gas interposition
Lower sensitivity for free fluid <500 mL
False-negatives: Retroperitoneal and hollow viscus injuries

Abdominal Computed Tomography

CT is the most frequently used method to evaluate a stable blunt abdominal trauma patient. The retroperitoneum is best evaluated by CT. The indications and contraindications for abdominal CT are listed in Box 20-4 . The drawback of CT is the need to transport the patient to the radiology department.CT also evaluates solid organ injury, and in a stable patient with positive ultrasound findings, it is indicated to grade organ injury and to evaluate contrast extravasation. If contrast extravasation is seen, even with minor hepatic or splenic injuries, exploratory laparotomy or, more recently, angiography and embolization are indicated. Another indication for CT is in the evaluation of patients with solid organ injuries initially treated nonoperatively who have a falling hematocrit. The most important disadvantage of CT is its inability to reliably diagnose hollow viscus injury ( Box 20-5 ). Usually, the presence of free abdominal fluid on CT without solid organ injury should raise suspicion for mesenteric, intestinal, or bladder injury, and exploratory laparotomy is often warranted.

Indications and Contraindications for Abdominal Computed Tomography
Indications

Blunt trauma
Hemodynamic stability
Normal or unreliable physical examination
Mechanism: Duodenal and pancreatic trauma

Contraindications

Clear indication for exploratory laparotomy
Hemodynamic instability
Agitation
Allergy to contrast media

 

Advantages and Disadvantages of Abdominal Computed Tomography
Advantages

Adequate assessment of the retroperitoneum
Nonoperative management of solid organ injuries
Assessment of renal perfusion
Noninvasive
High specificity

Disadvantages

Specialized personnel
Hardware
Duration: Helical versus conventional
Hollow viscus injuries
Cost

 

One of the most intriguing problems regarding the objective evaluation of blunt abdominal trauma by CT is what to do when free fluid without signs of solid organ or mesenteric injury is found

Diagnostic Peritoneal Lavage

DPL is a rapid and accurate test used to identify intra-abdominal injuries after blunt trauma in a hypotensive or unresponsive patient without obvious indication for abdominal exploration. Standard criteria for positive DPL findings in blunt trauma include aspiration of at least 10 mL of gross blood, a bloody lavage effluent, a red blood cell count greater than 100,000/mm3, a white blood cell count greater than 500/mm3, amylase level greater than 175 IU/dL, or detection of bile, bacteria, or food fibers. The indications and contraindications for DPL are listed in Box 20-2 . DPL is highly sensitive to the presence of intraperitoneal blood; however, its specificity is low, and because positive DPL findings prompt surgical exploration, a significant number of explorations will be nontherapeutic.

Box 20-2

Indications and Contraindications for Diagnostic Peritoneal Lavage
Indications

Equivocal physical examination
Unexplained shock or hypotension
Altered sensorium (closed head injury, drugs, etc.)
General anesthesia for extra-abdominal procedures
Cord injury

Contraindications

Clear indication for exploratory laparotomy
Relative contraindications:

Previous exploratory laparotomy
Pregnancy
Obesity

Blunt hepatic injuries in hemodynamically stable patients without other indications for exploration are best served by a conservative, nonoperative approach. [49] [50] [51] These stable patients without peritoneal signs are better evaluated by ultrasound, and if abnormalities are found, a CT scan with contrast should be obtained  In the absence of contrast extravasation during the arterial phase of the CT scan, most injuries can potentially be treated nonoperatively. The classic criteria for nonoperative treatment of liver injuries include hemodynamic stability, normal mental status, absence of a clear indication for laparotomy such as peritoneal signs, low-grade liver injuries (grade I-III), and transfusion requirements of less than 2 units of blood. Recently, these criteria have been challenged and a broader indication for nonoperative management has been used. It has been demonstrated that most of these patients are monitored by serial hematocrit and vital signs rather than by serial abdominal examinations, which is the reason why intact mental status is not the sine qua non for nonoperative management. Furthermore, if the hematocrit drops, most patients will undergo a repeat CT scan to evaluate and quantify the hemoperitoneum. The overall reported success of nonoperative management of blunt hepatic injuries is greater than 90% in most series. Breaking it down by injury grade, the success rate of nonoperative treatment of injury grades I to III approaches 95%, whereas for injury grades IV and V the success rate decreases to 75% to 80%. With the use of angiography and superselective embolization in patients with persistent bleeding, the success rate may in fact be higher.

DPL is a rapid and accurate test used to identify intra-abdominal injuries after blunt trauma in a hypotensive or unresponsive patient without obvious indication for abdominal exploration. Standard criteria for positive DPL findings in blunt trauma include aspiration of at least 10 mL of gross blood, a bloody lavage effluent, a red blood cell count greater than 100,000/mm3, a white blood cell count greater than 500/mm3, amylase level greater than 175 IU/dL, or detection of bile, bacteria, or food fiber

For patients undergoing DPL evaluation, laboratory value cutoffs are different for those with thoracoabdominal stab wounds and for those with standard anterior abdominal stab wounds (see Table 7-6). An RBC count of >10,000/L is considered a positive finding and an indication for laparotomy; patients with a DPL RBC count between 1000/L and 10,000/L should undergo laparoscopy or thoracoscopy. Patients with stab wounds to the right upper quadrant can undergo CT scanning to determine trajectory and confinement to the liver for potential nonoperative care.Those with stab wounds to the flank and back should undergo triple-contrast CT to detect occult retroperitoneal injuries of the colon, duodenum, and urinary tract.

Table 7-6 Criteria for “Positive” Finding on Diagnostic Peritoneal Lavage
Anterior Abdominal Stab Wounds Thoracoabdominal Stab Wounds
Red blood cell count >100,000/mL >10,000/mL
White blood cell count >500/mL >500/mL
Amylase level >19 IU/L >19 IU/L
Alkaline phosphatase level >2 IU/L >2 IU/L
Bilirubin level >0.01 mg/dL >0.01 mg/dL

Treatment of choice for stab injury caecum –
a)Caecostomy (Al 89)
b)Ileo-transverse anastomosis
c)Transverse colostomy
d)Sigmoid colostomy

Sabiston:-Penetrating colon injuries requiring resection (colostomy versus primary anastomosis) were recently evaluated in a prospective multicenter study. The type of colon management was not found by multivariate analysis to be a risk factor for abdominal complications. The authors concluded that once resection is necessary, the surgical method of colon management does not affect the incidence of abdominal complications, irrespective of associated risk factors, and that primary anastomosis should be considered in all patients.

Haemostasis in scalp wound is best achived by –
a)Direct presure over the wound (AIIMS 79,
b)Catching and crushing the PGI 85) bleeders by haemostats
c)Eversion of galea aponeurotica
d)Coagulation of bleeders

In penetrating injury of abdomen commonly affected is – (AIMS 94)
a) Liver b) Large bowel
c) Duodenum d) Small intestines

Death in blunt trauma chest is due to -(AIIMS 98)
a) Rupture oesophagus
b) Tracheobronchial injury c)Pulmonary contusions
d)Chylothorax

A 12 hour old bullet injury to the left colon is ideally treated by – (AIIMS 99)
a)Primary closure without drainage
b)Primary closure with drainage
c)Resection of affected segment with upper segment colostomy and lower segment as a mucus fistula
d)Primary repair with loop colostomy

Currently, three methods for treating colonic injuries are used: primary repair, end colostomy, and primary repair with diverting ileostomy. Primary repairs include lateral suture repair or resection of the damaged segment with reconstruction by ileocolostomy or colocolostomy. All suturing and anastomoses are performed using a running single-layer technique . The advantage of definitive treatment must be balanced against the possibility of anastomotic leakage if suture lines are created under suboptimal conditions. Alternatively, although use of an end colostomy requires a second operation, an unprotected suture line with the potential for breakdown is avoided. Numerous large retrospective and several prospective studies have now clearly demonstrated that primary repair is safe and effective in virtually all patients with penetrating wounds.Colostomy is still appropriate in a few patients, but the current dilemma is how to select which patients should undergo the procedure. Currently, the overall physiologic status of the patient, rather than local factors, directs decision making. Patients with devastating left colon injuries requiring damage control are clearly candidates for temporary colostomy. Ileostomy with colocolostomy, however, is used for most other high-risk patients

Primary repair can be selected when known associated complicating factors have been excluded. General criteria for primary repair include early diagnosis (within 4-6 hours), absence of prolonged shock or hypotension, absence of gross contamination of the peritoneal cavity, absence of associated colonic vascular injury, less than 6 units of blood transfused, and no requirement for the use of mesh to permanently close the abdominal wall.Most patients with low-risk penetrating colonic injuries can be treated by primary closure or resection and primary anastomosis by following these guidelines. High-risk colon injuries or those associated with severe injuries will benefit from resection and colostomy. Exteriorization of the colonic repair has been performed infrequently because of extremely high rates of failure, repair breakdown, and infectious complications. Some surgeons use different approaches to treat injuries on the right side than on the left side of the colon; however, no prospective randomized data are available to compare primary repair performed on right-sided colonic injuries with end-colostomy for left-sided injuries

Which one of the following veins should be avoided for intravenous infusion in the managment of abdominal trauma – (UPSC 2001)
a) Cubital b) Cephalic
c) Long saphenous d) External jugular

Ans. is ‘d’ i.e., External jugular [Ref C.S.D.T. 8th/e p. 178]
Percutoneously placed central venous cathater should not be used for initial Resusctitation, because lines are too long to permit rapid infusion and complications may occurs that can not be tolrated in emergency situation

Schwartz:- A rule of thumb to consider is placement of femoral access for thoracic trauma and jugular or subclavian access for abdominal trauma. However, placement of jugular or subclavian central venous catheters provides a more reliable measurement of central venous pressure (CVP), which is helpful in determining the volume status of the patient and excluding cardiac tamponade. In hypovolemic patients under 6 years of age, an intraosseous needle can be placed in the proximal tibia (preferred) or distal femur of an unfractured extremity

Which one of the following is not a part of the Revised Trauma score – (UPSC 2001)
a)Glasgow coma scale
b)Systolic blood pressure
c)Pulse rate
d)Respiratory rate

Following trauma, which hormone is not released—
a) Thyroxine b) Glucagon (AI 92)
c) ADH d) GH

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Surgery MCQs (Arterial,Venous Disorders & Lymphatic Disorders)

Posted by Dr KAMAL DEEP on May 31, 2011

Commonest cause of A-V fistulae is – (AI 88)
a) Congenital b) Traumatic
c) Surgical creation d) Tumour erosion

Congenital A-V fistulas in the thigh will be associated with all except – (PGI 89)
a)Increased cardiac output
b)Increased skin tempreture
c)Gigantism of limb
d)Superficial venous engorgement

Continuous murmur is not found in- (AIIMS 89)
a)PDA
b)Systemic A-V fistula
c)Rupture of sinus of valsalva
d)Double outlet right ventricle

AV fistula leads to all except – (AIIMS 98)
a)Sinus tachycardia
b)Increased preload
c)Cardiac arrythm ias
d)Increased cardiac output

AV fistula causes – (PGI 98)
a) dec Diastolic b) inc Venous return
c) dec Venous congestion d) inc Systolic fillin

Nicoladoni branham sign is – (PG198)
a)Compression cause bradycardia
b)Compression cause tachycardia
c)Hypotension
d)Systolic filling

True regarding AV fistula is – (PGI 02)
a)Leads to cardiac failure
b)Causes local gigantism
c)Can cause ulcers
d)Cause excess bleeding on injury

e)Closes spontaneously

Complications arising out of A – V fistula done for renal failure include the following EXCEPT –
a)Infection (Jipmer 03)
b)Thrombosis
c)High output cardiac failure
d)Necrosis of the distal part

Ans. is ‘d’ i.e., Necrosis of the distal part [Ref Sabiston 161"/e p.1456; Love & Bailey 246/e p.950 ; 23"//e p.23]

Pulsating varicose vein in a young adult is due to-
a)Arteriovenous fistula (AIIMS 92)
b)Sapheno femoral incompetence
c)Deep vein thrombosis
d)Abdominal tumour

In Osler Weber Rendu syndrome A.V. fistulas occur.

The clinical features depend on the location and size of the fistula. Frequently, a pulsatile mass is palpable, and a thrill and bruit lasting throughout systole and diastole are present over the fistula. With longstanding fistulas, clinical manifestations of chronic venous insufficiency, including peripheral edema; large, tortuous varicose veins; and stasis pigmentation become apparent because of the high venous pressure. Evidence of ischemia may occur in the distal portion of the extremity. Skin temperature is higher over the arteriovenous fistula. Large arteriovenous fistulas may result in an increased cardiac output with consequent cardiomegaly and high-output heart failure.

The diagnosis is often evident from the physical examination. Compression of a large arteriovenous fistula may cause reflex slowing of the heart rate ( Nicoladoni -Branham sign).

Physiological effect
The combination of an uncontrolled leak from the high-pressure arterial system and an enhanced venous return and venous pressure results in an increase in pulse rate and cardiac output. The pulse pressure is high if there is a large and persistent shunt. Left ventricular enlargement and, later, cardiac failure occur. A congenital fistula in the young may cause overgrowth of a limb. In the leg, indolent ulcers may result from relative ischaemia below the short circuit.
Clinical signs
Clinically, a pulsatile swelling may be present if the lesion is relatively superficial. On palpation, a thrill is detected and auscultation reveals a buzzing continuous bruit. Dilated veins may be seen, in which there is a rapid blood flow. Pressure on the artery proximal to the fistula causes the   swelling to diminish in size, the thrill and bruit to cease, the pulse rate to fall [known variously as Nicoladoni’s (1875) or Branham’s (1890) sign] and the pulse pressure to return to normal.

220px-Radiocephalic_fistula_svg

AV (arteriovenous) fistulas are recognized as the preferred access method. To create a fistula, a vascular surgeon joins an artery and a vein together through anastomosis. Since this bypasses the capillaries, blood flows rapidly through the fistula. One can feel this by placing one’s finger over a mature fistula. This is called feeling for "thrill" and produces a distinct ‘buzzing’ feeling over the fistula. One can also listen through a stethoscope for the sound of the blood "whooshing" through the fistula, a sound called bruit.

Fistulas are usually created in the nondominant arm and may be situated on the hand (the ‘snuffbox‘ fistula’), the forearm (usually a radiocephalic fistula, or so-called Brescia-Cimino fistula, in which the radial artery is anastomosed to the cephalic vein), or the elbow (usually a brachiocephalic fistula, where the brachial artery is anastomosed to the cephalic vein). A fistula will take a number of weeks to mature, on average perhaps 4–6 weeks. During treatment, two needles are inserted into the fistula, one to draw blood and one to return it.

The advantages of the AV fistula use are lower infection rates, because no foreign material is involved in their formation, higher blood flow rates (which translates to more effective dialysis), and a lower incidence of thrombosis. The complications are few, but if a fistula has a very high blood flow and the vasculature that supplies the rest of the limb is poor, a steal syndrome can occur, where blood entering the limb is drawn into the fistula and returned to the general circulation without entering the limb’s capillaries.

Maximum tourniquet time for the upper limb is –
a) 1/2 hour b) 1 hr (JIPMER 87)
c) 1-1/2 hrs.
d) 2 hrs
e) 2-1/2 hrs

Sabiston:-  Tourniquet Application:-       The tourniquet is used to provide a bloodless field so that clear visualization of all structures in the operative field is obtained. Penrose drains, rolled rubber glove fingers, or commercially available tourniquets can be used on digits. Great care must be taken in using any constrictive device on digits because narrow bands cause direct injury to underlying nerves and digital vessels. With the use of an arm tourniquet, the skin beneath the cuff must be protected with several wraps of cast padding. During skin preparation, this area must be kept dry to prevent blistering of the skin under an inflated cuff over moist padding. The cuff selected needs to be as wide as the diameter of the arm. Standard pressures used are 100 to 150 mm Hg greater than systolic blood pressure. The cuff is deflated every 2 hours for 15 to 20 minutes (5 minutes of reperfusion for every 30 minutes of tourniquet time) to revascularize distal tissues and to relieve pressure on nerves locally before reinflating the cuff for more extensive procedures.  Exsanguination of the extremities is performed by wrapping the extremity with a Martin’s bandage in all cases, except those involving infection or tumors. In these latter cases, because of the possibility of embolization by mechanical pressure, exsanguination by bandage wrapping needs to be avoided. Simple elevation of the extremity for a few minutes before tourniquet inflation suffices.

Bailey:-  Tourniquet:-    A bloodless field is essential for accurate surgery. A well-padded tourniquet above the elbow, inflated to 75 mmHg pressure over the systolic blood pressure, is usually satisfac­tory. The time should not exceed 2 hours. An Esmarch bandage or a rubber-tube exsanguinator are effective, but should be avoided for tumour or infection cases lest the pathology is spread systemically. In the finger, a tourniquet can be made by placing a sterile glove on the patient, snipping off the tip and then rolling the glove down to the base of the finger.

 

Thromboembolism after pelvic surgery is usually from the veins – (A189)
a) iliac b) Calf
c) Femoral d) Pelvic

An obese patient develops acute oedematous lower limb following a Pelvic surgery. Deep vein thrombosis is suspected . The most useful investigation in this case would be – (UPSC 2002)
a) Doppler imaging b) Fibrinogen uptake
c) Venography d) Plethysmography

Which of these is not a risk factor for thromboembolism – (TN 2001)
a)Myocardial infarction
b)Hypertension
c)Estrogen therapy
d)Superficial thrmbophlebitis

Most common cause of death in patients with
Burger’s disease is – (AIIMS 87)
a) Gangrena b) Pulmonary embolism
c) Myocardial infarction d) Carcinoma lung

Which of the following best responds to sympathectomy – (JIPMER 86)
a) Burger’s disease b) Hyperhydrosis
c) Raynaud’s disease d) Acrocyanosis

Intermittent claudication at the level of the hip indicates – (PGI 87)
a)Popliteal artery occlusion
b)Bilateral iliac artery occlusion
c)Common femoral occlusion
d)superficial femoral artery occlusion

The artery commonly involved in cirsoid aneurysm is – (PGI 88)
a) Occipital b) Superficial temporal
c) Internal carotid d) External carotid

Plusating tumours include all except – (PGI 88)
a)Bone sarcoma
b)Osteoclastoma
c)Secondaries from hyper nephromas
d)Secondary from prostate

Preferred material for femoro popliteal bypass –
a) Dacron b) PTFE (PGI 89)
c) Saphenous vein d) Gortex

Prosthetic materials For bypass of the aortoiliac segment the favoured material is Dacron (Fig. 15.21a). Prostheses come in two types: woven and knitted. Woven grafts tend to leak less when first exposed to blood flow during surgery, but newer knitted prostheses may be sealed with gelatin or collagen by the manufacturer and may leak even less than their woven counterparts. In the final analysis, there is probably little to choose between any of the styles of Dacron graft; all achieve satisfactory results. For bypass in the femoropopliteal region, if autogenous long saphenous vein (or other veins such as the short saphenous or arm vein) is not available, PTFE (Fig. 15.21b) or glutaraldehyde-tanned, Dacron-supported, human umbilical vein (Fig. 15.21c) may be employed. In general, any vein used requires a diameter of at least 3.5mm. For profundaplasty, a small piece of vein may be used or, alternatively, PTFE or Dacron. Suture materials for vascular surgery are usually monofilament in nature; polypropylene has been particularly popular. In the aorta it is usual to use 2/0 or 3/0 polypropylene. In the femoral artery at the groin it is usual to use 4/0 or 5/0 polypropylene. Finer sutures, up to 7/0, may be needed further down the limb. PTFE may (alternatively) be stitched using a suture of the same material. PTFE sutures tend to cause less bleeding through stitch holes in the graft substance.

image

Most common cause of aneurysm of abdominal aorta is – (A196)
a) Trauma b) Atherosclerosis
c) Syphilis d) Cystic medial necrosis

The most common complication of an aortic aneurysm size 8 cm is – (Delhi, PG 96)
a) Rupture b) Intramural thrombosis
c) Embolism d) Calcification

Management of a cause of iliac artery embolism requires – (JIPMER 81, UPSC 86)
a)Embolectomy
b)Injection of vasodilators
c)Hypotensive therapy
d)Sympathectomy

Intermittent claudicatin is caused by – (TN 89)
a)Venous occlusion
b)Arteria insufficiency
c)Nerual compression
d)Muscular dystrophy

Burger’s disease is seen in – (PGI 88)
a) Only male b) Age less than 40
c) Age more than 40 d) Smoker

In the abdomen, aneurysms of the …. commonly occur next only to the aorta …. – (PGI 88)
a)Internal iliac artery
b)External iliac artery
c)Splenic artery
d)Inferior mesentric artery

In extraperitoneal approach, to left sympathectomy the following may be injured –
a) Ureter b) Gonadal vessels
c) A+B d) IVC

Lumbar sympathectomy is indicated in – (TN 90)
a)Intermittent claudication
b)TAO with skin changes
c)Burger’s disease
d)Raynaud’s disease

Commonest site of throboangitis obliterans is –
a) Femoral artery b) Popiteal artery (A190)
c) iliac artery d) Pelvic vessels

 

Treatment of acute femoral embolus is- (AIIMS 91)
a)Warfarin
b)Heparin
c)Immediate embolectomy
d)Embolectomy after 5 days bed rest

Ganglion which is spared in Lumbar sympathetomy is – (JIPMER 92)
a) Ll b) L2
c) L3 d) L4

Surgical lumbar sympathectomy may be indicated in arterial disease. Surgical or chemical (phenol injection) sympathectomy may be used to treat rest pain or other troublesome sensory symptoms in arterial disease or in causalgia. The segment of the chain including the second and third lumbar ganglia is removed: preservation of the first lumbar ganglion is said to lessen the risk of ejaculatory problems 
image

Vessels most commonly involved in thrombo angitis obliterans – (AIIMS 92)
a)ilio-femoral
b)Aorto-iliac
c)Femora popliteal
d)Arterior and Posterior tibial

Following are used in treatment of Buergers disease except – (Al 93)
a) Trental b) Anticoagulation
c) Sympathectomy d) Antiplatelets

Buerger’s disease affects all except – (PGI 01)
a) Small arteries b) Small veins
c) Medium -size arteries d) Multiparity
e) First pregnancy after 30 years

Buerger’s disease is associated with – (rGI 02)
a) smoking b) Poor nutrition
c) Alcohol d) Prolonged standing
e) Superficial thrombophlebitis

The most common cause of peripheral limb ischaemia in India is – (AIIMS NOV 05)
a) Trauma b) Altherosclerosis
c) Buerger’s disease d) Takayastu’s disease

A 45-year-old male having a long history of cigarette smoking presented with gangrene of left foot. An amputation of the left foot was done. Representative sections from the specimen revealed presence of arterial thrombus with neutrophilic infiltrate in the arterial wall. The inflammation also extended into the neighbouring veins and nerves. The most probably diagnosis is – (AIIMS 06)
a)Takayasu arteritis
b)Giant cell arteritis
c)Hypersensitivity angiitis
d)Thromboangiitis obliterans

Ans. is ‘d’ i.e., Thromboangiitis obliterans [Ref: Hariison 166/e p. 1487; Schwartz 86/e p. 792]

THROMBOANGIITIS OBLITERANS :- Thromboangiitis obliterans (Buerger’s disease) is an inflammatory occlusive vascular disorder involving small and medium-sized arteries and veins in the distal upper and lower extremities. Cerebral, visceral, and coronary vessels may be affected rarely. This disorder develops most frequently in men <40 years. The prevalence is higher in Asians and individuals of eastern European descent. While the cause of thromboangiitis obliterans is not known, there is a definite relationship to cigarette smoking in patients with this disorder. In the initial stages of thromboangiitis obliterans, polymorphonuclear leukocytes infiltrate the walls of the small and medium-sized arteries and veins. The internal elastic lamina is preserved, and a cellular, inflammatory, thrombus develops in the vascular lumen. As the disease progresses, mononuclear cells, fibroblasts, and giant cells replace the neutrophils. Later stages are characterized by perivascular fibrosis, organized thrombus, and recanalization. The clinical features of thromboangiitis obliterans often include a triad of claudication of the affected extremity, Raynaud’s phenomenon, and migratory superficial vein thrombophlebitis. Claudication is usually confined to the calves and feet or the forearms and hands because this disorder primarily affects distal vessels. In the presence of severe digital ischemia, trophic nail changes, painful ulcerations, and gangrene may develop at the tips of the fingers or toes. The physical examination shows normal brachial and popliteal pulses but reduced or absent radial, ulnar, and/or tibial pulses. Arteriography is helpful in making the diagnosis. Smooth, tapering segmental lesions in the distal vessels are characteristic, as are collateral vessels at sites of vascular occlusion. Proximal atherosclerotic disease is usually absent. The diagnosis can be confirmed by excisional biopsy and pathologic examination of an involved vessel. There is no specific treatment except abstention from tobacco. The prognosis is worse in individuals who continue to smoke, but results are discouraging even in those who do stop smoking. Arterial bypass of the larger vessels may be used in selected instances, as well as local debridement, depending on the symptoms and severity of ischemia. Antibiotics may be useful; anticoagulants and glucocorticoids are not helpful. If these measures fail, amputation may be required.

Lumbar sympathectomy:- Operative method. Using a transverse loin incision, an extraperitoneal approach is used in which the colon and peritoneum, to which the ureter clings, are stripped medially so as to expose the inner border of the psoas muscle .The sympathetic trunk lies on the sides of the bodies of the lumbar vertebrae; on the right side it is overlapped by the vena cava. Lumbar veins are apt to cross the trunk superficially. The sympathetic trunk is divided on the side of the body of the fourth lumbar vertebra. It is then traced upwards to be divided above the large second lumbar ganglion, which is easily recognised by the number of white rami which join it. Care should be taken not to mistake small lymph nodes, lymphatics, the genitofemoral nerve or the occasional tendinous strip of the psoas minor for the sympathetic chain. It is possible to perform the operation via an endoscope after the creation of a suitably expanded retroperitoneal tissue plane. Along with a decline in the recognised indications for sympathectomy there has been a move away from the operative approach in favour of the less hazardous chemical (phenol) sympathectomy.
Chemical method. This is contraindicated in patients taking anticoagulants. Under radiographic fluoroscopic control, with the   patient in the lateral position, local anaesthetic is injected. A long spinal needle is then inserted  to seek the side of the vertebral body and to pass alongside it to reach the lumbar sympathetic chain. After confirming the needle position by injection of contrast agent, approximately 5 ml of phenol in water is injected. This is usually done at two sites: beside the bodies of the second and fourth lumbar vertebrae. Great care is needed to avoid penetrating the aorta, cava or ureter; the plunger of the syringe must always be drawn back before injection to exclude the presence of blood.

In a lumbar sympathectomy the sympathetic chain in its usual position is likely to confused with the – (pal 81, AIIMS 80, 82)

a) Ureter b) Psoas minor
c) Genitofemoral nerve
d) Ilioinguinal nerve e) Lymphatics

The commonest cause of aneurysm formation
is – (JIPMER 80, Delhi 89)
a) Gun shot injury b) Syphilis
c) Congenital factors
d) Atherosclerosis

Bullet wounds near major blood vessels should
be explored only if- (PGI 81, AMC 85)
a)The extremity is cold
b)The fingers or toes are paralysed
c)The pulse is weakened
d)There in no pulse
e)In all cases regardiess of physical findings

A knitted Dacron artery graft (PGI 99, AIIMS 84)
a)Is not porous
b)Is eventually dissolived by tissue reaction
c)Never gets infected
d)Can be easily incised and the opening resutured

The sequence of symptoms in pulmonary embolism is – (JIPMER 89, DNB 90)
a)Fever, pain, dyspnoea
b)Fever, dyspnoea
c)Dysponea, pain, haemoptysis
d)Dysponea, cough, purulent sputum

A useful through temporary improvement in a patient’s ischaemic foot can be attained by giving intravenously – (PGI 79, Delhi 84)
a) 10% Mannitol b) 10% Dextrose
c) Dextran 40 d) Dextran 100

Diabetic gangrene is due to – (Kerala 94)
a)’schema
b)Increased blood glucose
c)Altered defence by host and neuropathy
d)All of the above

All are true about Embolic Arterial occlusion except-
a)No previous history (JIPMER 95)
b)Muscles are unaffected
c)Pulse is absent
d)Anaesthesia is present

All are true about Raynauds phenomena except-
a)Exposure to cold aggravate (Kerala 95)
b)Spasm of vessels
c)More common is females
d)Atherosclerosis of vessels

The commonest site of iodgement of a pulmonary embolus is in the territory at – (UPSC 95)
a) Rt. lower lobe b) Rt. upper lobe
c) Lt. lower lobe
d) Lt. upper lobe

Kaposi sarcoma is commonly seen in – (AMU 95)
a) Upper limbs
b) Lower limbs
c) Head and Neck d) Trunk

Which of the following causes meximum bleeding-
a)Partial arterial severing (PGI 95)
b)Complete arterial severing
c)Artery caught between fractured ends of bones
d)Intimal tear

In a 40 years old male thrombus in the common femoral artery is because of – (AIIMS 97)
a)Atheroma
b)Thrombangits obliterans
c)Reynauds disease
d)Abdominal mass

One of the following is not indicated for arterial
leg ulcer – (PGI 96)
a) Debridement b)
Elevation of limb
c) Head end of bed is raised d) Low dose aspirin

Not used as graft material in peripheral vascular disease – (PGI 97)
a) Dacron graft b) Vein
c) PTFE d) PVC

The commonest cause of arterio-venous fistula is-
a)Penetrating injury (MP 97)
b)Congenital
c)Neoplasmic invasion of an artery and adjacent vein
d)Aneurysm of the artery eroding a vein

AV fistula leads to all except – (AIIMS 98)
a)Sinus tachycardia
b)Increased preload
c)Cardiac arrythm ias
d)Increased cardiac output

Commonest peripheral aneurysm is – (SCTIMS 98) a) Popliteal b) Femoral
c) Carotid d) iliac

Popliteal aneurysm-All are true except-
a)Presents as a swelling (SCTIMS 98) behind the knee
b)Presents with symptoms due to complication
c)Surgery is indicated in case of complication
d)Uncommon among peripheral aneurysm

Graft used in infra inguinal by pass is 4Jipmer 2K)
a) PTFE b) Dacron
c) Autologous vein d) Autologous artery

True about Erythrocyanosis except — (A.P 96)
a)Affects young girls
b)Cold peripheries
c)Palpable pulses
d)Ulceration & gangrene of fingers

Diabetic gangrene is due to AfE (TN 86)
a)Vasospasm
b)Atherosclerosis
c)Peripheral neuritis
d)Increased sugar in blood

Pseudo aneurysms are most commonly due- (Jipmer a) Atherosclerosis b) Trauma 93)
c) Congenital deficiency d) Infections

Bilateral pulseless disease in upper limbs in caused
by- (PGI 97)
a) Aortoarteritis b) Coarctation of aorta
c) Fibromuscular dysplsia d) Buerger’s disease

Abdominal Aneurysm is characterized by all except – (PGI 2000)
a)Elective surgery complication should be < 5%
b)Emergency surgery complication < 10%
c)Rarely asymptomatic before rupture

d)Bigger the size it is more prone to rupture

Dissection of which artery is seen in pregnancy –
a) Carotid artery b) Aorta (PGI 2000)
c) Coronary A d) Femoral artery

Peripheral arterial occlusion (Sudden onset) is characterized all except – (PGI 2000)
a) Paresthesia b) Rubor
c) Pallor d) Pain

In which one of the following conditions Dactylitis CANNOT be seen- (UPSC 02)
a) Sickle – cell anemia b) Beta thalassemia
c) Congenital syphilis d) Tuberculosis
e) Sarcoidosis

Not seen in sudden onset peripheral arterial occlusion – (Kerala 04)
a) Pain b) Rubor
c) Pallor d) Anesthesia

Drug used for Burger’s disease – (MAHE 05)
a) Xanthinol micotinate b) Propranolol
c) GTN d) All the above

Pseudoarterial aneurysm in drug abuser’s seen in -a) Radial b) Brachial (PGI June 05)
c) Femoral d) Carotid
e) Pedal

Syndrome of internal iliac artery occlusion manifested by – (PGI June 05)
a)Pain in calf
b)Absent pulse at the dorsalis pedis artery
c)Intermittent claudication

d)Gangrene

The most common cause of peripheral limb ischaemia in India is – (AIIMS NOV 05)
a) Trauma b) Altherosclerosis
c) Buerger’s disease d) Takayastu’s disease

Lumbar sympathectomy is of value in the management of- (AI 05)
a)Intermittent claudication
b)Distal ischaemia affecting the skin of the toes
c)Arteriovenous Fistula
d)Back pain

The most common cause of acquired arteriovenous fistuala is – (Al 06)
a) Bacterial infection b) Fungal infection
c) Blunt trauma d) Penetrating trauma

Etiopathogenesis of diabetic foot include the following except- (UPSC 07)
a)Myelopathy
b)Osteoarthropathy
c)Microangiopathy
d)Infection

Fogarty’s catheter is used for – (UPSC 07)
a)Drainage of urinary bladder
b)Parenteral hyperalimentation
c)Removal of embolus from blood vessels
d)Ureteric catheterisation

Pseudoaneurysms in IV drug abusesrs seen commonly in – (PGI June 07)
a)Brachial artery
b)Radial artery
c)Femoral artery

Treatment of femoral artery naeurysm –
a)Ultrasound guided compression of the neck of aneurysm (PGI June 07)
b)Thrombin injection
c)Bypass graft repair

 

Venous Disorders:-

Bailey & Love,Gray, Sabiston

imageimageimageimage 

Perforators are not present at – (AIIMS Nov 07)
a) Ankle b) Medial calf
c) Distal to calf d) Below inguinal ligament


The superficial veins are in the subcutaneous connective tissue and are interconnected with and ultimately drain into the deep veins. The superficial veins form two major channels-the great saphenous vein and the small saphenous vein. Both veins originate from a dorsal venous arch in the foot:

  • the great saphenous vein originates from the medial side of the dorsal venous arch, and then ascends up the medial side of the leg, knee, and thigh to connect with the femoral vein just inferior to the inguinal ligament;
  • the small saphenous vein originates from the lateral side of the dorsal venous arch, ascends up the posterior surface of the leg, and then penetrates deep fascia to join the popliteal vein posterior to the knee; proximal to the knee, the popliteal vein becomes the femoral vein.

The superficial and deep veins join at a number of points. The short saphenous vein terminates at the saphenopopliteal junction (SPJ) and the long saphenous vein at the saphenofemoral junction (SFJ) in the groin. Here the flow in the superficial veins joins that in the deep veins. There is, in addition, a number of places in the calf and thigh where flow in the superficial veins may also join that in the deep veins. These is the ankle, calf and thigh communicating or perforating veins (Fig. 16.3). The names of these veins come from their course from the superficial to the deep venous system in which they perforate the deep fascia of the leg. Near the ankle are the Cockett perforating veins, near the knee the Boyd perforators and in the thigh the Hunterian perforating vein. All veins in the upper and lower limbs contain valves every few centimetres which ensure that blood flows towards the heart.

Multiple perforator veins traverse the deep fascia to connect the superficial and deep venous systems. Clinically important perforator veins are the Cockett and Boyd perforators. The Cockett perforator veins drain the medial lower leg and are relatively constant. They connect the posterior arch vein (a tributary to the GSV) and the posterior tibial vein. They may become varicose or incompetent in venous insufficiency states. The Boyd perforator veins connect the GSV to the deep veins approximately 10 cm below the knee and 1 to 2 cm medial to the tibia.

Earliest sign of deep vein thrombosis is(AIIMS 87) a) Calf tenderness b) Rise in temperature c) Swelling of calf muscle d) Homan’s sign

 Injection sclerotherapy for varicose veins is by using – (PGI 88)
a) Phenol b) Absolute alcohol
c) 70% alcohol d) Ethanolamine oleate

Sclerotherapy acts by destroying the venous endothelium. Sclerosing agents include hypertonic saline, sodium tetradecyl sulfate, and polidocanol. Concentrations of 11.7 to 23.4% hypertonic saline, 0.125 to 0.250% sodium tetradecyl sulfate, and 0.5% polidocanol are used for telangiectasias. Larger varicose veins require higher concentrations: 23.4% hypertonic saline, 0.50 to 1% sodium tetradecyl sulfate, and 0.75 to 1.0% polidocanol.83 Elastic bandages are wrapped around the leg after injection and worn continuously for 3 to 5 days to produce apposition of the inflamed vein walls and prevent thrombus formation. After the bandages are removed, elastic compression stockings should be worn for a minimum of 2 weeks. Complications from sclerotherapy include allergic reaction, pigmentation, thrombophlebitis, DVT, and possible skin necrosis.

White leg is due to – (TN 90)
a)Femoral vein thrombosis and lymphatic obstruction
b)Deep femoral vein thrombosis
c)Lymphatic obstruction only
d)None of the above

All of the following are seen in deep vein thrombosis except – (Al 90)
a) Pain b) Discolouration
c) Swelling d) Claudication

The following is the commonest site for venous ulcer- (A IIMS 91)
a)Instep of foot
b)Lower 1/3 leg and ankle
c)Lower 2/3 of leg
d)middle 1/3 of leg

The most important perforator of the Lower limb is between – (ALL INDIA 92 )
a)Long saphenous and posterior tibial vein
b)Short saphenous and posterior tibial vein
c)Short saphenous and popliteal vein
d)Long saphenous and femoral vein

Best method for diagnosis of Deep vein thromvosis is – (JIPMER 92)
a)Doppler examination
b)Plethysmography
c)Contrast phlebography
d)1131 Fibrinogen studies

Commonest complication varicose vein stripping is-
a) Thrombo embolism b) Hemorrhage
c) Ecchymosis d) Infection

Investigation of choice for diagnosis of deep vein thrombosis – (AIIMS 92)
a) Venogram
b) Doppler
c) Isotope scan d) Homans sign

Pulsating varicose vein in ayoung adult is due to-
a)Arteriovenous fistula (AIIMS 92)
b)Sapheno femoral incompetence
c)Deep vein thrombosis
d)Abdominal tumour

Which is not used in treatment of Superficial venous thrombosis – (AIIMS 92)
a)Immediate anticoagulation
b)Rest and elevation
c)Analgesics
d)Treat assosiated malignancy

Most common complication of varicose vein stripping is – (JIPMER 78, AIMS 79,92)
a) Infection b) Haemorrhage
c) Ecchymosis d) Thrombo embolism

An operated case of varicose veins has a recurrence rate of – (AIIMS 80, AP 89)
a) About 10% b) About 25%
c) About 50% d) Over 60%

What is acceptable in the management of femoral vein thrombosis – (AIIMS81, PGI 86)
a)Bed rest and spiral elastic bandages
b)A venogram
c)Thrombectomy
d)Embolectomy
e)A mobin udin umbrella inserted into the vein

Operative Venous Thrombectomy

In patients with acute iliofemoral DVT, surgical therapy is generally reserved for patients who worsen with anticoagulation therapy and those with phlegmasia cerulea dolens and impending venous gangrene. If the patient has phlegmasia cerulea dolens, a fasciotomy of the calf compartments is first performed. In iliofemoral DVT, a longitudinal venotomy is made in the common femoral vein and a venous balloon embolectomy catheter is passed through the thrombus into the IVC and pulled back several times until no further thrombus can be extracted. The distal thrombus in the leg is removed by manual pressure beginning in the foot


Operations for varicose veins are best accomplished by – (PGI 81, AIIMS 84, 86)
a)Stripping
b)Multiple subcutaneos ligatures
c)Subfascial ligatures
d)Division and ligation at the superficial venous system

A 60-years old male has been operated for carcinoma of caecum and right hemicolectomyhas been done. On the fourth post – oprative day, the patient develops fever and pain in the legs. The most important clinical entity one should lookfor is – (UPSC 96)
a)Urinary tract infection
b)Intravenous line infection
c)Chest infection
d)Deep vein thrombosis

All of following may be predisposing factors for deep vein thrombosis except – (AIIMS 95)
a) Oral contrceptives b) Nephrotic syndrome
c) Sickle cell anemia d) Thrombocytosis

The duration of heparin therapy in deep vein thrombosis is – (CUPGEE 96)
a) 7 – 10 days b) 15-20 days
c) 3-4 days d) 1 month

Cocket & Dodd’s operation is for (AP 96)
a)Saphenofemoral flush ligation
b)Subfascial ligation
c)Deep vein thrombosis
d)Diabetic foot

In obstruction of inferior vena cava there is -(A197)
a)Prominent thoraco epigastric vein
b)Caput medusa
c)Hemorrhoids
d)Esophageal varices

Most accurate & non invasive method for diagnosing deep vein thrombosis – (JIPMER 98)
a)Doppler duplex
b)Plethesmography
c)Radioactive labelled fibrinogen
d)Angiography

Most common site for venous thrombosis -(JIPMER a) Popliteal vein b) Soleal vein 98)
c) Femoral vein d) Internal iliac vein

Deep vein thrombosis is caused by all except –
a)Lower limb trauma (AIIMS 98)
b)Hip and pelvic surgery
c)Subungual melanoma
d)Cushing’s syndrome

Which of the following test is used to detect perforator incompetence in varicose- (JIPMER 2K)
a) Trendelenberg test b) Fegan’s test- (localise)
c) Morissey’s test d) Homan’s test

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The deficiency of all of the following factors increases the incidence of thrombus formation except – (UPSC 2K)
a) Lipoprotein A b) Protein – C
c) Anti – thrombin III d) Protein – S

The most common vein to get thrombosed is the – (AIIMS 99)
a) Long saphenous b) Short saphenous
c) Both d) Posterior tibial

Brodie -Trendlenburg test demonstrates-
a)Mid – thigh perforation (ORRISA 98)
b)Deep vein thrombosis
c)Sapheno — femoral incompetence
d)Calf perforators

An intern was doing saphenous cannulation for a burns patient. Then the patient developed sudden onset of pain along the medial border of the correponding foot. Which nerve must have been accidentally ligated – (AIIMS 2K)
a) Sural nerve b) Deep peroneal nerve
c) Saphenous nerve d) Genicular nerve

In DVT all are seen except (CMC 2001)
a)High fever
b)Increased temperature at site
c)Pain
d)Tenderness

Low Grade Pyrexia is seen not High.

An obese patient develops acute oedematous lower limb following a Pelvic surgery. Deep vein thrombosis is suspected . The most useful investigation in this case would be – (UPSC 2002)
a) Doppler imaging b) Fibrinogen uptake
c) Venography d) Plethysmography

In a patient on anticoagulant therapy, the INR is maintained at – (UPSC 2002)
a)1.5 to 2.5 times the normal
b)2.5 to 3.5 times the normal
c)3.5 to 4.5 times the normal
d)4.5 to 5.5 times the normal

DVT, investigation of choice is – (PGI 97)
a) Doppler b) Plethysmography
c) Venography d) X-ray

In diabetic ulcer, following site is involved-(PGI 97)
a) Heel b) Head of metatarsal
c) Webs d) Tips of toes

For prophylaxis of deep vein thrombosis used is –
a)Warfarin (PGI 97)
b)Heparin
c)Pneumatic shock garment
d)Graded stocking

Effective methods of VTE prophylaxis involve the use of one or more pharmacologic or mechanical modalities. Currently available pharmacologic agents include low-dose UFH, LMWH, synthetic pentasaccharides, and vitamin K antagonists. Mechanical methods include intermittent pneumatic compression (IPC) and graduated compression stockings. Aspirin therapy alone is notadequate for DVT prophylaxis. These prophylaxis methods vary with regard to their efficacy, and the 2008 ACCP Clinical Practice Guidelines stratify their uses according to the patient’s level of risk.

Harrison:-

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Schwartz:-

Thromboembolism Risk and Recommended Thromboprophylaxis in Surgical Patients


Level of Risk Approximate DVT Risk without Thromboprophylaxis (%) Suggested Thromboprophylaxis Options
Low risk:- <10 No specific thromboprophylaxis
Minor surgery in mobile patients   Early and "aggressive" ambulation
Moderate risk:- 10–40 LMWH (at recommended doses), LDUH bid or tid, fondaparinux
Most general, open gynecologic, or urologic surgery   Mechanical thromboprophylaxis
Moderate VTE risk plus high bleeding risk    
High risk:- 40–80 LMWH (at recommended doses), fondaparinux, oral vitamin K antagonist (INR 2–3)
Hip or knee arthroplasty, hip fracture surgery    
Major trauma, spinal cord injury   Mechanical thromboprophylaxis
High VTE risk plus high bleeding risk    

DVT = deep vein thrombosis; INR = International Normalized Ratio; LDUH = low-dose unfractionated heparin; LMWH = low molecular weight heparin; VTE = venous thromboembolism.


 

Deep vein thrombosis is best diagnosed by-(PGI 97)
a) Plethysmography b) Duplex ultrasound
c) Radionuclide scan d) CT scan

Which is true regarding Trendelenburg operation – (PGI 01)
a)Sripping of the superficial varicose vein
b)Flush ligation of the superficial varicose vein
c)Ligation of the perforators
d)Ligation of small tributaries at the distal end of superficial varicose vein
e)Ligation of short saphenous vein

Surgical treatment of varicose veins
Surgical treatment of varicose veins is widely used and is effective in removing varicose veins of the main saphenous trunks, as well as their tributaries, down to a size of about 3 mm. Veins smaller than this are best treated by sclero­therapy. Surgical removal of varices is inappropriate where these form a major part of the venous drainage of the limb, for example where a deep vein thrombosis has destroyed the main axial limb veins and the patient relies on the superficial veins. This possibility may be suggested by the patient’s medical history and can be confirmed by duplex ultrasonography or venography.
The main principles of surgical treatment are to ligate the source of the venous reflux (usually the SFJ or the SPJ) and to remove the incompetent saphenous trunks and the associated varices. Sapheno-femoral ligation alone, sometimes referred to as a ‘Trendelenburg procedure’, is associated with a high rate of recurrence of varices. Recent research has shown that it is necessary to remove the long saphenous vein to ensure that as much venous reflux as possible is eliminated. Similarly, communications between the many deep veins in the popliteal fossa and the short saphenous vein mean that some patients develop recurrences in the short saphenous vein due to the re-establishment of reflux from these veins. This problem may be eliminated by removing the short saphenous vein. Removal of the saphenous veins has the disadvantage that both veins are accompanied by a nerve that may be damaged in the vein stripping operation. To avoid nerve injury the long saphenous vein should not be removed below mid-calf level and great care should be exercised in removing the short saphenous vein.

Sensory nerve injury is seen occasionally after removal of varicose veins. The saphenous nerve and its branches accompany the long saphenous vein in the calf, the sural nerve accompanies the short saphenous vein. Damage to the main part of these nerves occurs in about 1 per cent of operations, but small areas of anaesthesia may occur more frequently (in up to 10 per cent of patients). The adoption of inverting stripping techniques and avoidance of stripping the long saphenous vein below mid-calf level have reduced the risk of damage to these nerves. All patients should be warned before surgery that they may experience small areas of numbness and tingling after the operation. These changes are usually reversible but can be quite persistent.


For which of the following venous abnormality is surgery indicated – (PGI 01)
a)Deep vein incompetence with DVT
b)Deep vein incompetence without DVT
c)Varicosity > 3 cm
b) Varicosity < 3 cm
e) Saphenofemoral incompetence

Imp:- Surgical treatment of varicose veins is widely used and is effective in removing varicose veins of the main saphenous trunks, as well as their tributaries, down to a size of about 3 mm. Veins smaller than this are best treated by sclero­therapy. Surgical removal of varices is inappropriate where these form a major part of the venous drainage of the limb, for example where a deep vein thrombosis has destroyed the main axial limb veins and the patient relies on the superficial veins. This possibility may be suggested by the patient’s medical history and can be confirmed by duplex ultrasonography or venography
Saphenous vein ligation and stripping is still the more commonly performed procedure worldwide, and it may be the preferred therapy for patients with GSVs of very large diameter (>2 cm).

Migratory thrombophlebitis is seen most commonly with- (PGI 02)
a) Pancreatic ca b) Testicular ca
c) Gastric ca d) Breast ca
e) Liver ca

Brodie-Tredenlenburg test is positive in – (PGI 02)
a)Sapheno-Femoral incompetence
b)Perforator competence above knee
c)Deep vein incompetence
d)Perforator competence below knee
e)SVT

Varicose veins are seen in – (PGI 02)
a) DVT
b) Superficial venous thrombosis

c)AV fistula
d)Prolonged standing
e)Obesity

Gold standard diagnostic test in varicose veins is
a)Photoplethysmography (Jipmer 03)
b)Duplex imaging
c)Ultrasonography
d)Radio – labeled fibrinogen study

The initial therapy of documented deep venous thrombosis in a post operative case is –
a)Subcutaneous heparin therapy (Karnataka 03)
b)Intravenous heparin therapy
c)Thropmbolytic therapy with urokinase
d)Aspirin therapy

Which one of the following reagents is not used as sclerosant in the treatment of bleeding varices –
a) Ethyl alcohol .b) Ethanolamine oleate (ICS 05)
c) Phenol d) Sodium morrhuate

Site of diabetic for ulcer – (PGI June 05)
a) Medial malleolus b) Lateral malleolus
c) Heel d) Head of metatarsal
e) Head of toes

Harrison:-Approximately 15% of individuals with DM develop a foot ulcer (great toe or MTP areas are most common), and a significant subset will ultimately undergo amputation (14–24% risk with that ulcer or subsequent ulceration). Risk factors for foot ulcers or amputation include: male sex, diabetes >10 years’ duration, peripheral neuropathy, abnormal structure of foot (bony abnormalities, callus, thickened nails), peripheral arterial disease, smoking, history of previous ulcer or amputation, and poor glycemic control. Large callouses are often precursors to or overlie ulcerations.

Which of the following statements is true regarding fat embolism – (AJIMS NOV 05)
a)Most patients with major trauma involving long bones have urinary fat globules
b)All patients with urinary fat globules develop fat embolism
c)Peak incidence of respiratory insufficiency for pulmonary fat embolism is around day 7 after injury
d)Heparin as an anticoagulant decreases mortality and morbidity in fat embolism syndrome

Fat Embolism::- A certain degree of lung dysfunction occurs in all patients after long bone fractures, but clinically significant fat embolism syndrome as such develops in only 10 to 15 percent of these patients. Signs include hypoxia, tachycardia, mental status changes, and petechiae on the conjunctiva, axilla, or upper thorax. Fat globules in the urine are nondiagnostic, but lung infiltrates seen on chest radiograph confirm the presence of lung injury.
The pathophysiology of fat embolism represents capillary endothelial breakdown causing pericapillary hemorrhagic exudates most apparent in the lungs and brain. Pulmonary edema and hypoxemia occur as a result of pulmonary exudates. Hypoxia and areas of cerebral edema may account for the variable neurologic abnormalities seen.
The more severe cases of fat embolism involve fractures of the femur and tibia. Delays in fixation of bones and extensive reaming of the medullary canals contribute to perioperative morbidity and to the severity of fat embolism syndrome. Efforts to surgically correct fractures early and minimize trauma to the bone marrow lessen the degree of fat/bone marrow embolism. Patients with coexisting lung injury are at additional risk of fat embolism. Evidence suggests that fat may pass to the systemic circulation through a patent foramen ovale  or by transpulmonary passage.The chemical composition of the fat may even contribute to this process.  For this reason, it is preferable to minimize pulmonary artery hypertension to reduce transpulmonary passage of fat and limit pulmonary endothelial transudation of fluid.
Treatment includes early recognition, oxygen administration, and judicious fluid management. Corticosteroids in large doses shortly after major trauma have been found to minimize the clinical presentation of fat embolism but are probably not necessary in most cases if oxygen therapy is administered. With appropriate fluid management, adequate ventilation, and the prevention of hypoxemia, outcome is usually excellent.


Which of the following is true about varicocele except ? (Manipal 06)
a)Incompetent valves of testicular vein are responsible for varicocele
b)90% are on the left side
c)Asymptomatic cases require surgery
d)Femoral catheterization with spermatic vien ablation is done in recurrence

Which one of the following is the investigation of choice for suspected deep vein thrombosis of the lower extremity ? (UPSC 07)
a)Radioactive labelled fibrinogen uptake
b)Ascending contrast phlebography
c)D-dimer estimation
d)Duplex ultrasonography

With reference to varicocele, which one of the following is not true of it ? (UPSC 07)
a)Varicosity of cremastric veins
b)Left side is affected usually
c)Feels like a bag of worms
d)May lead to infertility


All are done for a case of deep vein thrombosis except – (MAHE 07)
a) Thrombolytic therapy b) Bandage
c) Heparin d) Bed rest

The practice of having a patient “out of bed into a chair” is one of the most thrombogenic positions that one could order a patient into. Sitting in a chair with the legs in a dependent position causes venous pooling, which in the postoperative milieu could easily be a predisposing factor in the development of thromboembolism

Treatment regimens may include antithrombotic therapy, vena caval interruption, catheter-directed or systemic thrombolytic therapy, and operative thrombectomy

studies, as well as the current ACCP guidelines, suggest that catheter-directed thrombolysis (with adjunctive angioplasty, venous stenting, and pharmacomechanical fragmentation and extraction) may be useful in selected patients with extensive iliofemoral DVT. Patients should have a recent onset of symptoms (<14 days), good functional status, decent life expectancy, and low bleeding risk.

Table 24-2 Risk Factors for Venous Thromboembolism


Acquired Inherited
Advanced age Factor V Leiden
Hospitalization/immobilization Prothrombin 20210A
Hormone replacement therapy and oral contraceptive use Antithrombin deficiency
Protein C deficiency
Pregnancy and puerperium Protein S deficiency
Prior venous thromboembolism Factor XI elevation
Malignancy Dysfibrinogenemia
Major surgery Mixed Etiology
Obesity Homocysteinemia
Nephrotic syndrome Factor VII, VIII, IX, XI elevation
Trauma or spinal cord injury Hyperfibrinogenemia
Long-haul travel (>6 h) Activated protein C resistance without factor V Leiden
Varicose veins  
Antiphospholipid antibody syndrome  
Myeloproliferative disease  
Polycythemia

Early in the course of DVT development, venous thrombosis is thought to begin in an area of relative stasis, such as a soleal sinus vein or immediately downstream of the cusps of a venous valve in the axial calf veins. Isolated proximal DVT without tibial vein thrombosis is unusual. Early in the course of a DVT, there may be no or few clinical findings such as pain or swelling. Even extensive DVT may sometimes be present without signs or symptoms. History and physical examination are therefore unreliable in the diagnosis of DVT. In addition, symptoms and signs generally associated with DVT, such as extremity pain and/or swelling, are nonspecific. In large studies, DVT has been found by venography or DUS in ≤50% of patients in whom it was clinically suspected.Objective studies are therefore required to confirm a diagnosis of DVT or to exclude the presence of DVT.

Investigation of Choice-Duplex USG

With major advances in technology of imaging, magnetic resonance venography has come to the forefront of imaging for proximal venous disease. The cost and the issue of patient tolerance due to claustrophobia limit the widespread application, but this is changing. It is a useful test for imaging the iliac veins and the IVC, an area where duplex ultrasound is limited in its usefulness.

Gold standard:-Injection of contrast material into the venous system is obviously and understandably the most accurate method of confirming DVT and the location.Not used usually.

Clinical symptoms may worsen as DVT propagates and involves the major proximal deep veins. Massive DVT that obliterates the major deep venous channel of the extremity with relative sparing of collateral veins causes a condition called phlegmasia alba dolens or white leg .This condition is characterized by pain, pitting edema, and blanching. There is no associated cyanosis. When the thrombosis extends to the collateral veins, massive fluid sequestration and more significant edema ensues, resulting in a condition known as phlegmasia cerulea dolens.Phlegmasia cerulea dolens is preceded by phlegmasia alba dolens in 50 to 60% of patients. The affected extremity in phlegmasia cerulea dolens is extremely painful, edematous, and cyanotic, and arterial insufficiency or compartment syndrome may be present. If the condition is left untreated, venous gangrene can ensue, leading to amputation

SVT

Superficial vein thrombophlebitis (SVT) most commonly occurs in varicose veins but can occur in normal veins. When SVT recurs at variable sites in normal superficial veins, it may signify a hidden visceral malignancy or a systemic disease such as a blood dyscrasia and/or a collagen vascular disease. This condition is known as thrombophlebitis migrans. SVT also frequently occurs as a complication of indwelling catheters, with or without associated extravasation of injected material. Upper extremity vein thrombosis has been reported to occur in 38% of patients with peripherally inserted central catheters; 57% of these developed in the cephalic vein . Finally, suppurative SVT may occur in veins with indwelling catheters and may be associated with generalized sepsis.

Rx of SVT by schwartz:- In patients with SVT not within 1 cm of the saphenofemoral junction, treatment consists of compression and administration of an anti-inflammatory medication such as indomethacin. In patients with suppurative SVT, removal of any existing indwelling catheters is mandatory, and excision of the vein may be necessary. If the SVT extends proximally to within 1 cm of the saphenofemoral junction, extension into the common femoral vein is more likely to occur. In these patients, anticoagulation therapy for 6 weeks and GSV ligation appear equally effective in preventing thrombus extension into the deep venous system.

Rx of SVT by Harrisons:- Treatment is primarily supportive. Initially, patients can be placed at bed rest with leg elevation and application of warm compresses. Nonsteroidal anti-inflammatory drugs may provide analgesia but may also obscure clinical evidence of thrombus propagation. If a thrombosis of the greater saphenous vein develops in the thigh and extends toward the saphenofemoral vein junction, it is reasonable to consider anticoagulant therapy to prevent extension of the thrombus into the deep system and a possible pulmonary embolism.

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Elastic compression stocking with zippered side to facilitate treatment of chronic venous insufficiency

Compression therapy is most commonly achieved with graduated elastic compression stockings. Graduated elastic compression stockings, initially developed by Conrad Jobst in the 1950s, were made to simulate the gradient of hydrostatic forces exerted by water in a swimming pool. Elastic compression stockings are available in various compositions, strengths, and lengths, and can be customized for a particular patient.

To improve compliance, patients should be instructed to wear their stockings initially only as long as it is easily tolerated and then gradually to increase the amount of time the stockings are worn. Alternatively, patients can be fitted with lower-strength stockings initially followed by introduction of higher-strength stockings over a period of several weeks. Many commercially available devices, such as silk inner toe liners, stockings with zippered sides,and metal fitting aids ,are available to assist patients in applying elastic stockings.

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Metal fitting aid to assist in placement of elastic compression stockings

Lymphatic Disorders

Lymphedema is extremity swelling that results from a reduction in lymphatic transport, with resultant pooling of lymph within the interstitial space. It is caused by anatomic problems such as lymphatic hypoplasia, functional insufficiency, or absence of lymphatic valves.

The original classification system, described by Allen, is based on the cause of the lymphedema.

Primary lymphedema is further subdivided into

1. Congenital lymphedema may involve a single lower extremity, multiple limbs, the genitalia, or the face. The edema typically develops before 2 years of age and may be associated with specific hereditary syndromes (Turner syndrome, Milroy syndrome, Klippel-Trénaunay-Weber syndrome).The familial version of congenital lymphedema is known as Milroy’s disease and is inherited as a dominant trait

2.Lymphedema praecox is the most common form of primary lymphedema, accounting for 94% of cases. Lymphedema praecox is far more common in women, with the gender ratio favoring women 10:1. The onset is during childhood or the teenage years, and the swelling involves the foot and calf. The familial version of lymphedema praecox is known as Meige’s disease.

3.Lymphedema tarda is uncommon, accounting for <10% of cases of primary lymphedema. The onset of edema is after 35 years of age.

Secondary lymphedema is far more common than primary lymphedema. Secondary lymphedema develops as a result of lymphatic obstruction or disruption. Axillary node dissection leading to lymphedema of the arm is the most common cause of secondary lymphedema in the United States. Other causes of secondary lymphedema include radiation therapy, trauma, infection, and malignancy. Globally, filariasis (caused by Wuchereria bancrofti, Brugia malayi, and Brugia timori) is the most common cause of secondary lymphedema.In developed countries, the most common causes of secondary lymphedema involve resection or ablation of regional lymph nodes by surgery, radiation therapy, tumor invasion, direct trauma, or less commonly, an infectious process.

Lymphoscintigraphy has emerged as the test of choice in patients with suspected lymphedema.It cannot differentiate between primary and secondary lymphedemas; however, it has a sensitivity of 70% to 90% and a specificity of nearly 100% in differentiating lymphedema from other causes of limb swelling.

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Malignant cell in Hodgkin’s lymphoma is –

a) Reed sternberg cell b) Lymphocytes 85)
c) Histiocyte d) Reticulum cells

Chronic lymphedema predisposes to all except – (PGI 89)
a) Lymphangiosarcoma b) Marjolins ulcer
c) Recurrent infections d) Thickening of skin
In the lower extremity the swelling involves the dorsum of the foot, and the toes have a squared-off appearance. In advanced cases, hyperkeratosis of the skin develops, and fluid weeps from lymph-filled vesicles

Recurrent cellulitis is a common complication of lymphedema. Repeated infection results in further lymphatic damage, worsening existing disease. The clinical presentation of cellulitis ranges from subtle erythema and worsening of edema to a rapidly progressive soft tissue infection with systemic toxicity

Commonest cause of unilareral pedal edema in india is – (A190)
a) Filariasis b) Post traumatic
c) Post irradiation d) Milroy’s disease

All are true about congenital lymphedema except-
a)It is bilateral (AI 91)
b)Involve lower limb
c)Almost always manifests before puberty
d)Acute lymphangitis may occur
All are true?

The commonest cause for lymphedema of upper limb is – (AI 91)
a) Filariasis b) Congenital
c) Neck surgery d) Post mastectomy irradiation

Commonest cause of upper limb lymphedema is –
a) Congenital b) Filariasis (AI 92)
c) Post mastectomy d) Irradiation

???

ANS given in all guides is Filariasis but it should be Post Mastectomy.

Secondary lymphedema, more common than the primary form, usually develops following disruption or obstruction of lymphatic pathways associated with a disease process, or following surgery or radiotherapy. Worldwide, filariasis is the most common cause of secondary lymphedema usually affecting lower limbs.In the United States, the most common secondary lymphedema develops in the upper extremity following axillary lymph node dissection.The incidence varies considerably, depending on the definition of edema. Results of one series of published reports reveal a 14 percent rate of secondary lymphedema in postmastectomy patients who also had undergone irradiation therapy.

Milroys disease is – (JIPMER 92)
a)Edema due to filareasis
b)Post cellulitic lymphedema
c)Congenital lymphedema
d)Lymphedema following surgery

Investigation of choice in detecting small para-aortic lymph node is – (JIPMER 92)
a) Ultra sound scan b) CT scan
c) Lymphangiography d) Arteriography

Not Sure

Contrast lymphangiography. Although few centres now perform this technique, it remains the standard by which all other lymphatic imaging is judged and provides precise information about the anatomy of the lymphatic system. It is now generally reserved for preoperative evaluation of patients with megalymphatics who arc being considered for bypass or fistula ligation.

CT scanning may be useful in identifying pathologic intra-abdominal lymph nodes and masses and in identifying the extent and localization of fluid. Lymphangiography and lymphoscintigraphy may help localize lymph leaks and obstruction; this information is particularly useful for surgical planning.

Milroys disease is lymphedema which is-(AMU 85)
a)Familial
b)Follows filariasis
c)Follows erysipelas
d)A sequele to white leg

Lymphangiography of the leg is performed by –
a)An injection of sodium diatrizoate (Hypaque) subcutaneously between the toes
b)Injecting sodium diatrizoate retrogradely under pressure into a small vein on the dorsum of the foot
c)Dissecting lymphatics through an incision on the dorsum of the foot
d)The use of an infusion pump

Direct-contrast lymphangiography provides the finest details of the lymphatic anatomy. However, it is an invasive study that involves exposure and cannulation of lymphatics at the dorsum of the forefoot, followed by slow injection of contrast medium (ethiodized oil).

Radiologic lymphology is performed by first visualizing the lymphatics by injecting colored dye into the hand or foot. The visualized lymphatic segment is exposed through a small incision and cannulated with a 27- to 30-gauge needle. An oil-based dye is then injected slowly into the lymphatics over several hours. The lymphatic channels and nodes are then visualized with traditional radiographs . Lymphangiography is reserved for patients with lymphangiectasia or lymphatic fistulas, and patients who are being considered for microvascular reconstruction

Under local anaesthesia, a small transverse incision is made in the dorsum of the foot after I ml of isosulphan blue has been injected subcutaneously to identify the lymphatics. Lymphatics are dissected out under loupe magnification and a 30G needle used to infuse lipid-soluble contrast at a rate of I ml in 8 minutes to a maximum of 7 ml (taking about 1 hour) into each limb

Finding the cause of unilateral lympoedema of the leg includes – (JIPMER 78,79, PGI 85)
a)Taking a family history
b)Looking for chronic infection in the foot
c)Looking for early malignant disease of the testis…(Not early.It should have been late metastatic )
d)Looking for filariasis
e)Performing a casoni

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Treatment of Acute lymphangitis requires –
a)Antibiotic and rest (JIPMER 81, AMC 84)
b)Immediate lymphangiography
c)Immediate multiple incisions
d)No special treatment

Acute inflammation of the Iymphatics
Acute lymphangitis occurs when a deep or superficial infec­tion, often due to Streptococcus pyogenes or Staphylococcus aureus, spreads to the draining lymphatics and lymph nodes (lymphadenitis) where an abscess may form. Eventually this may progress to bacteraemia or septicaemia. The normal signs of infection (rubor, calor, dolor) are present and a red streak is seen in the skin along the line of the inflamed lymphatic. The part should be rested to reduce lymphatic drainage, elevated to reduce swelling and the patient treated with intravenous antibiotics based upon actual or suspected sensitivities. Failure to improve within 48 hours suggests inappropriate antibiotic therapy, the presence of undrained pus either in the lymph nodes or at the site of primary infection, or the presence of an underlying systemic disorder (malignancy, immunodeficiency). The lymphatic damage caused by acute lymphangitis may lead to recurrent attacks of infection and lymphoedema.
image


Total dose of radiation in Hodgkins dosease is – (JIPMER 95)
a) 500 -1000 rad b) 1000 – 2000 rad
c) 3000 – 5000 rad d) 5000 – 7000 rad

The most important prognostic indicator of Hodgkin’s lymphoma is – (TN 95)
a)Lymphocytic predominance histology
b)Visceral involvement
c)Hepatic involvement
d)Involvement of spleen

Diagnosis of Hodgkin’s disease is.confirmed by –
a)CT scan (PGI 9 7)
b)Bone marrow biopsy
c)Lymph node biopsy
d)Lymphangiography

Grade I lymphedema means – (JIPMER 2K)
a)Pitting edema upto the ankle
b)Pitting edema upto the knee
c)Non-pitting edema
d)Edema disapearing after overnight rest

image

Lymphovenous anastomosis is done for – (PGI 97)
a)Filarial lymphoedema
b)Lymphoid cyst
c)Cystic hygroma
d)Malignant lymphoedema

Surgery

A variety of surgical procedures have been devised for the treatment of lymphedema. Surgical treatment involves either excision of extra tissue or anastomosis of a lymphatic vessel to another lymphatic or vein.125 In excisional procedures, part or all of the edematous tissue is removed. This does not improve lymphatic drainage but debulks redundant tissue. The microsurgical procedures involve the creation of a lymphaticolymphatic or lymphaticovenous anastomosis, which theoretically improves lymphatic drainage. No long-term follow-up data are available for these interventions, and therefore operative therapy for lymphedema is not well accepted worldwide. Furthermore, operative intervention can further obliterate lymphatic channels, worsening the edema.126

Summary

Lymphedema is a chronic condition caused by ineffective lymphatic transport, which results in edema and skin damage. Lymphedema is not curable, but the symptoms can be controlled with a combination of elastic compression stockings, limb elevation, pneumatic compression, and massage. Controlling the edema protects the skin and potentially prevents cellulitis

True about lymphangioma – (PGI 03)
a)It is a malignant tumour
b)It is a congenital sequestration of lymphatic
c)Cystic hygroma is a lymphangioma

d)Laser excision is done
e)Sclerotherapy is commonly done

The most common site of lymphangiosarcoma is
a)Liver (UPSC 04)
b)Spleen
c)Post mastectomy edema of arm
d)Retroperitoenum

Commonest cause of A/C Lymphadenitis in India –
a)Barefoot walking (MAHE 05)
b)TB
c)Staphylococcal skin infection
d)Lymphoma

All of the following soft tissue sarcomas have a propensity for lymphatic spread except –
a)Neurofibrosarcoma (AiimsNov 05)
b)Synovial sarcoma
c)Rhabdomyosarcoma
d)Epitheloid sarcoma

A 40 year old man presented with a flat 1 cm x 1 cm scaly, itchy black mole on the front of thigh. Examination did reveal any inguinal lymphadenopathy. The best course of management would be- (UPSC 07)
a)FNAC of the lesion
b)Incision biopsy
c)Excisional biopsy
d)Wide excision with inguinal lymphadenectomy

In India, what is the most common cause of unilateral lymphoedema of lower limb ? (UPSC 07)
a)Lymphoedema tarda
b)Carcinoma of penis with metastatic nodes
c)Filariasis
d)Tubercular lymphadenopathy

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Surgery MCQs (Burns)

Posted by Dr KAMAL DEEP on May 30, 2011

Exposure treatment is done for burns of the –
a)Upper limb (JIPMER 87)
b)Lower limbs
c)Thorax
d)Abdomen
e)Head & neck

Circumferential (encircling) burns of the trunk are generally unsuited for exposure because all of the burned surfaces cannot be adequately exposed to the air at one time.

Granulating surfaces should never be exposed.


Rule of nine to estimate surface area of a burnt patient was introduced by – (AIIMS 84)
a) Mortiz kaposi b) Alexander wallace
c) Joseph lister d) Thomas barclay

Deep skin burns is treated with – (AIIMS 91)
a)Split thickness graft
b)Full thickness graft
c)Amniotic membrane
d)Synthetic skin derivatives

In burns heat loss is by/ due to – (PGI 80,
a)Dilatation of veins DELHI 80,92)
b)Shock
c)Exposed area by evaporation
d)None of the above

The cold water treatment of burns has the disadvantage that it increase the chances of –
a) Pain b) Exudation (PGI 81, AIIMS 83)
c) Infection d) None of the above

Pus in burns form in – (PGI 79, DELHI 89)
a) 2-3 Days b) 3-5 days
c) 2-3 weeks d) 4

One of folowing is not seen in severe burns -(Al 96)
a) Hypovolemia b) Sepsis
c) Duodenal ulcer d) Hyperthemia

Undue restlessness in a patient during the immediate post burn period is often a manifestitation of-(Karp
a) Hypoxia b) Hypovolemia 95)
c) Hyperkalemia d) Anxiety

 

image

Sabiston:- First-degree burns are, by definition, injuries confined to the epidermis. These burns are painful and erythematous, blanch to the touch, and have an intact epidermal barrier. Examples include sunburn or a minor scald from a kitchen accident. First-degree burns do not result in scarring, and treatment is aimed at comfort with the use of topical soothing salves, with or without aloe, and oral nonsteroidal anti-inflammatory agents.

Second-degree burns are divided into two types: superficial and deep. All second-degree burns have some degree of dermal damage, and the distinction is based on the depth of injury into this structure. Superficial dermal burns are erythematous and painful, blanch to touch, and often blister. Examples include scald injuries from overheated bathtub water and flash flame burns from open carburetors. These wounds spontaneously re-epithelialize from retained epidermal structures in the rete ridges, hair follicles, and sweat glands in 7 to 14 days. After healing, these burns may result in some slight skin discoloration over the long term. Deep dermal burns into the reticular dermis appear more pale and mottled, do not blanch to touch, but remain painful to pinprick. These burns heal in 14 to 35 days by re-epithelialization from hair follicles and sweat gland keratinocytes, often with severe scarring as a result of the loss of dermis

Third-degree burns are full thickness through the epidermis and dermis and are characterized by a hard, leathery eschar that is painless and black, white, or cherry red. No epidermal or dermal appendages remain; thus, these wounds must heal by re-epithelialization from the wound edges. Deep dermal and full-thickness burns require excision with skin grafting to heal the wounds in timely fashion.

Fourth-degree burns involve other organs beneath the skin, such as muscle, bone, and brain.

Schwartz:- Burn wounds are commonly classified as superficial (first degree), partial thickness (second degree), full thickness (third degree), and fourth-degree burns, which affect underlying soft tissue. Partial-thickness burns are then classified as either superficial or deep partial thickness burns by depth of involved dermis. Clinically, first-degree burns are painful but do not blister, second-degree burns have dermal involvement and are extremely painful with weeping and blisters, and third-degree burns are hard, painless, and nonblanching

Because full-thickness grafts are impractical for most burn wounds, split-thickness sheet autografts harvested with a power dermatome make the most durable wound coverings and have a decent cosmetic appearance.

Schwartz:- Thighs make convenient anatomic donor sites, which are easily harvested and relatively hidden from an aesthetic standpoint. The thicker skin of the back is useful in older patients, who have thinner skin elsewhere and may have difficulty healing donor sites. The buttocks are an excellent donor site in infants and toddlers.

The scalp is also an excellent donor site; the skin is thick and there are many hair follicles so it heals quickly. It has the added advantage of being completely hidden once hair regrows.

Areas of cosmetic importance such as the face, neck, and hands should be grafted with nonmeshed sheet grafts to ensure optimal appearance.

 

All requires hospitalization except – (Al 91)
a)5% Burns in children
b)10% Scalds in children
c)Electrocution
d)15% Deep burns in adults

Indications for specialist referral in burns –
a)> 20% superficial burn in adult (PGI 04)
b)Only palms
c)Scalds on head and face
d)10% burns in infants
e)10% deep burns in adult

A burn patient is referred when – (PGI 04)
a)10% superficial burn in child
b)Scald in face

c)25% superficial burn in adult
d)25% deep burn in adult
e)Burn in palm

Improvements in burn care originated in specialized units specifically dedicated to the care of burned patients. These units consist of experienced personnel with resources to maximize outcome from these devastating injuries ( Box 22-1 ). Because of these specialized resources, burned patients are best treated in such places. Patients with the following criteria are referred to a designated burn center:

1. Partial-thickness burns greater than 10% TBSA
2. Burns involving the face, hands, feet, genitalia, perineum, or major joints
3. Any full-thickness burn
4. Electrical burns, including lightning injury
5. Chemical burns
6. Inhalation injury
7. Burns in patients with preexisting medical disorders that could complicate management, prolong recovery, or affect outcome
8. Any patient with burns and concomitant trauma (e.g., fractures) in which the burn injury poses the greater immediate risk for morbidity and mortality. In such cases, if the trauma poses the greater immediate risk, the patient may be initially stabilized in a trauma center before being transferred to a burn unit. Physician judgment is necessary in such situations, and decisions must be made in concert with the regional medical control plan and triage protocols
9. Burned children in hospitals without qualified personnel or equipment to care for children
10. Burns in patients who will require special social, emotional, or long-term rehabilitative intervention


In 3’rd degree burns, all are seen except – (PGI 99)
a)Vesicles are absent
b)Painful
c)Leathery skin
d)Reddish due to Hb Infiltration

Late deaths in burns is due to – (PGI 99)
a) Sepsis b) Hypovolemia
c) Contractures d) Neurogenic

Burns with vesiculation, destruction of the epidermis and upper dermis is – (PGI 99)
a) 1″ degree b) 2nd degree
c) 3rd degree d) 4th degree

True about burns – (PGI 2000)
a)Hyperglycemia is seen in early burns
b)Child with burns should have damp dressing
c)Chemical powder burns should be kept dry
d)3rd degree burns are painfull

Metabolic derangements in severe burns are all except- (PGI 2000)
a)cortico steroid secretion
b)Hyperglycaemia
c)secretion of HCl
d)Neutrophil dysfunction

Superficial burns; true is/are – (PGI 01)
a)Always requires skin grafting
b)Dry & inelastic
c)Blister formation
d)Painless
e)Can be healed within 7 to 10 days

Schwartz:- Clinically, first-degree burns are painful but do not blister, second-degree burns have dermal involvement and are extremely painful with weeping and blisters, and third-degree burns are hard, painless, and nonblanching

Love and Bailey:-Superficial burns These have the ability to heal themselves by epithelialisation alone. Epidermal burns look red, are painful, blisters are not present, and they heal rapidly without sequelae. Superficial dermal burns are blistered and painful; they should heal by epithelialisation within 14 days without scarring, but some­times leave long-term pigmentation changes.burns heal in 14 to 35 days

Hence superficial burns include first degree as well as second degree superficial ones with superficial dermis involvement.


True statement about burn resuscitation -(PGI 03)
a)Colloid preferred in initial 24 hrs
b)Colloid preferred if burnt area is > 15 % of total BSA
c)Half of the calculated fluid given in initial 8 hrs.
d)Diuretics should be given to all pt of electric burn.

 

The ideal temperature of water to cool the burnt surface is – (UPSC 02)
a) 15° b) 10°
c) 8° d) 6°

The best guide to adequate tissue perfusion in the fluid management of a patient with burns, is to ensure a minimum hourly urine output of- (Karn a) 10-30 ml b) 30-50 ml 04)
c) 50-70 ml d) 70-100 ml

Bailey:- Fluid resuscitation:- It is important at an early stage to secure large-bore intra­venous lines. Samples are taken for haemoglobin, urea and electrolytes, and blood cross-matching. Blood gases and blood analysis for carbon monoxide or cyanide poisoning are required in the unconscious patient. Having estimated the percentage burned surface area and measured the body weight, initial fluid resuscitation can be planned. The simplest formula (for adults) is: 3—4 ml/kg body weight/% burn/in the first 24 hours.Half of this volume is given in the first 8 hours and the rest in the next 16 hours. Timings begin from the time of the burn, not the start of resuscitation. Hartmann solution is preferred, but other isotonic fluids may be used. Metabolic fluid requirements are also needed. Formulae are only a guide and the adequacy of fluid resuscitation is monitored by regular clinical assessment. A urinary catheter is essential. Urine output is the best guide to adequate tissue perfusion; in an adult one should aim for 30—50 ml/hour.

Schwartz:- As in any critically ill patient, the target MAP is 60 mmHg to ensure optimal end-organ perfusion. Goals for urine output should be 30 mL/h in adults and 1 to 1.5 mL/kg per hour in pediatric patients. Because blood pressure and urine output may not correlate perfectly with true tissue perfusion, the search continues for other adjunctive parameters that may more accurately reflect adequate resuscitation. Some centers have found serum lactate to be a better predictor of mortality in severe burns; others have found that base deficit may be a better predictor of eventual organ dysfunction and mortality. Burned patients with normal blood pressures and serum lactate levels may still have compromised gastric mucosal blood flow. However, continuous measurement of gastric mucosal pH is logistically difficult and has not been widely implemented.

A third degree cirumferential burn in the arm and forearm region, which of the following is most important for monitoring – (U.P.P.GM.E.E. 04)
a)Blood gases
b)Carboxy-oxygen level
c)Macroglobiunria cryoglobinuria
d)Peripheral pulse and circulation

In 3″ degree burns, all are seen except –
a)Vesicles are absent (UPPGMEE 04)
b)Painful
c)Leathery skin
d)Reddish due to Hb infiltration

IV rules for burns – (MAHE 05)
a)% body surface area X weight in pounds X 4 = Volume in ml
b)% body surface area X weight in Kgs X 4 = Volume in Lts
c)% body surface area X weight in Kgs X 5 = Volume in ml
d)% body surface area X weight in Kgs X 4 = Volume in ml

Ans. is ‘d’ i.e., % body surface area X weight in Kgs [Ref : Bailey & Love 24th/e p. 272] X 4 = Volume in ml

A myriad of formulas exist for calculating fluid needs during burn resuscitation, suggesting that no one formula benefits all patients. The most commonly used formula, the Parkland or Baxter formula, consists of 3 to 4 mL/kg per percent burned of lactated Ringer’s, of which half is given during the first 8 hours postburn, and the remaining half over the subsequent 16 hours. The concept behind the continuous fluid needs are simple. The burn (and/or inhalation injury) drives an inflammatory response that leads to capillary leak; as the plasma leaks into the extravascular space, crystalloid administration maintains the intravascular volume. Therefore, if a patient receives a large fluid bolus in a prehospital setting or emergency department, that fluid has likely leaked into the interstitium and the patient will still require ongoing burn resuscitation, according to the estimates.

In a patient with the burn wound extending into the superficial epidermis without involving the dermis would present with all of the following EXCEPT –
a)Healing of the wound (SGPGI 05) spontaneously without scar formation
b)Anaesthesia at the site of burns
c)Blister formation
d)Painful

What is the most important aspect of management of burn injury in the first 24 hours ? (UPSC 07)
a) Fluid resuscitation b) Dressing
c) Escharotomy d) Antibiotics

The initial colonization of a burn is by which micro organisms – (JIPMER 80, UPSC 87)
a) Proteus b) Pseudomonas
c) Staphylococcus d) E. coli

Cardiac arrest, ECG changes occurs in – (UP 07)
a) Thermal burn b) Electrical burn
c) Cold burn d) Ionising radiation injury

Stress ulcers seen in burns are – (PGI 2000)
a) Curling’s ulcer b) Cushing’s ulcer
c) Meleney’s ulcer d) Rodent ulcer

‘Sterile needle test’ helps in differentiating –
a)Healing proces (JIPMER 81, AIIMS 86 )
b)Depth of burns
c)Degenerative proces
d)Infection

Which of the following is not true of Curling’s ulcer – (KA RNAT 96)
a)Seen in burned patients
b)Are solitary penetrating ulcer
c)Are shallow multiple erosions
d)Has also been described in children after head injury or craniotomy

An intern was doing saphenous cannulation for a burns pareint. Then the jpatient developed sudden onset of pain along the medial border of the correponding foot. Which nerve must have been accidentally ligated – (AIIMS 2K)
a) Sural nerve b) Deep peroneal nerve
c) Saphenous nerve d) Genicular nerve

Head & neck involvement in burns in infant is –
a) 9% b) 18% (PGI 2000)
c) 27% d) 32%

its 21%

An adult whose both lower limbs are charred along with genitalia has – – – -burns -(PGI 80, AIIMS 84)
a) 18% b) 19%
c) 36% d) 37%

Calculate the percentage of burns on the head, neck and face in a child of one year – (Al.. 88)
a) 10% b) 16%
c) 13% d) 15%…..NONE

Children have a relatively larger proportion of body surface area in their head and neck, which is compensated for by a relatively smaller surface area in the lower extremities. Infants have 21% of TBSA in the head and neck and 13% in each leg, which incrementally approaches the adult proportions with increasing age. The Berkow formula is used to accurately determine burn size in children

Berkow Diagram to Estimate Burn Size (%) Based on Area of Burn in an Isolated Body Part[*]
BODY PART 0-1 yr 1-4 yr 5-9 yr 10-14 yr 15-18 yr ADULT
Head 19 17 13 11 9 7
Neck 2 2 2 2 2 2
Anterior trunk 13 13 13 13 13 13
Posterior trunk 13 13 13 13 13 13
Right buttock 2.5 2.5 2.5 2.5 2.5 2.5
Left buttock 2.5 2.5 2.5 2.5 2.5 2.5
Genitalia 1 1 1 1 1 1
Right upper arm 4 4 4 4 4 4
Left upper arm 4 4 4 4 4 4
Right lower arm 3 3 3 3 3 3
Left lower arm 3 3 3 3 3 3
Right hand 2.5 2.5 2.5 2.5 2.5 2.5
Left hand 2.5 2.5 2.5 2.5 2.5 2.5
Right thigh 5.5 6.5 8 8.5 9 9.5
Left thigh 5.5 6.5 8 8.5 9 9.5
Right leg 5 5 5.5 6 6.5 7
Left leg 5 5 5.5 6 6.5 7
Right foot 3.5 3.5 3.5 3.5 3.5 3.5
Left foot 3.5 3.5 3.5 3.5 3.5 3.5
* Estimates are made, recorded, and then summed to gain an accurate estimate of the body surface area burned.

imageimagerule of 9

Sabiston                                                                                                       Schwartz                                                                                                               Love & Bailey

Schwartz has made the Rule of 9 depiction wrong by giving front and back of lower limb 18% each while its only 9% only.

Determination of burn size estimates the extent of injury. Burn size is generally assessed by the so-called rule of nines .In adults, each upper extremity and the head and neck are 9% of TBSA, the lower extremities and the anterior and posterior aspects of the trunk are 18% each, and the perineum and genitalia are assumed to be 1% of TBSA. Another method of estimating smaller burns is to consider the area of the open hand (including the palm and extended fingers) of the patient to be approximately 1% of TBSA and then transpose that measurement visually onto the wound for a determination of its size. This method is helpful when evaluating splash burns and other burns of mixed distribution.

Rule of Nines

Assessment of the burn area
An approximate clinical rule in wide use is the ‘rule of nines’ which acts as a rough guide to body surface area (Fig. 14.1). The examining doctor should assess the total area involved and how much of the area is partial thickness and how much full thickness. As a general rule, an adult with more than 20 per cent of the body surface involved or a child with more than 10 per cent of body surface area involved will require intravenous fluid replacement. However, an intravenous access line may be necessary for adequate analgesia for much smaller areas of burn and many children in particular will require fluid replacement because of vomiting. For smaller percentages than the above, it is necessary to maintain an adequate oral intake of fluid. The prognosis depends upon the percentage body surface area burned. A rough guide is that if the age and percentage add together to a score of 100 then the burn is likely to be fatal. A child may therefore survive a large burn, but even a small burn in an elderly patient is potentially fatal.
Intravenous access in a burnt child may be difficult. Both rectal and intraosseous infusion (into the upper third of the tibia) offer useful alternatives

 

Generalised diffuse peritonitis has been compared to second and third degree burns of- (AIMS 84)
a) 13% b) 30 %
c) 45% d) 60 %

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Surgery MCQs (Grafts)

Posted by Dr KAMAL DEEP on May 27, 2011

Grafts:-

 Skin grafting dates back >3000 years to India, where forms of the technique were used to resurface nasal defects in thieves who were punished for their crimes with nose amputation.

 

Full thickness skin graft can be taken from the following sites except – (AIIMS 87)  ?
a) Elbow b) Back to neck
c) Supraclavicular area d) Upper eyelids

Free skin graft is rejected on – (AIMS 89)  ?
a) Muscle b) Fat
c) Deep fascia d) Dermis

Skin graft for facial wounds is taken from – (AIIMS 92)
a) Medial aspect of thigh b) Cubital fossia
c) Groin d) Post auricular region

The best skin graft for open wounds is – (A193)
a) Isograft b) Homograft
c) Allograft d) Autograft

The organism causing destruction of skin grafts is – (PGI 95)
a) Streptococcus b) Staphylococcus
c) Pseudomonas d) Clostridium

For on open wound of leg with exposure of bone, treatmen of choice – (AIIMS 96)
a) Partial skin graft b) Complete skin graft
c) Pedicle graft d) Reverdin graft

(Reverdin is credited with performing the first "fresh skin" allograft, and in 1869 while working in Paris, introduced the "pinch graft", which is a procedure for removing tiny pieces of skin from a healthy area of the body and seeding them in a location that needs to be covered. This procedure is sometimes referred to as a "Reverdin graft". His name is also associated with the "Reverdin suture needle", which is a specialized surgical needle.)

Graft is not taken up on the following-(AIIMS 96)
a) Fat b) Muscle
c) Deep fascia d) Skull bone

Man sustained an injury with loss of skin cover exposing bone of 10×10 cms. The best treatment is –
a)Full thickness graft (AIIMS 99)
b)Pedicle graft
c)Amnion
d)Split thickness skin graft

Skin graft survival in the first 48 hrs is dependent on – (AIIMS 99)
a)Random connection between
host & donor capillaries
b)Plasmatic imbibition
c)Saline in dressing
d)Development of new blood vessels

Skin grafting is not done in infection with-(MP 2K)
a)Pseudonmonas aeroginosa
b)Staph. Aureus
c)Beta hemolytic streptococci
d)E. coli

Split skin graft can be applied over – (PGI 99)
a) Muscle b) Bone
c) Cartilage d) Eyelid

Best procedure to be done after an injury to leg associated with exposure of underlying bone and skin loss – (MAHA 05)
a) Pedicle flap b) Split skin grafting
c) Full thickness grafting d) Skin flap

Dacron vascular graft is – (Al 06)
a) Nontextile synthetic b) Textile synthetic
c) Nontextile biologic d) Textile biologic

Which one of the following statements about Mesh Skin Grafts is not correct? – (UPSC 06)
a)They permit coverage of large areas -True
b)They allow egrees of fluid collections under the graft) -True
c)They contract to the same degree as a grafted sheet of skin
d)They "take" satisfactorily on a granulating bed

Split skin grafts in young children should be harvested from – (UPSC 07)
a) Buttocks b) Thigh
c) Trunk d) Upper limb

Wolfe grafts is – (UP 07)
a)Full thickness -skin grafts
b)Partial thickness skin grafts
c)Split-skin grafts
d)Pedicled flap

Deep skin burns is treated with – (AIIMS 91)
a)Split thickness graft
b)Full thickness graft
c)Amniotic membrane
d)Synthetic skin derivatives

For aortic graft the best material available is – (JIPMER 81, Delhi 79, 92)
a) Dacron b) Artery
c) Vein d) None

A knitted Dacron artery graft (PGI 99, AIIMS 84)
a)Is not porous
b)Is eventually dissolived by tissue reaction
c)Never gets infected
d)Can be easily incised and the opening resutured

Not used as graft material in peripheral vascular disease – (PGI 97)
a) Dacron graft b) Vein
c) PTFE d) PVC

Graft used in infra inguinal by pass is 4Jipmer 2K)
a) PTFE b) Dacron
c) Autologous vein d) Autologous artery

Most common artery used for coronary artery bypass graft is – (Rohtak 97)
a) Int. Mammary artery b) Intercostal artery
c) Radial artery d) Dorsalis pedisartery
e)Brachial artery

 

Skin Grafts and Skin Substitutes

Discussion of skin grafting requires a basic review of skin anatomy. Skin is comprised of 5% epidermis and 95% dermis. The dermis contains sebaceous glands, whereas sweat glands and hair follicles are located in the subcutaneous tissue. The dermal thickness and concentration of skin appendages vary widely from one location to another on the body. The skin vasculature is superficial to the superficial fascial system and parallels the skin surface. The cutaneous vessels branch at right angles to penetrate subcutaneous tissue and arborize in the dermis, finally forming capillary tufts between dermal papillae.4

Each technique has advantages and disadvantages. Selection of a particular technique depends on the requirements of the defect to be reconstructed, the quality of the recipient bed, and the availability of donor site tissue.

Type Description Thickness (in)
Split thickness Thin (Thiersch-Ollier) 0.006–0.012
  Intermediate (Blair-Brown) 0.012–0.018
  Thick (Padgett) 0.018–0.024
Full thickness Entire dermis (Wolfe-Krause) Variable
Composite tissue Full-thickness skin with additional tissue (subcutaneous fat, cartilage, muscle) Variable

Split-Thickness Grafts

Split-thickness skin grafting represents the simplest method of superficial reconstruction in plastic surgery. Many of the characteristics of a split-thickness graft are determined by the amount of dermis present. Less dermis translates into less primary contraction (the degree to which a graft shrinks in dimensions after harvesting and before grafting), more secondary contraction (the degree to which a graft contracts during healing), and better chance of graft survival. Thin-split grafts have low primary contraction, high secondary contraction, and high reliability of graft take, often even in imperfect recipient beds. Thin grafts, however, tend to heal with abnormal pigmentation and poor durability compared with thick-split grafts and full-thickness grafts. Thick-split grafts have more primary contraction, show less secondary contraction, and may take less hardily. Split grafts may be meshed to expand the surface area that can be covered. This technique is particularly useful when a large area must be resurfaced, as in major burns. Meshed grafts usually also have enhanced reliability of engraftment, because the fenestrations allow for egress of wound fluid and excellent contour matching of the wound bed by the graft. The fenestrations in meshed grafts re-epithelialize by secondary intention from the surrounding graft skin. The major drawbacks of meshed grafts are poor cosmetic appearance and high secondary contraction. Meshing ratios used usually range from 1:1.5 to 1:6, with higher ratios associated with magnified drawbacks.

Full-Thickness Grafts

By definition full-thickness skin grafts include the epidermis and the complete layer of dermis from the donor skin. The subcutaneous tissue is carefully removed from the deep surface of the dermis to maximize the potential for engraftment. Full-thickness grafts are associated with the least secondary contraction upon healing, the best cosmetic appearance, and the highest durability. Because of this, they are frequently used in reconstructing superficial wounds of the face and the hands. These grafts require pristine, well-vascularized recipient beds without bacterial colonization, previous irradiation, or atrophic wound tissue.

Graft Take:- Differences in Schwartz and Sabiston

Graft Take

Schwartz:- Skin graft take occurs in three phases, imbibition, inosculation, and revascularization. Plasmatic imbibition refers to the first 24 to 48 hours after skin grafting, during which time a thin film of fibrin and plasma separates the graft from the underlying wound bed. It remains controversial whether this film provides nutrients and oxygen to the graft or merely a moist environment to maintain the ischemic cells temporarily until a vascular supply is re-established. After 48 hours a fine vascular network begins to form within the fibrin layer. These new capillary buds interface with the deep surface of the dermis and allow for transfer of some nutrients and oxygen. This phase, called inosculation, transitions into revascularization, the process by which new blood vessels either directly invade the graft or anastomose to open dermal vascular channels and restore the pink hue of skin. These phases are generally complete by 4 to 5 days after graft placement. During these initial few days the graft is most susceptible to deleterious factors such as infection, mechanical shear forces, and hematoma or seroma

Special considerations in choosing a skin graft donor site include skin quality and color from the donor region that will best match the recipient site. For example, skin harvested from the blush zone above the clavicles is best suited for facial grafting. Skin grafts harvested from areas caudal to the waist will result in tallow discoloration and possible unwanted hair growth. Because split-thickness donor sites will permanently scar, it is wise to choose a donor site that can be concealed. When a large amount of graft is needed, the thighs and buttocks are areas that can be hidden with everyday clothes. The inner arm and groin crease are each fine sources for full-thickness grafts because both areas offer relatively glabrous skin sources, the donor sites of which can be easily hidden with clothes. One often overlooked split-thickness donor site is the scalp, taking extreme care to avoid taking the graft below the level of the hair follicle; this donor site heals quickly, painlessly, and with imperceptible scar consequences.

 

Sabiston :- The skin graft must be applied to a well-vascularized recipient wound bed. It will not adhere to exposed bone, cartilage, or tendon devoid of periosteum, perichondrium, or peritenon, respectively, or devoid of its vascularized perimembranous envelope.There are three steps in the “take” of a skin graft: imbibition, inosculation, and revascularization. Imbibition occurs up to 48 hours after graft placement and involves the free absorption of nutrients into the graft. Inosculation designates the time period when donor and recipient capillaries become aligned. There remains a debate as to whether new channels are formed or if preexisting channels reconnect. Finally, after about 5 days, revascularization occurs, and the graft demonstrates both arterial inflow and venous outflow.

Time period and Graft take not well explained in bailey .

Sabiston:- By examining the skin graft before the fourth postoperative day, a hematoma or seroma can be evacuated, and the mechanical obstruction to revascularization of the graft is thus removed. Some surgeons make stab incisions in the graft preemptively to create small outlets for fluid to drain from beneath the graft, a technique know as pie crusting. Others might use a mesh expander device, which creates a chain-link fence pattern in the graft. Although these methods may provide egress portals for serous fluid or blood, an unsightly meshed pattern results, making this technique unsuitable for aesthetic reconstruction.

Because split-thickness donor sites can be reharvested after re-epithelialization, this method of wound closure is the workhorse for burn injuries

Split grafts may be meshed to expand the surface area that can be covered. This technique is particularly useful when a large area must be resurfaced, as in major burns. Meshed grafts usually also have enhanced reliability of engraftment, because the fenestrations allow for egress of wound fluid and excellent contour matching of the wound bed by the graft. The fenestrations in meshed grafts re-epithelialize by secondary intention from the surrounding graft skin. The major drawbacks of meshed grafts are poor cosmetic appearance and high secondary contraction. Meshing ratios used usually range from 1:1.5 to 1:6, with higher ratios associated with magnified drawbacks.

Technical aspects
Graft take is only possible at well-vascularised recipient sites. Grafts will not take on bare bone, bare tendon or cartilage, but can survive on periosteum, paratenon and perichondrium. The graft must remain adherent to the bed until it revascularises; shearing forces must be eliminated. Meti­culous care with suturing and dressings is essential. Where grafts are applied over mobile areas appropriate splintage must be used. Limbs that have been grafted should be elevated to reduce venous pressure during the process of revascularisation. Haemostasis at the recipient site must be good to prevent bleeding beneath the graft resulting in its elevation by clot and failure of take. Skin grafts can be stored in a refrigerator at 40C for 2 weeks for delayed application. Grafts take well on granulation tissue, but excessive conta­mination with bacteria will prevent take. Streptococci at levels above 105 microorganisms per gram of tissue will result in graft loss. Preparation of the bed with dressings may help; it may be necessary to excise the granulation tissue.

FLAPS

Skin flap is used in all except – (AIIMS 89)
a) Bone b) Tendon
c) Burn wound d) Cartilage

The subdermal plexus forms the vascular basis for –
a)Randomised flaps (JIPMER 2002)
b)Axial flaps
c)Mucocutaneous flaps
d)Vasciocutaneous flaps

full thickness loss of middle one third of the upper lip is best reconstruted by – (AIIMS 84)
a) Naso labial flap b) Cheek flap
c) Abbey flap d) Estlander’s flap

In the reconstruction following excision of previously irradiated cheek cancer, the flap will be – (AIIMS 85)
a)Local tongue
b)Cervical
c)Forehead
d)Pectoralis major myocutaneous

Reconstruction of the breast following total mastectomy for cancer is done ideally by using –
a)Distant tube pedicvle (AIIMS 84)
b)Opposite breast
c)Trapezius myocutaneous flap
d)Latissmus dorsi myocunaneous flap

Flap commonly used in breast reconstruction is -a) Serratus anterior b) TRAM (TN 03)
c) Flap from arm d) Delto pectoral flap

Best flap for eosphagus repair – (CMC Vellore)
a) Colon b) Stomach
c) Jejunum d) Latismus dorsi

imageimage imageimage

                                                                                                                                                                                                                                                                                               Vascular patterns of random pattern (A) and axial pattern (B) skin flaps    Graphic representation of the bilobed flap commonly used for nasal reconstruction. P, primary flap; S, secondary flap

A flap is defined as a partially or completely isolated segment of tissue perfused with its own blood supply. Flaps are the reconstructive option of choice when a padded and durable cover is needed to reconstruct an integumentary defect over vital structures, tissues devoid of perivascular membrane, or implants. Flaps vary greatly in terms of complexity from simple skin flaps with a random blood supply to microvascular free flaps containing composite tissue. Numerous schemes exist to classify flaps. Flaps may be classified based on the type of tissue contained in the flap: fasciocutaneous, musculocutaneous, or osteocutaneous flaps. Flaps are also described based on their design and method of transfer: advancement, rotation, transposition, interpolation, or pedicled flaps. Flaps may be further defined by the source of their blood supply: random, axial, or free. Random flaps rely on the low perfusion pressures found in the subdermal plexus to sustain the flap and not a named blood vessel. Nevertheless, random flaps are used widely in reconstruction of cutaneous defects, including those resulting from Mohs excision of cutaneous malignancies. These local flaps recruit adjacent tissue based on geometric design patterns.

Advancement and rotation flaps represent commonly used random-pattern skin flaps. The Z-plasty, bilobed flap, rhomboid, and V-Y (or Y-V) advancement flaps are commonly used random flaps. Z-plasty involves transposing two adjacent triangular flaps to redirect and lengthen an existing scar (the central limb).The angles of the Z-plasty can be increased to provide greater length. Typically a 60-degree angle is used that lengthens the central limb by 75%.The bilobed flap is commonly used for nasal reconstruction; here, a larger primary and smaller secondary flap are transposed into adjacent defects borrowing the loose adjacent tissue to close the defect . The rhomboid flap described by Limberg uses a 60- and 120-degree parallelogram to transpose tissue into a diamond-shaped defect. It is an extremely versatile flap option and the workhorse for most plastic surgeons. Finally, the V-Y (or Y-V) advancement flaps are commonly used to lengthen scars around the nose and mouth. A backcut at the base of a flap may decrease tension at a flap’s tip, creating a greater arc of rotation; overzealous back cut or tension at flap inset can each cause ischemia to the flap and threaten its survival.

An axial flap is based on a named blood vessel and can provide a reproducible and stable skin or skin-muscle (myocutaneous) flap. Flaps can also be raised with the underlying fascia (fasciocutaneous), which recruits the fascial blood supply, thereby increasing the predictable vascularity to the flap. Because of its reliable blood supply, the axial flap can be used to provide much needed length and bulk, which the random flap cannot. An axial flap that remains attached to its proximal blood supply and is transposed to a defect is known as a pedicled flap. Alternately, the vascular pedicle can be completely transected and the paddle of tissue transferred and reanastomosed to recipient vessels in a remote location. This technique requires the use of an operating microscope and is known as microsurgery

Keratoacanthoma is- (AIIMS 85)
a)A type of basal cell carcinoma
b)Infected sebaceous cyst
c)Self healing nodular lesion with central ulceration
d)Pre-malignant disease

True about keratoacanthoma – (PGI 2000)
a)Benign tumor
b)Malignant skin tumor like squamous cell carcinoma
c)Treatment same as for squamous cell carcinoma
d)Easy to differentiate from squamous cell Ca. histologically
e)Treatment is masterly inactivity (
Watchful Waiting:-A hands-off management philosophy in which certain conditions are closely monitored, but treatment withheld until symptoms either appear or some measurable parameter changes. Active management is begun once the patients become symptomatic)

Keratoacanthoma
Keratoacanthoma (molluscum sebaceum) arises as a rapid proliferation of squamous epidermal cells. The nodule grows rapidly for 6—8 weeks at which time it usually begins to resolve spontaneously. Keratoacanthoma must be distinguished from SCC. Usually rapid evolution to relatively large size, irregular crater shape and keratotic plug, and the undamaged surrounding skin make a distinction possible. Spontaneous healing further confirms the diagnosis. Histologically, it is difficult to differentiate between a keratoacanthoma and SCC. There is also a possibility of a highly anaplastic SCC behaving like a keratoacanthoma. Excision biopsy is mandatory if the diagnosis is in doubt as curetted specimens yield poor sections.

Which of the following is a regressing
tumour- (AI 91)
a) Portwine stain b) Strawberry angioma
c) Venous angioma d) Plexiform angioma

Spontaneous regression is seen in all except –
a)Salmon patch (Al 93)
b)Small Cavernous hemangioma
c)Portwine stain
d)Strawberry angioma

All are features of pesudopancreatic cyst, except
a)Follows acute pancreatitis (AI 97)
b)Lined by false epithelium
c)May regress spontaneously
d)Treatment of choice is percutaneous aspiration

Least likely to regress spontaneously is(AIIMS 96)
a) Osteosarcoma b) Retinoblasoma
c) Choriocarcinoma d) Malignant melanoma

Spontaneous Regresssion is seen in all except –
a) Retinoblasoma b) Malignant melanoma (AI 98)
c) Osteosarcoma d) Choriocarcinoma

Cystic hygroma – (SCTIMS 98)
a)Should be left alone
b)Excision of cyst at an early age
c)Spontaneous regression
d)Manifests in 2nd – 3rd decade

[Ref Bailey & Love 240/e p. 771 & 23"/e p. 701] Spontaneous regression may occur in cystic hygroma

Spontaneous regression of malignant tumour is seen in – (JIPMER 80, AIIMS 81)
a) Burkits lymphoma
b) Neuroblasoma
c) Wilm’s tumour d) Renal cell carcinoma

Salmon patch usually disappears by age- (PGI 80, 81, a) One mouth b) One year UPSC 89)
c) Puberty d) None of the above

Regarding hemangiomas following are true –
a)Salmon patch disappears after the age of one
b)Port wine stain present throughout life
c)Salmon patch-on forehead midline and over occiput
d)all are correct

Eleven month old child presents with erythematous lesion with central clearing which has been decreasing in size – (Al 97)
a)Strawberry angioma
b)Nevus
c)Portwine stain
d)Cavernous haemangioma

The best cosmetic results for large capillary (port wine) hemangiomas are achieved by – (UPSC 05)
a)Excision and split-thickness skin
b)Laser ablation
c)Cryosurgery
d)Tattooing

True about Hemangioma of head & neck -(PGI 01)
a) Are very common b) Sturge Weber synd
c) High output failure
d) Thrombocytopenia

Hemangioma of the rectum – (PGI June 07)
a)Common tumour
b)Fatal haemorrhage seen
c)Ulcerative colitis like symptoms seen

True about lymphangioma – (PGI 03)
a)It is a malignant tumour
b)It is a congenital sequestration of lymphatic
c)Cystic hygroma is a lymphangioma

d)Laser excision is done
e)Sclerotherapy is commonly done’

Which is the commonest incidentaloma detected in the liver – (Karn. 94)
a)Focal nodular hyperplasia
b)Haemangioma
c)Hepatocellular adenoma
d)Hydatid cyst

"Crumbled egg appearance" in liver seen in –
a) Hepatic adenoma (UP 07)
b) Chronic amoebic liver abscess
c)Hydatid liver disease
d)Haemangioma

Earliest tumour to appear after bith is-(JIPMER 87)
a) Sternomastoid tumour
b) Cystic hygroma
c) Branchial cyst d) Lymphoma

Ans. is ‘b’ i.e., Cystic hygroma [Ref Bailey & Love 24th/e p. 771 & 23’/e p. 700] 50% to 65% of Cystic hygroma prasent of birth

Cystic compressible, translucent swelling in the posterior triangle of neck- (Al 89) a) Cystic hygroma
c) Thyroglossal cyst
b) Branchial cyst
d) Dermoid cyst

Treatment of cystic hygroma is – (JIPMER 88)
a)Surgical excision
b)Injection of sclerosants
c)Irradiation
d)Masterly inactivity

The brilliantly transilluminant tumour in the neck may be- (AI 91)
a) Branchial cyst b) Thyroglossal cyst
c) Sternomastoid tumour d) Cystic hygroma

All are true about cystic hygroma except –
a)Pulsatile (AMU 95)
b)May cause respiratory obstruction
c)Common in neck
d)Present at birth

All are true about cystic hygroma except -(PG1 99)
a)Aspiration is diagnostic
b)50% present at birth
c)Presents as posterior cervical swelling
d)Sequstration of lymphatic tissue

True about cystic hygroma – (PGI 2000)
a)Congenital sequestration of lymphatics
b)Resolves spontaneouly by 5 year of age
c)Common in upper 1/3rd of lateral neck
d)Surgery is the treatment of choice

Calcifying epithelioma is seen in – (JIPMER 95)
a) Dermato fibroma b) Adenoma sebaceum
c) Pyogenic granuloma d) Nevo cellular nevus

none?

Margins of squamous cells carcinoma is -(JIPMER a) Inverted b) Everted 81,Delhi 86)
c) Rolled d) Undermined

Calcifying epithelioma is also known as —
a)Pilomatrixoma (AIMS 86)
b)Myoblastoma
c)Calcinosis cutis
d)Dermatofibroma lenticulare

VASCULAR MALFORMATION.

Vascular malformations are developmental errors in blood vessel formation. Malformations do not regress and slowly enlarge. They should be named after the predominant blood vessel forming the lesion .Table helps differentiate vascular malformations from true hemangiomas.


Vascular Malformations
TYPE EXAMPLES
Capillary Port-wine stain
Venous Venous malformation
  Angiokeratoma circumscriptum (hyperkeratotic venule)
  Cutis marmorata telangiectasia congenital (congenital phlebectasia)
Arterial Arteriovenous malformation
Lymphatic Small vessel lymphatic malformation (lymphangioma circumscriptum)
Large vessel lymphatic malformation (cystic hygroma)
 

Major Differences Between Hemangiomas and Vascular Malformations
HEMANGIOMAS VASCULAR MALFORMATIONS (CAPILLARY, VENOUS, LYMPHATIC, ARTERIAL, AND ARTERIOVENOUS, PURE OR COMPLEX-COMBINED)
Clinical Variably visible at birth Usually visible at birth (AVMs may be quiescent)
  Subsequent rapid growth Growth proportionate to the skin’s growth (or slow progression); present lifelong
  Slow, spontaneous involution  
Sex ratio F: M 3 : 1 to 5 : 1 and 7 : 1 in severe cases 1 : 1
Pathology Proliferating stage: hyperplasia of endothelial cells and SMC-actin+ cells Flat endothelium
  Multilaminated basement membrane Thin basement membrane
  Higher mast cell content in involution Often irregularly attenuated walls (VM, LM)
Radiology Fast-flow lesion on Doppler sonography Slow flow (CM, LM, VM) or fast flow (AVM) on Doppler ultrasonography
  Tumoral mass with flow voids on MRI MRI: Hypersignal on T2 when slow flow (LM, VM); flow voids on T1 and T2 when fast flow (AVM)
  Lobular tumor on arteriogram Arteriography of AVM demonstrates AV shunting
Bone changes Rarely mass effect with distortion but no invasion Slow-flow VM: distortion of bones, thinning, underdevelopment
    Slow-flow CM: hypertrophy
    Slow-flow LM: distortion, hypertrophy, and invasion of bones
    High-flow AVM: destruction, rarely extensive lytic lesions
    Combined malformations (e.g., slow-flow [CVLM, Klippel-Trenaunay syndrome] or fast-flow [CAVM, Parkes-Weber syndrome]): overgrowth of limb bones, gigantism
   
Immunohistochemistry on tissue samples Proliferating hemangioma: high expression of PCNA, type IV collagenase, VEGF, urokinase, and bFGF Lack expression of PCNA, type IV collagenase, urokinase, VEGF, and bFGF
One familial (rare) form of VM linked to a mutated gene on 9p (VMCM1)
Involuting hemangioma: high TIMP-1, high bFGF  
Hematology No coagulopathy (Kasabach-Merritt syndrome is a complication of other vascular tumors of infancy, e.g., Kaposiform hemangioendothelioma and tufted angioma, with a LM component) Slow-flow VM or LM or LVM may have an associated LIC with risk of bleeding (DIC)
From Eichenfield LF, Frieden IJ, Esterly NB: Textbook of Neonatal Dermatology. Philadelphia, WB Saunders, 2001, p 337.

AVM, Arteriovenous malformation; bFGF, basic fibroblast growth factor; CAVM, capillary arteriovenous malformation; CLVM, capillary lymphatic venous malformation; CM, capillary malformation/port-wine stain; DIC, disseminated intravascular coagulation; LIC, local-ized intravascular coagulopathy; LM, lymphatic malformation; MRI, magnetic resonance imaging; PCNA, proliferating cell nuclear antigen; SMC, smooth muscle cell; TIMP, tissue inhibitor of metalloproteinase; VEGF, vascular endothelial growth factor; VM, venous malformation

CAPILLARY MALFORMATION (PORT-WINE STAIN/CAPILLARY NEVUS

Port-wine stains are present at birth. These vascular malformations consist of mature dilated dermal capillaries. The lesions are macular, sharply circumscribed, pink to purple, and tremendously varied in size .The head and neck region is the most common site of predilection; most lesions are unilateral. The mucous membranes can be involved. As a child matures into adulthood, the port-wine stain may become darker in color and pebbly in consistency; it may occasionally develop elevated areas that bleed spontaneously.

True port-wine stains should be distinguished from the most common vascular malformation, the salmon patch of neonates, which, in contrast, is a relatively transient lesion .When a port-wine stain is localized to the trigeminal area of the face, specifically around the eyelids, the diagnosis of Sturge-Weber syndrome (glaucoma, leptomeningeal venous angioma, seizures, hemiparesis contralateral to the facial lesion, intracranial calcification) must be considered .Early screening for glaucoma is important to prevent additional damage to the eye. Port-wine stains also occur as a component of Klippel-Trenaunay syndrome and with moderate frequency in other syndromes, including the Cobb (spinal arteriovenous malformation, port-wine stain), Proteus, Beckwith-Wiedemann, and Bonnet-Dechaume-Blanc syndromes. In the absence of associated anomalies, morbidity from these lesions may include a poor self-image, hypertrophy of underlying structures, and traumatic bleeding.

The most effective treatment for port-wine stains is the pulsed dye laser (PDL). This therapy is targeted to hemoglobin within the lesion and avoids thermal injury to the surrounding normal tissue. After such treatment, the texture and pigmentation of the skin are generally normal without scarring. Therapy can begin in infancy when the surface area of involvement is smaller; there may be advantages to treating within the 1st year of life. Masking cosmetics may also be used.

SALMON PATCH (NEVUS SIMPLEX:- Salmon patches are small, pale pink, ill-defined, vascular macules that occur most commonly on the glabella, eyelids, upper lip, and nuchal area of 30–40% of normal newborn infants. These lesions, which represent localized vascular ectasia, persist for several months and may become more visible during crying or changes in environmental temperature. Most lesions on the face eventually fade and disappear completely, although lesions occupying the entire central forehead often do not. Those on the posterior neck and occipital areas usually persist. The facial lesions should not be confused with a port-wine stain, which is a permanent lesion. The salmon patch is usually symmetric, with lesions on both eyelids or on both sides of midline. Port-wine stains are often larger and unilateral, and they usually end along the midline

Boil can occur at all sites except – (TN 95)
a) Pinna b) Skin
c) Scalp d) Palm

Excision of the hyoid bone is done in – (PGI 88)
a) Branchial cyst b) Branchial fistula
c) Thyroglossal cyst d) Sublingual dermoids

Cystic Hygroma

Nelson:- Lymphangioma (cystic hygroma) is a mass of dilated lymphatics. Some of these lesions also have a hemangiomatous component .Surgical treatment is complicated by a high incidence of recurrence. Intralesional sclerosing with OK-432, a streptococcal derivative, has been used successfully in selected patients. Macrocystic lesions appear to respond better than microcystic lymphangiomas to sclerotherapy. Lymphatic dysplasia may cause multisystem problems. These include lymphedema, chylous ascites, chylothorax, and lymphangiomas of the bone, lung, or other sites.

Bailey:- Cystic hygroma:-Cystic hygroma is an abnormal lymph-filled, often multilocular, space which usually presents in childhood as a soft, brilliantly transluminable swelling in the base of the neck. It is also found in the head and inguinal regions as they develop from primitive lymph cisterns. It behaves like a benign tumour and grows gradually in size, leading to cosmetic problems and compression of surrounding structures. Recurrence is common after simple aspiration and injection of sclerosant. Excision is technically challenging due to the large number of vital structures in the vicinity.

Sabiston:-A cystic hygroma is a lymphatic malformation that occurs as a result of a maldeveloped localized lymphatic network, which fails to connect or drain into the venous system. Most (75%) involve the lymphatic jugular sacs and present in the posterior neck region .Another 20% occur in the axilla, and the remainder are found throughout the body, including the retroperitoneum, mediastinum, pelvis, and inguinal area. Roughly 50% to 65% of hygromas present at birth, and most become apparent by the second year of life.

Because hygromas are multiloculated cystic spaces lined by endothelial cells, they usually present as soft, cystic masses that distort the surrounding anatomy. The indications for therapy are obviously cosmetic. In addition, the hygroma may expand to compress the airway, resulting in acute airway obstruction. Prenatal recognition of a large cystic mass of the neck is associated with significant risk to the airway, greater association with chromosomal abnormalities, and higher mortality rates. Improved fetal imaging modalities may allow for intervention at the time of delivery based on principles of pharmacologic maintenance of placental circulation until endotracheal intubation is achieved. This technique is referred to as the ex utero intrapartum therapy (EXIT) procedure.and is discussed later in this chapter. In addition to accumulating lymph fluid, hygromas are prone to infection and hemorrhage within the mass. Thus, rapid changes in the size of the hygroma may necessitate more urgent intervention.

Complete surgical excision is the preferred treatment; however, this may be impossible because of the hygroma infiltrating within and around important neurovascular structures. Careful preoperative magnetic resonance imaging (MRI) to define the extent of the hygroma is crucial. Operations are routinely performed with the aid of loupe magnification and a nerve stimulator. Because hygromas are not neoplastic tumors, radical resection with removal of major blood vessels and nerves is not indicated. Postoperative morbidity includes recurrence, lymphatic leak, infection, and neurovascular injury.

Injection of sclerosing agents such as bleomycin or the derivative of Streptococcus pyogenes OK-432 have also been reported to be effective in the management of cystic hygromas. Intracystic injection of sclerosants appears to be most effective for macrocystic hygromas, as opposed to the microcystic variety.

Ex Utero Intrapartum Therapy Procedure  (Schwartz)

The ex utero intrapartum therapy (EXIT) procedure is used in circumstances in which airway obstruction is predicted at the time of delivery due to the presence of a large neck mass, such as a cystic hygroma or teratoma .or to congenital tracheal stenosis. The success of the procedure depends on the maintenance of uteroplacental perfusion for a sufficient duration to secure the airway. To achieve this, deep uterine relaxation is obtained during a cesarian section under general anesthesia. Uterine perfusion with warmed saline also promotes relaxation and blood flow to the placenta. On average, between 20 and 30 minutes of placental perfusion can be achieved. The fetal airway is secured either by placement of an orotracheal tube or performance of a tracheostomy. Once the airway is secured, the cord is cut, and a definitive procedure may be performed to relieve the obstruction in the postnatal period. In general, infants with cystic neck masses such as lymphangiomas have a more favorable response to an EXIT procedure than infants with solid tumors such as teratomas; this is particularly true for premature infants

Marjolin ulcer – (PGI June 07)
a)Ca in marjolin’s is squamous cell ca
b)Chronic venous insufficiency
c)Basal cell carcinoma
d)arise from base of the ulcer

Wounds that are chronically inflamed and do not proceed to closure are susceptible to the development of squamous cell carcinoma .Originally reported in chronic burn scars by Marjolin,other conditions have also been associated with this problem, including osteomyelitis, pressure sores, venous stasis ulcers, and hidradenitis. The wound appears irregular, raised above the surface, and has a white, pearly discoloration. The premalignant state is pseudoepitheliomatous hyperplasia. If this report is obtained on a biopsy specimen, the biopsy is repeated because squamous cell carcinoma may be present in other areas.

True about Marjolins ulcer – (PGI 03)
a)Develops in long standing scar
b)Sq cell Ca develops
c)Slow growing lesion
d)Also know as Baghdad sore
e)Common in Black races

True about marjolins ulcer is – (PGI 97)
a) Ulcer over scar b) Rapid growth
c) Rodent ulcer d) Painful

Chronically lymphoedematous limb is predisposed to all of the following except – (Al 04)
a)Thickening of the skin
b)Recurrent soft tissue infections
c)Marjolin’s ulcer
d)Sarcoma

Chronic lymphedema predisposes to all except – (PGI 89)
a) Lymphangiosarcoma b) Marjolins ulcer
c) Recurrent infections d) Thickening of skin

Not a premalignant ulcer – (Kerala 94)
a)Bazin’s ulcer
b)Pagets disease of nipple
c)Marjolins ulcer
d)Lupur vulgaris

Commonest cancer in burn scar is – (PGI 97)
a) Sq. cell Ca b) Fibrosarcoma
c) Adenoa Ca d) Adeno-squamous Ca

Oriental sore (syn. Delhi boil, Baghdad sore, etc.):-This disease is due to infection by a protozoal parasite, Leishmania tro pica, and is a common condition in Eastern countries which is occasionally imported to Western zones.

Malignancies of Skin

Margins of squamous cells carcinoma is -(JIPMER a) Inverted b) Everted 81,Delhi 86)
c) Rolled d) Undermined

In pigmented basal cell carcinoma, treatment of choice is – (PGI 98)
a) Chemotherapy b) Radiotherapy
c) Cryosurgery d) Excision

Diagnostic procedure for basal cell Ca – (PGI 98)
a) Wedge biopsy b) Shave
c) Incisional biopsy d) Punch bio

Moh’s Micrographic excision for basal cell carcinoma is used for all of the following except –
a)Recurrent Tumour (Karnataka 06)
b)Tumor less than 2 cm in diameter
c)Tumors with aggressive histology
d)Tumors with perineural invasion

Basal cell carcinoma spread by – (MAHE 07)
a) Lymphatics b) Haematogenous
c) Direct spread d) None of the above

The commonest clinical pattern of basal cell carcinoma is – (Corned 08)
a) Nodular b) Morpheaform
c) Superficial d) Keratotic

A 48-year-old sports photographer has noticed a small nodule over the upper lip from four months. The nodule is pearly white with central necrosis, telangiectasia. The most likely diagnosis would be –
a)Basal cell carcinoma (AIIMS 06)—Telangiectasia uncommon in SCC
b)Squamous cell carcinoma
c)Atypical melanoma
d)Kaposis sarcoma

Match list I with list II and select the correct answer using the code given below the lists – (UPSC 07)
List I List II
(Carcinoma) (Characteristic)
A.Seminoma testis 1. Hormone dependent
B.Carcinoma prostate 2. Does not spread by
C.Basal cell carcinoma lymphatics
D.Malignant melanoma 3. Prognosis depends on thickness
4. Highly radiosensitive
Code :
a)
A B C D
4 1 2 3
b)A B C D
4 2 1 3
c)A B C D
3 1 2 4
d)A B C D
3 2 1 4

Ans. is ‘a’ i.e., Basal cell carcinoma [Ref: Sabiston 17"/e p. 796; Harrison 166/e p. 497;
S.Das text book of Surgery Pile 101-103]

 

Basal Cell Carcinoma BCC is a malignancy arising from epidermal basal cells. The least invasive of BCC subtypes, superficial BCC, classically consists of truncal erythematous, scaling plaques that slowly enlarge. This BCC subtype may be confused with benign inflammatory dermatoses, especially nummular eczema and psoriasis. BCC can also present as a small, slow-growing pearly nodule, often with small telangiectatic vessels on its surface (nodular BCC). The occasional presence of melanin in this variant of nodular BCC (pigmented BCC) may lead to confusion clinically with melanoma. Morpheaform (fibrosing) BCC and micronodular BCC, the most invasive subtypes, manifest as solitary, flat or slightly depressed, indurated, whitish or yellowish plaques. Borders are typically indistinct, a feature associated with a greater potential for extensive subclinical spread.

Rx:- The most frequently employed treatment modalities for BCC include electrodesiccation and curettage (ED&C), excision, cryosurgery, radiation therapy, laser therapy, Mohs micrographic surgery (MMS), topical 5-fluorouracil, and topical immunomodulators. The mode of therapy chosen depends on tumor characteristics, patient age, medical status, preferences of the patient, and other factors. ED&C remains the method most commonly employed by dermatologists. This method is selected for low-risk tumors (e.g., a small primary tumor of a less aggressive subtype in a favorable location). Excision, which offers the advantage of histologic control, is usually selected for more aggressive tumors or those in high-risk locations or, in many instances, for aesthetic reasons. Cryosurgery employing liquid nitrogen may be used for certain low-risk tumors but requires specialized equipment (cryoprobes) to be effective for advanced neoplasms. Radiation therapy, while not used as often, offers an excellent chance for cure in many cases of BCC. It is useful in patients not considered surgical candidates and as a surgical adjunct in high-risk tumors. Younger patients may not be good candidates for radiation therapy because of the risks of long-term carcinogenesis and radioderma

Squamous Cell Carcinoma Primary cutaneous SCC is a malignant neoplasm of keratinizing epidermal cells. SCC can grow rapidly and metastasize. The clinical features of SCC vary widely. Commonly, SCC appears as an ulcerated erythematous nodule or superficial erosion on the skin or lower lip, but it may present as a verrucous papule or plaque. Overlying telangiectasias are uncommon. The margins of this tumor may be ill-defined, and fixation to underlying structures may occur. Cutaneous SCC may develop anywhere on the body but usually arises on sun-damaged skin. A related neoplasm, keratoacanthoma, typically appears as a dome-shaped papule with a central keratotic cra-ter, expands rapidly, and commonly regresses without therapy. This lesion can be difficult to differentiate from SCC. Actinic keratoses and cheilitis, both premalignant forms of SCC, present as hyperkeratotic papules on sun-exposed areas. The potential for malignant degeneration in untreated lesions ranges from 0.25 to 20%. Bowen’s disease, an in situ form of SCC, presents as a scaling, erythematous plaque. Treatment of premalignant and in situ lesions reduces the subsequent risk of invasive disease.

Rx:- SQUAMOUS CELL CARCINOMA The therapy of cutaneous SCC should be based on an analysis of risk factors influencing the biologic behavior of the tumor. These include the size, location, and degree of histologic differentiation of the tumor as well as the age and physical condition of the patient. Surgical excision, MMS, and radiation therapy are standard methods of treatment. Cryosurgery and ED&C have been used successfully for premalignant lesions and small primary tumors. Metastases are treated with lymph node dissection, irradiation, or both. 13-cis-retinoic acid (1 mg orally every day) plus INF-α (3 million units subcutaneously or intramuscularly every day) may produce a partial response in most patients. Systemic chemotherapy combinations that include cisplatin may also be palliative in some patients.

 

image

This basal cell
carcinoma shows central ulceration and a pearly, rolled, telangiectatic
tumor border.

image

Squamous cell carcinoma is seen here as a hyperkeratotic crusted
and somewhat eroded plaque on the lower lip
. Sun-exposed skin such
as the head, neck, hands, and arms are other typical sites of involvement.

image

Keratoacanthoma
is a low-grade squamous cell carcinoma that presents as
an exophytic nodule with central keratinous debris

Keratoacanthoma
Keratoacanthoma (molluscum sebaceum) arises as a rapid proliferation of squamous epidermal cells. The nodule grows rapidly for 6—8 weeks at which time it usually begins to resolve spontaneously. Keratoacanthoma must be distinguished from SCC. Usually rapid evolution to relatively large size, irregular crater shape and keratotic plug, and the undamaged surrounding skin make a distinction possible. Spontaneous healing further confirms the diagnosis. Histologically, it is difficult to differentiate between a keratoacanthoma and SCC. There is also a possibility of a highly anaplastic SCC behaving like a keratoacanthoma. Excision biopsy is mandatory if the diagnosis is in doubt as curetted specimens yield poor sections.

image

Malignant pustule occurs in – (PGI 88) a) Melanoma b) Gas gangrene ) Ovarian tumour d) Anthrax

All are true statement about malignant melanoma except- (A197)
a)Clark’s classification used for prognosis
b)Women have better prognosis
c)Acral lentigenous have better prognosis
d)Limb perfusion is used for local treatment

Prognosis of malignant melanoma depends on – (JIPMER 98)
a) Grade of tumor b) Spread of tumor
c) Depth of invasion d) Metastasis

Worst prognosis in Melanoma is seen in the subtype-
a)Superficial spreading (Kerala 2001)
b)Nodular Melanoma
c)Lentigo Maligna Melanoma
d)Amelanotic Melanoma

Least malignant melanoma is- (Kerala 2001)
a) Lentigo maligna b) Superifcial spreading
c) Nodular d) Amelanotic

Prognosis of melanoma depends on – (PGI 98)
a
)Stage
b)Depth of melanoma on biopsy

c)Duration of growth
d)Site

Which one of the following is not included in the treatment of malignant melanoma – (UPSC 05)
a) Radiation b) Surgical excision
c) Chemotherapy d) Immunotherapy

In the Clatke’s level of tumor invasion for malignant melanoma level 3 refers to – (COMED 06)
a)All tumar cells above basement membrane
b)Invasion into reticular dermis
c)Invasion into loose connective tissue of papillary dermis
d)Tumor cells at junction of papillary and reticular dermis

True about melanoma of the anal canal is -(PGI 99)
a)Present usually as anal bleeding
b)AP resection gives better result than local excision
c)Local recurrence at the same site after resection
d)Radiosensitive

Most common site of Ientigo maligna melanoma is –a) Face b) Legs (PGI 01)
c) Trunks d) Soles

Most common origin of melanoma is from –
a)Junctional melanocytes (AMU 01)
b)Epidermal cells
c)Basal cells
d)Follicular cells

Melanomas originate from neural crest-derived melanocytes; pigment
cells present normally in the epidermis and sometimes in the dermis.

The back is the
most common site for melanoma in men. In women, the back and the
lower leg (from knee to ankle) are common sites.

The most important prognostic factor is the stage at the time of presentation. Fortunately, most melanomas are diagnosed in clinical stages I and II. The revised American Joint Committee on Cancer (AJCC) staging system for melanoma is based on microscopic primary tumor depth (Breslow’s thickness), presence of ulceration, evidence of nodal involvement, and presence of metastatic disease to internal sites

An alternative prognostic scheme for clinical stages I and II melanoma, proposed by Clark, is based on the anatomic level of invasion in the skin. Level I is intraepidermal (in situ); level II penetrates the papillary dermis; level III spans the papillary dermis; level IV penetrates the reticular dermis; and level V penetrates into the subcutaneous fat. The 5-year survival for these stages averages 100, 95, 82, 71, and 49%, respectively.

Any pigmented cutaneous lesion that has changed in size or shape or has other features suggestive of malignant melanoma is a candidate for biopsy. The recommended technique is an excisional biopsy, as that facilitates pathologic assessment of the lesion, permits accurate measurement of thickness if the lesion is melanoma, and constitutes treatment if the lesion is benign. For large lesions or lesions on anatomic sites where excisional biopsy may not be feasible (such as the face, hands, or feet), an incisional biopsy through the most nodular or darkest area of the lesion is acceptable; this should include the vertical growth phase of the primary tumor, if present. Incisional biopsy does not appear to facilitate the spread of melanoma.

The following margins can be recommended for primary melanoma: in situ: 0.5 cm; invasive up to 1 mm thick: 1.0 cm; >1 mm: 2.0 cm. For lesions on the face, hands, and feet, strict adherence to these margins must give way to individual considerations about the constraints of surgery and minimization of morbidity. In all instances, however, inclusion of subcutaneous fat in the surgical specimen facilitates adequate thickness measurement and assessment of surgical margins by the pathologist.

Patients who have advanced regional disease limited to a limb may benefit from hyperthermic limb perfusion with melphalan. High complete response rates have been reported, and responses are associated with significant palliation of symptoms

wedge biopsy:- An excisional biopsy in which a lesion identified at the time of a surgical procedure is removed, with a wedge of normal surrounding tissue

Trophic ulcers are caused by – (PGI 02)
a) Leprosy b) Buerger’s disease
c) Syringomyelia d) DVT
e) Varicose veins

Trophic ulcers [trophe (Greek) = nutrition] are due to an impairment of the nutrition of the tissues, which depends upon an adequate blood supply and a properly functioning nerve supply. Ischaemia and anaesthesia therefore will cause these ulcers. Thus, in the arm, chronic vasospasm and syringomyelia will cause ulceration of the tips of the fingers (respectively painful and painless). In the leg, painful ischaemic ulcers occur around the ankle or on the dorsum of the foot. Neuropathic ulcers due to anaesthesia (diabetic neuritis, spina bifida, tabes dorsalis, leprosy or a peripheral nerve injury) are often called perforating ulcers .Starting in a corn or bunion, they penetrate the foot, and the suppuration may involve the bones and joints and spread along fascial planes upwards, even involving the calf.

Nonspecific ulcers are due to infection of wounds, or physical or chemical agents. Local irritation, as in the case of a dental ulcer, or interference with the circulation, e.g. varicose veins, are predisposing causes.

A healing, nonspecific ulcer has a shelving edge. It is pearly, rolled or rampant if a rodent ulcer, and raised and everted if an epithelioma, under­mined and often bluish if tuberculous, vertically punched out if syphilitic.

Treatment for pyoderma gangrenosum is –
a)Steroids (Jharkand 03)
b)I.V. antibiotics
c)Surgery + antibiotics
d)Surgery alone

Which of the following materials for implants will
evoke least inflammatory tissue response –
a)Polypropylene (SGPGI 04)
b)Bovine collagen
c)Polygiactin
d)Cotton

Chronic Burrowing ulcer is caused by – (.AI07)
a)Microaerophilic streptococci
b)Peptostreptococcus
c)Streptococcus viridans
d)Streptococcus pyogenes

Schwartz:- Pyoderma gangrenosum is a relatively uncommon destructive cutaneous lesion. Clinically, a rapidly enlarging, necrotic lesion with undermined border and surrounding erythema characterize this disease. Linked to underlying systemic disease in 50% of cases, these lesions are commonly associated with inflammatory bowel disease, rheumatoid arthritis, hematologic malignancy, and monoclonal immunoglobulin A gammapathy.Recognition of the underlying disease is of paramount importance. Management of pyoderma gangrenosum ulcerations without correction of underlying systemic disorders is fraught with complication. A majority of patients receive systemic steroids or cyclosporine.Although medical management alone may slowly result in wound healing, many physicians advocate chemotherapy with aggressive wound care and skin graft coverage.

Sabiston:- Extraintestinal manifestations of ulcerative colitis include arthritis, ankylosing spondylitis, erythema nodosum, pyoderma gangrenosum, and primary sclerosing cholangitis. Arthritis, particularly of the knees, ankles, hips, and shoulders, occurs in about 20% of patients, typically in association with increased activity of the intestinal disease. Ankylosing spondylitis occurs in 3% to 5% of patients and is most prevalent in patients who are HLA-B27 positive or have a family history of ankylosing spondylitis. Erythema nodosum arises in 10% to 15% of patients with ulcerative colitis and often occurs in conjunction with peripheral arthropathy. Pyoderma gangrenosum typically presents on the pretibial region as an erythematous plaque that progresses into an ulcerated, painful wound. Most patients who develop this condition have underlying active inflammatory bowel disease. Arthritis, ankylosing spondylitis, erythema nodosum, and pyoderma gangrenosum typically improve or completely resolve after colectomy.

Colectomy has no effect on the course of PSC.

According to Harrison:- Pyoderma gangrenosum (PG) is seen in 1–12% of UC patients and less commonly in Crohn’s colitis. Although it usually presents after the diagnosis of IBD, PG may occur years before the onset of bowel symptoms, run a course independent of the bowel disease, respond poorly to colectomy, and even develop years after proctocolectomy. It is usually associated with severe disease. Lesions are commonly found on the dorsal surface of the feet and legs but may occur on the arms, chest, stoma, and even the face. PG usually begins as a pustule and then spreads concentrically to rapidly undermine healthy skin. Lesions then ulcerate, with violaceous edges surrounded by a margin of erythema. Centrally, they contain necrotic tissue with blood and exudates. Lesions may be single or multiple and grow as large as 30 cm. They are sometimes very difficult to treat and often require intravenous antibiotics, intravenous glucocorticoids, dapsone, azathioprine, thalidomide, intravenous cyclosporine, or infliximab.

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Surgery MCQs

Posted by Dr KAMAL DEEP on May 23, 2011

KELOID AND HTSs

HTSs rise above the skin level but stay within the confines of the original wound and often regress over time. Keloids rise above the skin level as well, but extend beyond the border of the original wound and rarely regress spontaneously .Both HTSs and keloids occur after trauma to the skin, and may be tender, pruritic, and cause a burning sensation. Keloids are 15 times more common in darker-pigmented ethnicities, with individuals of African, Spanish, and Asian ethnicities being especially susceptible. Men and women are equally affected. Genetically, the predilection to keloid formation appears to be autosomal dominant, with incomplete penetration and variable expression

Keloids tend to occur 3 months to years after the initial insult, and even minor injuries can result in large lesions

HTSs usually develop within 4 weeks after trauma. The risk of HTSs increases if epithelialization takes longer than 21 days.

Keloids can result from surgery, burns, skin inflammation, acne, chickenpox, zoster, folliculitis, lacerations, abrasions, tattoos, vaccinations, injections, insect bites, ear piercing, or may arise spontaneously.even minor injuries can result in large lesions.Certain body sites have a higher incidence of keloid formation, including the skin of the earlobe as well as the deltoid, presternal, and upper back regions. They rarely occur on eyelids, genitalia, palms, soles, or across joints. Keloids rarely involute spontaneously, whereas surgical intervention can lead to recurrence, often with a worse result.Keloid scars tend to occur above the clavicles, on the trunk, on the upper extremities, and on the face

HTSs They usually occur across areas of tension and flexor surfaces, which tend to be at right angles to joints or skin creases.. A hypertrophic scar can occur anywhere on the body.

 

 

Opposite Views?

Sabiston :-Histologically, both HTSs and keloids demonstrate increased thickness of the epidermis with an absence of rete ridges. There is an abundance of collagen and glycoprotein deposition. Normal skin has distinct collagen bundles, mostly parallel to the epithelial surface, with random connections between bundles by fine fibrillar strands of collagen. In HTSs, the collagen bundles are flatter, more random, and the fibers are in a wavy pattern. In keloids, the collagen bundles are virtually nonexistent, and the fibers are connected haphazardly in loose sheets with a random orientation to the epithelium. The collagen fibers are larger and thicker and myofibroblasts are generally absent.

After secretion into the ECM, specific proteases cleave the propeptides of the procollagen molecules to form collagen monomers. These monomers assemble to form collagen fibrils in the ECM, driven by collagen’s tendency to self-assemble. Covalent cross-linking of the lysine residues provides tensile strength. The extent and type of cross-linking vary from tissue to tissue. In tissues such as tendons, where tensile strength is crucial, collagen cross-linking is extremely high. In mammalian skin, the fibrils are organized in a basket-weave pattern to resist multidirectional tensile stress. In tendons, on the other hand, fibrils are in parallel bundles aligned along the major axis of tension

Schwartz :-Keloids and hypertrophic scars have stretched collagen bundles aligned in the same plane as the epidermis, as opposed to normal scar tissue, where the collagen bundles are randomly arrayed and relaxed. In addition, keloid scars have thicker, more abundant collagen bundles that form acellular nodelike structures in the deep dermal portion of the keloid lesion. The center of keloid lesions also contains a paucity of cells in comparison to hypertrophic scars, which have islands composed of aggregates of fibroblasts, small vessels, and collagen fibers throughout the dermis.

 

l

Keloid scars is made up of –
a) Dense collagen b) Loose fibrous tissue
c Granulamatous tissue d) Loose areolar tissue

What is true about keloids – (JIPMER 95)
a)It appears immediately after surgery
b)It appears a few days after surgery
c)It is limited in its distribution (grows beyond the limits of the original wound)
d) it is common in old people

Keloid is best treated by – (UPSC 95)
a)Intrakeloidal injection of triamcinolone
b)Wide excision and grafting
c)Wide excision and suturing
d)Deep X-ray therapy

The following statement about keloid is true- A) They do not extend in normal skin   (extreme overgrowth of scar tissue that grows beyond the limits of the original wound)

b)Local recurrence is common after excision

c) They often undergo malignant change

d) They are more common in whites than in blacks

 

The best cure rate in keloids is achieved by –
a)Superficial X – ray therapy (UPSC 2001)
b)Intralesional injection of triamcinolone
c)Shaving
d)Excision and radiotherapy

Combination is always better.

Surgery:-Excision alone of keloids is subject to a high recurrence rate, ranging from 45 to 100%. There are fewer recurrences when surgical excision is combined with other modalities such as intralesional corticosteroid injection, topical application of silicone sheets, or the use of radiation or pressure

Radiation:-Poor results with 10 to 100% recurrence when used alone. It is more effective when combined with surgical excision. Given the risks of hyperpigmentation, pruritus, erythema, paresthesias, pain, and possible secondary malignancies, radiation should be reserved for adults with scars resistant to other modalities.

Combination therapies:- Intralesional corticosteroid injections decrease fibroblast proliferation, collagen and glycosaminoglycan synthesis, the inflammatory process, and TGF levels. When used alone, however, there is a variable rate of response and recurrence, therefore steroids are recommended as first-line treatment for keloids and second-line treatment for HTSs if topical therapies have failed. Intralesional injections are more effective on younger scars. They may soften, flatten, and give symptomatic relief to keloids, but they cannot make the lesions disappear nor can they narrow wide HTSs. Success is enhanced when used in combination with surgical excision. Serial injections every 2 to 3 weeks are required.

Sabiston:- Intralesional injection of steroids into a keloid scar can inactivate and shrink the scar; such therapy is not indicated for hypertrophic scars.

Scars that are perpendicular to the underlying muscle fibers tend to be flatter and narrower, with less collagen formation than when they are parallel to the underlying muscle fibers. The position of an elective scar can be chosen in such a way to make a narrower and less obvious scar in the distant future. As muscle fibers contract, the wound edges become reapproximated if they are perpendicular to the underlying muscle. If, however, the scar is parallel to the underlying muscle, contraction of that muscle tends to cause gaping of the wound edges and leads to more tension and scar formation.

____________________________________________________________________________________________________________________________________________________________________________

Wounds

Primary closure of incised wounds must be done in –
a) 2 hrs b) 4 hrs
c) 6 hrs d) 12 hrs
e) 16 hrs

(Because of the fear of bacterial invasion, primary wound closure beyond 6 to 8 hours after injury was historically proscribed. However, several scientific studies have since shown that when blood supply to a wound is adequate and bacterial invasion is absent, wounds can be safely closed at any time after proper débridement and irrigation)

The tensile strength of wound reaches that of normal tissue by – (PGI 88)
) 6 weeks
c) 4 months
b) 2 months
d) 6 months

NEVER

In the healing of a clean wound the maximum immediate strength of the wound is reached by –
a) 2 – 3 days b) 4 – 7 days
10 – 12 days d) 13 – 18 days

21 days is ans

The tensile strength of the wound starts and increases after – (MAHE 05)
a)Immediate suture of the wound
b)3 to 4 days
c)7-10 days
d 6 months

see figure

When is the maximum collagen content of wound
tissue – (PGI 81, ROHTAK 87)
a)Between 3rd to 5th day
b)Between 6th to 17th day
C) Between 17th to 21st day d) None of the above

In a sutured surgical wound, the process of epithelialization is completed within – (UPSC 07)
a) 24 hours b) 48 hours
c) 72 hours d) 96 hours

Ref schwartz Epithelialization:- While tissue integrity and strength are being re-established, the external barrier must also be restored. This process is characterized primarily by proliferation and migration of epithelial cells adjacent to the wound The process begins within 1 day of injury and is seen as thickening of the epidermis at the wound edge.Re-epithelialization is complete in less than 48 hours in the case of approximated incised wounds, but may take substantially longer in the case of larger wounds, in which there is a significant epidermal/dermal defect.

Sabiston : – Finally, adequate dressing of the closed wound isolates it from the outside environment. Providing an appropriate dressing for 48 to 72 hours can decrease wound contamination. However, dressings after this period increase the subsequent bacterial count on adjacent skin by altering the microenvironment underneath the dressing.

Following are required for wound healing except – a) Zinc
b) Copper c) Vitamin C d) Calcium

Copper is also a component of ferroprotein, a transport protein involved in the basolateral transfer of iron during absorption from the enterocyte. As such, copper plays a role in iron metabolism, melanin synthesis, energy production, neurotransmitter synthesis, and CNS function; the synthesis and cross-linking of elastin and collagen :- Harrison

Copper Deficiency:- Anemia, growth retardation, defective keratinization and pigmentation of hair, hypothermia, degenerative changes in aortic elastin, osteopenia, mental deterioration.

Patient has lacerated untidy wound of the leg and attended the casualty after 2 ‘hours. His wound (AIIMS 84)should be –
a) Sutured immediately  b) Debrided and sutured immediately  c) debrided and sutured secondarily d) Cleaned and dressed

Wound healing is worst at –
(ALL INDIA 93) a) Sternum b) Anterior neck
c) Eyelid d) Lips

After closing deep tissues and replacing significant tissue deficits, skin edges should be reapproximated for cosmesis and to aid in rapid wound healing. Skin edges may be quickly reapproximated with stainless steel staples or nonabsorbable monofilament sutures. Care must be taken to remove these from the wound before epithelialization of the skin tracts where sutures or staples penetrate the dermal layer. Failure to remove the sutures or staples by 7 to 10 days after repair will result in a cosmetically inferior wound

(Anatomic areas where tension is excessive are avoided if possible. The shoulders, back, and anterior chest are high tension and mobile areas where wide scarring is difficult to avoid. Patients are also questioned as to propensity for development of hypertrophic scars or keloid formation. Ears, anterior chest, and shoulders are areas prone to these problematic scars)

Sabiston :-Wound strength increases rapidly within 1 to 6 weeks and then appears to plateau up to 1 year after the injury .When compared with unwounded skin, tensile strength is only 30% in the scar. An increase in breaking strength occurs after approximately 21 days, mostly as a result of cross-linking.The rate of collagen synthesis declines after 4 weeks and eventually balances the rate of collagen destruction by collagenase (MMP-1). At this point the wound enters a phase of collagen maturation.

Taylor:-The tensile strength of the young scar is only about 10% that of normal skin. Scar strength increases to about 30–50% of normal skin by 4 weeks and to 80% after several months.

Robbins:-We now turn to the questions of how long it takes for a skin wound to achieve its maximal strength, and which substances contribute to this strength. When sutures are removed, usually at the end of the first week, wound strength is approximately 10% of the strength of unwounded skin, but it increases rapidly over the next 4 weeks. This rate of increase then slows at approximately the third month after the original incision and then reaches a plateau at about 70 to 80% of the tensile strength of unwounded skin, which may persist for life.

Schwartz:-Wound strength and mechanical integrity in the fresh wound are determined by both the quantity and quality of the newly deposited collagen. The deposition of matrix at the wound site follows a characteristic pattern: Fibronectin and collagen type III constitute the early matrix scaffolding, glycosaminoglycans and proteoglycans represent the next significant matrix components, and collagen type I is the final matrix. By several weeks postinjury the amount of collagen in the wound reaches a plateau, but the tensile strength continues to increase for several more months.20 Fibril formation and fibril cross-linking result in decreased collagen solubility, increased strength, and increased resistance to enzymatic degradation of the collagen matrix. Scar remodeling continues for many (6 to 12) months postinjury, gradually resulting in a mature, avascular, and acellular scar. The mechanical strength of the scar never achieves that of the uninjured tissue.

image

 

Factors That Inhibit Wound Healing

Infection

Ischemia

Circulation

Respiration

Local tension

Diabetes mellitus

Ionizing radiation

Advanced age

Malnutrition

Vitamin deficiencies:- Vitamin C Vitamin A

Mineral deficiencies:-Zinc Iron

Exogenous drugs:-Doxorubicin (Adriamycin) Glucocorticosteroids

suture marks are to be avoided, skin sutures should be removed by -  a) hours b) 1 week
2 weeks d) 3 weeks

Epidermal skin sutures function for fine alignment of skin edges. Interrupted sutures are less constrictive than running sutures. The needle enters and exits the skin at 90 degrees in order to evert the skin edges. These skin sutures are removed as soon as adequate intrinsic bonding strength is sufficient. Skin sutures left in place too long result in an unsightly track pattern. On the other hand, sutures removed prematurely risk wound dehiscence. Nonabsorbable sutures on the face are typically removed after 5 days. Sutures in the hand, foot, or across areas that are acted on by motion are left for 14 days or longer .Alternatively, by employing the running intradermal suturing technique, the time constraints of suture removal may be disregarded, and these sutures may be left in place for a longer time without risking a track pattern scar. Finally, epidermal approximation can be achieved without suture using a medical-grade cyanoacrylate adhesive such as Dermabond. Such adhesives are applied across the coapted skin edges only and contribute no tensile strength. Tape closure strips such as Steri-Strips can be applied at the completion of wound closure to help splint the coapted skin edges.


 Guidelines for Day of Suture Removal by Area
BODY REGION REMOVAL (DAYS)
Scalp 6-8
Ear 10-14
Eyelid 3-4
Eyebrow 3-5
Nose 3-5
Lip 3-4
Face (other) 3-4
Chest, abdomen 8-10
Back 12-14
Extremities 12-14
Hand 10-14
Foot, sole 12-14

A patient with grossly contaminated wound presents 12 hours after an accident. His wound should be managed by – (UPSC 96)
a)Thorough cleaning and primary repair
b)Thorough cleaning with debridement of all dead and devitalised tissue without primary closure
c)Primary closure over a drain
d)Covering the defect with split skin graft after cleaning

Management of an open wound seen 12 hrs. after
the injury – (AIIMS 87)
a)Suturing
b)Debridement and suture
c)Secondary suturing
d)Heal by granulation

Delayed wound healing is seen in all except-(AP 96)
a) Malignancy b) Hypertension
c) Diabetes d) Infection

All of the following favour postoperative wound dehiscence except – (Karnat 05)
a)Malignancy
b)Vitamin B complex deficiency
c)Hypoproteinaemia
d)Jaundice

Fibroblast in healing wound derived from –
a) Local mesenchyme b) Epithelium (PGI 98)
c) Endothelial d) Vascular fibrosis

(Sabiston) Fibroplasia:- Fibroblasts are specialized cells that differentiate from resting mesenchymal cells in connective tissue; they do not arrive in the wound cleft by diapedesis from circulating cells. After injury, the normally quiescent and sparse fibroblasts are chemoattracted to the inflammatory site, where they divide and produce the components of the ECM.The primary function of fibroblasts is to synthesize collagen, which they begin to produce during the cellular phase of inflammation. The time required for undifferentiated mesenchymal cells to differentiate into highly specialized fibroblasts accounts for the delay between injury and the appearance of collagen in a healing wound. This period, generally 3 to 5 days, depending on the type of tissue injured, is called the lag phase of wound healing.The rate of collagen synthesis declines after 4 weeks and eventually balances the rate of collagen destruction by collagenase (MMP-1). At this point the wound enters a phase of collagen maturation. The maturation phase continues for months or even years. Glycoprotein and mucopolysaccharide levels decrease during the maturation phase, and new capillaries regress and disappear. These changes alter the appearance of the wound and increase its strength.

Degloving injury is – (KERALA 2K)
a) Surgeon made wound b) Lacerated wound
c) Blunt injury d) Avulsion injury
e)Abrasive wound

Avulsion injuries are open injuries where there has been a severe degree of tissue damage. Such injuries occur when hands or limbs are trapped in moving machinery, such as in rollers, producing a degloving injury. Degloving is caused by shearing forces that separate tissue planes, rupturing their vascular interconnections and causing tissue ischaemia. This most frequently occurs between the subcutaneous fat and deep fascia. Degloving injuries can be open or closed. Degloving can be localised or circumferential. It can occur only in the single, subcutaneous plane, but where present in multiple planes, such as between muscles and fascia and between muscles and bone, is an indication of a severe high-energy injury with a limited potential for primary healing. Similar injuries occur as a result of runover road traffic accident injuries where friction from rubber tyres will avulse skin and subcutaneous tissue from the underlying deep fascia (Fig. 3.11). The history should raise the examiner’s suspicion and it is often possible to pinch the skin and lift it upwards revealing its detachment from the normal anchorage. The danger of degloving or avulsion injuries is that there is devascularisation of tissue and skin necrosis may become slowly apparent in the following few days. Even tissue that initially demonstrates venous bleeding may subsequently undergo necrosis if the circulation is insufficient. Treatment of such injuries is to identify the area of devitalised skin and to remove the skin, defat it and reapply it as a full-thickness skin graft. Avulsion injuries of hands or feet may require immediate flap cover using a one-stage microvascular tissue transfer of skin and/or muscle.

In treatment of hand injuries, the greatest priority is – (A1 96)
a)Repair of tendons
b)Restoration of skin cover
c)Repair of nerves
d) Repair of blood vessels

During the surgical procedure – (AIIMS 83)
a)Tendons should be repaired before nerves
b)Nerves should be repaired before tendons
c)Tendons should not be repaired at the same time
d)None is true

In hand injuries first to be repaired is – (A195)
a) Bone b) Tendon
c) Muscle d) Nerve

In the case of injuries, treatment is directed at the specific structures damaged: skeletal, tendon, nerve, vessel, and integument. In emergency situations, the goals of treatment are to maintain or restore distal circulation, obtain a healed wound, preserve motion, and retain distal sensation. Stable skeletal architecture is established in the primary phase of care because skeletal stability is essential for effective motion and function of the extremity. This also results in reestablishing skeletal length, straightening deformities, and correction of compression or kinking of nerves and vessels. Arteries are also repaired in the acute phase of treatment to maintain distal tissue viability. Additionally, extrinsic compression on arteries must be released emergently such as in compartment pressure problems. In clean-cut injuries, tendons can be repaired primarily. In situations in which there is a chance that tendon adhesions may form, such as when there are associated fractures, it is nonetheless better to repair tendons primarily with preservation of their length and if necessary at a later date to perform tenolysis. However, when there are open and contaminated wounds or a severe crushing injury, it is best to delay repair of both tendon and nerve injuries

Prevention of wound infection done by –
a)Pre-op shaving (PGI  05)
b)Pre-op antibiotic therapy
c)Monofilament sutures
d)Wound apposition

SSIs are the most common nosocomial infection in our population and constitute 38% of all infections in surgical patients. By definition, they can occur anytime from 0 to 30 days after the operation or up to 1 year after a procedure that has involved the implantation of a foreign material (mesh, vascular graft, prosthetic joint, and so on). Incisional infections are the most common; they account for 60% to 80% of all SSIs and have a better prognosis than organ/space-related SSIs do, with the latter accounting for 93% of SSI-related mortalities.

Preoperative shaving has been shown to increase the incidence of SSI after clean procedures as well. This practice increases the infection rate about 100% as compared with removing the hair by clippers at the time of the procedure or not removing it at all, probably secondary to bacterial growth in microscopic cuts. Therefore, the patient is not shaved before an operation. Extensive removal of hair is not needed, and any hair removal that is done is performed by electric clippers with disposable heads at the time of the procedure and in a manner that does not traumatize the skin

1.Basic principles include size of the OR, air management (filtered flow, positive pressure toward the outside, and air cycles per hour), equipment handling (disinfection and cleansing), and traffic rules. All OR personnel wear clean scrubs, caps, and masks, and traffic in and out of the OR is minimized.

2.The CDC recommends the use of chlorhexidine showers, and it is reasonable to implement such a policy, particularly in patients who have been in the hospital for a few days and in those in whom an SSI will cause significant morbidity (cardiac, vascular, and prosthetic procedures). Skin preparation of the surgical site is done with a germicidal antiseptic such as tincture of iodine, povidone-iodine, or chlorhexidine. An alternative preparation is the use of antimicrobial incise drapes applied to the entire operative area. Traditionally, the surgical team has scrubbed their hands and forearms for at least 5 minutes the first time in the day and for 3 minutes every consecutive time.

3.As many as 90% of an operative team puncture their gloves during a prolonged operation. The risk increases with time, as does the risk for contamination of the surgical site if the glove is not changed at the moment of puncture. The use of double gloving is becoming a popular practice to avoid contamination of the wound, as well as exposure to blood by the surgical team. Double gloving is recommended for all surgical procedures.Instruments that will be in contact with the surgical site are sterilized in standard fashion, and protocols for flash sterilization or emergency sterilization, or both, must be well established to ensure the sterility of instruments and implants.

Local Wound Related:-Intraoperative measures include appropriate handling of tissue and assurance of satisfactory final vascular supply, but with adequate control of bleeding to prevent hematomas/seromas. Complete débridement of necrotic tissue plus removal of unnecessary foreign bodies is recommended, as well as avoiding the placement of foreign bodies in clean-contaminated, contaminated, or dirty cases. Monofilament sutures have proved in experimental studies to be associated with a lower rate of SSI. Sutures are foreign bodies that are used only when required. Suture closure of dead space has not been shown to prevent SSI. Large potential dead spaces can be treated with the use of closed-suction systems for short periods, but these systems provide a route for bacteria to reach the wounds and may cause SSI. Open drainage systems (e.g., Penrose) increase rather than decrease infections in surgical wounds and are avoided unless used to drain wounds that are already infected.

In heavily contaminated wounds or wounds in which all the foreign bodies or devitalized tissue cannot be satisfactorily removed, delayed primary closure minimizes the development of serious infection in most instances. With this technique, the subcutaneous tissue and skin are left open and dressed loosely with gauze after fascial closure. The number of phagocytic cells at the wound edges progressively increases to a peak about 5 days after the injury. Capillary budding is intense at this time, and closure can usually be accomplished successfully even with heavy bacterial contamination because phagocytic cells can be delivered to the site in large numbers. Experiments have shown that the number of organisms required to initiate an infection in a surgical incision progressively increases as the interval of healing increases, up to the fifth postoperative day.

Finally, adequate dressing of the closed wound isolates it from the outside environment. Providing an appropriate dressing for 48 to 72 hours can decrease wound contamination. However, dressings after this period increase the subsequent bacterial count on adjacent skin by altering the microenvironment underneath the dressing.

Elective cholecystectomy is – (APPG 06)
a) Clean contaminated b) Clean
Dirty d) Contaminated

Which one of the following surgical procedures is considered to have a clean-contaminated wound ?

a),Elective open cholecystectomy for cholelithiasis
b)Hemiorrhaphy with mesh repair
c)Lumpectomy with axillary node dissection
d)Appendectomy with walled off abscess

The accepted range of infection rates has been 1% to 5% for clean, 3% to 11% for clean-contaminated, 10% to 17% for contaminated, and greater than 27% for dirty wounds.

Table 14-2 Surgical Wound Classification According to Degree of Contamination
WOUND CLASS DEFINITION
Clean An uninfected operative wound in which no inflammation is encountered and the respiratory, alimentary, genital, or infected urinary tract is not entered. Wounds are closed primarily and, if necessary, drained with closed drainage. Surgical wounds after blunt trauma should be included in this category if they meet the criteria
Clean-contaminated An operative wound in which the respiratory, alimentary, genital, or urinary tract is entered under controlled conditions and without unusual contamination
Contaminated Open, fresh, accidental wounds. In addition, operations with major breaks in sterile technique or gross spillage from the gastrointestinal tract and incisions in which acute, nonpurulent inflammation is encountered are included in this category
Dirty Old traumatic wounds with retained devitalized tissue and those that involve existing clinical infection or perforated viscera. This definition suggests that the organisms causing postoperative infection were present in the operative field before the operation

Staphylococcus aureus remains the most common pathogen in SSIs, followed by coagulase-negative staphylococci, enterococci, and Escherichia coli. However, for clean-contaminated and contaminated procedures, E. coli and other Enterobacteriaceae are the most common cause of SSI.

 

The Vitamin which has inhibitory effect on wound healing is – (MAHE 05)
a) Vitamin-A b) Vitamin-E
c) Vitamin-C d) Vitamin B-complex

Golden period for treatment of open wounds is
….hours – (AIIMS 86, 88)
a) 4 b) 6
c) 12 d) 24

In the first 4 hours after a breach in an epithelial surface and underlying connective tissues made during surgery or trauma, there is a delay before host defences can become mobilised through acute inflammatory, humoral and cellular processes. This period is called the ‘decisive period’ and it is during these first 4 hours after incision that bacterial colonisation and established infection can begin. It is logical that prophylactic antibiotics will be most effective during this time.

Abbey-Estlander flap is used in the reconstruction
of- (AI 05)
a) Buccal mucosa b) Lip
c) Tongue d) Palate

In defects of less than one third the horizontal length, enough redundancy is present to allow primary closure. More complex decisions must be made for defects that are between one third and two thirds of the total lip length. The two categories of lip flap technique are transoral cross-lip flaps and circumoral advancements flaps. Cross-lip flaps include the Abbé flap and the Estlander flap. The Abbé flap was originally designed to reconstruct central upper lip (tubercle) defects with lower lip full-thickness tissue vascularized by one of the labial arteries.The technique requires a second-stage procedure for division of the pedicle. The Estlander flap is similar in principle but is based laterally at the oral commissure and is used to reconstruct lateral upper or lower lip lesions. Both the Estlander and Abbé flaps are denervated, but sensation and perhaps even motor function return over months.The Karapandzic technique is an advancement-rotation flap technique designed for central lower lip defects. Although good function, sensation, and mobility are preserved, a side effect is reduction in the size of the oral aperture. The Webster-Bernard technique uses cheek tissue advancement flaps to replace defects with full-thickness or partial-thickness cheek incisions extended laterally from the commissure (Fig. 45-34). When performed bilaterally, both the Karapandzic and the Webster-Bernard methods can be used to reconstruct a complete upper or lower lip.

imageimageimage

 

Abbé flap upper lip reconstruction. A. Defect and flap design.                     B. Rotation of the flap and primary closure of the donor site.                                     C. Division of the pedicle (after 2 to 3 weeks) and final insetting.

Cock’s peculiar tumour is-(UPSC 86,NIMHANS 87,
a)Papilloma Kerala 87, TN 90 )
b)Infected sebaceous cyst
c)Cylindroma
d)Sqaumous cell carcinoma (RESEMBLES SCC but it’s not SCC)

COCK

Epidermoid cyst(syn. sebaceous cyst, wen)
These cysts contain keratin and its breakdown products, surrounded by a wall of stratified squamous keratinising epithelium (the commonly used term sebaceous cyst is incorrect — these cysts only rarely have associated sebaceous glands and do not contain sebum). Epidermoid cysts often have a punctum. They are inherited in an autosomal dominant fashion. The common sites are the face, neck, shoulders and chest, areas favoured by acne vulgaris. Lesions may be solitary but are commonly multiple. They enlarge slowly and may become inflamed and tender from time to time. Suppuration may occur. The contents of an infected cyst become semiliquid and usually very foetid. Recurrent infective episodes cause the cyst wall to become adherent to surrounding subcutaneous tissue, and consequently more difficult to remove. If ulceration occurs it can resemble squamous cell carcinoma to which the term ‘Cock’s peculiar tumour’ may be applied .The contents of a cyst sometimes escape slowly from the duct orifice and dry in successive layers on the skin, forming a ‘sebaceous horn’.Treatment is by surgical excision (except if inflamed, when it is better incised and drained). This can be performed under local anaesthesia; an ellipse of skin including the punctum is removed with the cyst. Unless the wall is completely removed, recurrence is likely.

Cause of persistance of a sinus or fistulae includes-
a)Foreign body (JIPMER 86)
b)Non dependentt drainage
c)Unrelieved Obstruction
d)Presence of malignancy
e)All of the above

FISTULA

Sinuses and fistulas
A sinus is a blind track (usually lined with granulation tissue) leading from an epithelial surface into the surrounding tissues. Pathological sinuses must be distinguished from normal anatomical sinuses (e.g. the frontal and nasal sinuses). A fistula  is an abnormal communication between the lumen or surface of one organ and the lumen or surface of another, or between vessels. Most fistulas connect epithelial­lined surfaces .Sinuses and fistulas may be congenital or acquired. Forms which have a congenital origin include preauricular sinuses, branchial fistulas , tracheo-oesophageal fistulas  and arteriovenous fistulas.The acquired forms often follow inadequate drainage of an abscess. Thus, a perianal abscess may burst on the surface and lead to a sinus (erroneously termed a blind external ‘fistula’). In other cases, the abscess opens both into the anal canal and on to the surface of the perineal stem resulting in a true fistula-in-ano .Acquired arteriovenous fistulas are caused by trauma or operation (for renal dialysis).
  Persistence of a sinus or fistula
  The reason for this will be found among the following:
•  a foreign body or necrotic tissue is present, e.g. a suture, hairs, a sequestrum, a faecolith or even a worm (see below);
•  inefficient or nondependent drainage: long, narrow, tortuous track predisposes to inefficient drainage;
•  unrelieved obstruction of the lumen of a viscus or tube distal to the fistula;
•  high pressure, such as occurs in fistula-in-ano due to the normal contractions of the sphincter which force faecal material through the fistula;
•  the walls have become lined with epithelium or endothelium (arteriovenous fistula);
•  dense fibrosis prevents contraction and healing;
•  type of infection, e.g. tuberculosis or actinomycosis;
•  the presence of malignant disease
•  ischaemia;
•  drugs, e.g. steroids, cytotoxics;
•  malnutrition;
•  interference, e.g. artefacta;
•  irradiation, e.g. rectovaginal fistula after treatment for a carcinoma of the cervix;
•  Crohn’s disease;
• high-output fistula, e.g. duodenocutaneous fistula.

Premalignant conditions of the skin include –
a)Bowen disease (JIPMER 86)
b)Pagel’s disease of nipple
c)Leukoplakia
d)Solar keratosis
e)All of the above

Premalignant lesions :-Actinic keratoses
Bowen’s disease
Erythroplasia of Querat
Radiodermatitis
Chronic scars(A carcinoma which develops in a scar (Marjolin’s ulcer) )
Sebaceous epidermal naevus
Porokeratosis

 

Melanoma should be excised with a margin of –
a) 2 cm b) 5 cm (UPSC 88)
c) 7 cm d) 10 cm

image

 

Harrison also recommends same treatment for Melanoma as described in above figure.

Hidradenitis suppurativa. is found to occur in – (JIPMER 86, AIMS 87)
a) Axilla b) Circumanal
c) Scalp d) Groin

Hidradenitis suppurativa. :- This is a chronic infection of apocrine glands around the anal margin giving rise to numerous sinuses. The mons pubis and groin can also be affected. After excision of the area, granulation and healing ate accelerated by using Silastic foam dressing (Hughes).

The term universal tumour refers to – (PGI 88)
a) Adenoma b) Papilloma
c) Fibroma d) Lipoma

Lipoma
A lipoma is a slowly growing tumour composed of fat cells adult type. Lipomas may be encapsulated or diffuse. It occur anywhere in the body where fat is found and earn tl titles of the ‘universal tumour’ or the ‘ubiquitous tumour The head and neck area, abdominal wall and thighs are particularly favoured sites.

Hydrocele is a type of ….cyst – (PGI 88)
a) Retention b) Distension
c) Exudation d) Traumatic

Acquired cysts
Retention cysts are due to the accumulated secretion of a gland behind an obstruction of a duct. Examples are seen in the pancreas, the parotid, the breast, the epididymis and Bartholin’s gland. A sebaceous cyst starts with the obstruction of a sebaceous gland, but this is followed by the down-growth and the accumulation of desquamated epidermal cells, thus turning it into an epidermoid cyst. In the epididymis, if the retention cyst contains sperms, it is known as a ‘spermatocele’.

Distension cysts occur in the thyroid from dilatation of the acini, or in the ovary from a follicle. Lymphatic cysts and cystic hygromas are distension cysts.

Exudation cysts occur when fluid exudes into an anatomical space already lined by endothelium, e.g. hydrocele, a bursa, or when a collection of exudate becomes encrusted.

Cystic tumours. Examples are cystic teratomas (dermoid cyst of the ovary) and cystadenomas (pseudomucinous and serous cystadenoma of the ovary).
Ganglia. Implantation dermoids arise from squamous epithelium which has been driven beneath the skin by a penetrating wound. They are classically found in the fingers of women who sew assiduously and metal workers.

 

Sebaceous cyst does not occur in the …. – (PGI 88)
a) Scalp b) Scrotum
c) Back d) Sole

Sebaceous cysts are common in the scrotal skin. They are usually small and multiple.

Fordyce spots are – (All India 95)
a)Ectopic sebaceous glands
b)Ectopic eccrine
c)Ectopic apocrine
d)Ectopic mucossal glands

Broke’s tumor is a tumor of–
a)Superficial dermal vesels
b)Sweat glands
c)Hair follicles
d)Sebaceous glands

 

Commonest site for rodent ulcer is – (PGI 88)
a) Inner canthus b) Outer canthus
c) Angle of mouth d) Cheek

Squamous cell carcinoma can arise from-(PGi88)
a)Long standing venous ulcers
b)chronic lupus vulgaris
c)Rodent ulcer
d)All of the above

There is a strong correlation with damage to the skin by the sun , and can be experimentally produced by ultraviolet light. Occa­sionally it arises as a complication of long-standing chronic granulomas, such as syphilis, lupus vulgaris and leprosy, chronic ulcers, osteomyelitis, Hydradenitis suppurativa, long-standing venous ulcers or old burn scars

The best results in treatment of capillary nevus have been achieved by – (AIIMS 84)
a)Full thickness skin graft
b)Dermabrasion
c)Tatooing
d)Argon laser treatment

Capillary malformation, usually referred to as a port-wine stain or nevus flammeus, is the most common type of vascular malformation

Vascular malformations:-These are structural and morphological anomalies due to faulty embryological morphogenesis. The lesions are present at birth, grow commensurate with the child and do nor regress. They can lead to underlying soft tissue or bony hypertrophy, nodular development and discoloration as a consequence of blood vessel ectasia with age. The natural history of these lesions is determined by their haemodynamic and Iymphodynamic characteristics.
• High-flow lesions include arterial malformations and arteriovenous malformations (arterial plexiform angiomas, cirsoid aneurysm).
• Low-flow lesions include lymphatic (LM) venous (VM) and capillary (CM — port-wine stain). Frequently these lesions combine arterial, venous and lymphatic elements.
Port-wine stains:-Port-wine stains are intradermal capillary mal­formations that change very little throughout life, although the colour may alter a little and they may become nodular in some areas. Treatment is for reason of appearance. Treatment of choice for these lesions is the use of the pulsed tunable dye laser.

Eleven month old child presents with erythematous lesion with central clearing which has been decreasing in size – (Al 97)
a)Strawberry angioma
b)Nevus
c)Portwine stain
d)Cavernous haemangioma

Malignant melanoma most often develops from –
a)Hairy naevus (SGPGI 05)
b)Junctional naevus
c)Intradermal naevus
d)Blue naevus

 

The aim of differential diagnosis is to distinguish benign pigmented lesions from melanoma and its precursor. If melanoma is a consideration, then biopsy is appropriate. Some benign look-alikes may be removed in the process of trying to detect authentic melanoma. Table 83-5 summarizes the distinguishing features of benign lesions that may be confused with melanoma.

nevus

Full thickness skin graft can be taken from the following sites except – (AIIMS 87)
a) Elbow b) Back to neck
c) Supraclavicular area d) Upper eyelids

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