General Surgery Principles Practice Questions

Q: In a multilayered wound, the deep layer is sutured by chromic gut. This is done because chromic gut sutures have:

Delayed resorption. **Explanation:** The correct answer is **C. Delayed resorption.** **Medical Concept:** Chromic gut is a natural absorbable suture derived from the submucosa of sheep intestine or serosa of bovine intestine. Plain catgut is absorbed rapidly (7–10 days) due to proteolytic enzymatic digestion. To improve its clinical utility, the gut is treated with **chromium salts (chromic acid)**. This treatment causes cross-linking of collagen fibers, which makes the suture more resistant to enzymatic degradation. Consequently, chromic gut maintains its tensile strength for a longer period (14–21 days) and takes longer to be completely resorbed (up to 90 days) compared to plain gut. In multilayered closures, the deep layers require prolonged support to prevent dehiscence while the tissue heals. **Analysis of Incorrect Options:** * **A. Increased strength:** While chromic treatment preserves strength for a longer duration, it does not significantly increase the initial knot-pull strength compared to plain gut of the same gauge. * **B. Increased ease of use:** Chromic gut is often stiffer and has more "memory" than plain gut, making it slightly more difficult to handle and knot securely. * **D. Less tissue irritation:** Being a foreign animal protein, chromic gut actually causes a **marked inflammatory tissue reaction**. Synthetic absorbable sutures (like Vicryl) are preferred when minimal irritation is required. **High-Yield NEET-PG Pearls:** * **Mechanism of Absorption:** Natural sutures (Gut) are absorbed by **proteolysis/enzymatic digestion**, whereas synthetic sutures (Vicryl, PDS) are absorbed by **hydrolysis**. * **Contraindication:** Never use chromic gut in infected tissues or the biliary/urinary tracts, as it can act as a nidus for stone formation or degrade prematurely. * **Fastest absorbing suture:** Plain catgut. * **Longest strength retention (Absorbable):** PDS (Polydioxanone).

Q: Which type of ulcer is likely to develop in a long-standing chronic venous ulcer?

Marjolin ulcer. ### Explanation **Correct Answer: A. Marjolin ulcer** A **Marjolin ulcer** refers to a squamous cell carcinoma (SCC) that arises in areas of chronic inflammation, long-standing scars, or non-healing wounds. The most common precursors are **chronic venous stasis ulcers**, old burn scars (cicatrix), and chronic osteomyelitis sinuses. The underlying pathophysiology involves constant cellular turnover and chronic irritation, which eventually leads to malignant transformation. These ulcers are typically painless (as they destroy local sensory nerves) but are characterized by everted edges and a foul-smelling discharge. **Why the other options are incorrect:** * **B. Aphthous ulcer:** These are small, painful, shallow ulcers found on the mucous membranes of the mouth (canker sores). They are not associated with chronic venous disease or malignancy. * **C. Bazin ulcer (Erythema Induratum):** This is a form of panniculitis (inflammation of subcutaneous fat) associated with Tuberculosis. It typically presents as tender, nodules on the calves of young women that may ulcerate. * **D. Aerial ulcer:** This is not a standard medical term for a specific type of chronic or malignant ulcer. **High-Yield Clinical Pearls for NEET-PG:** * **Most common histological type:** Squamous Cell Carcinoma (SCC) is the most frequent, though Basal Cell Carcinoma (BCC) can rarely occur. * **Characteristic Feature:** Marjolin ulcers are generally **more aggressive** and have a higher rate of metastasis compared to primary SCC of the skin. * **Diagnosis:** Any chronic ulcer showing sudden growth, everted edges, or bleeding should undergo an **edge biopsy** to rule out malignancy. * **Latency:** The average time for malignant transformation is 25–30 years.

Q: Splenectomy is indicated in:

Hereditary spherocytosis. **Explanation:** **Hereditary Spherocytosis (HS)** is the correct answer because it is the most common hemolytic anemia for which splenectomy is indicated. In HS, a defect in red blood cell (RBC) membrane proteins (like spectrin or ankyrin) results in spherical, rigid cells. These spherocytes are prematurely trapped and destroyed by splenic macrophages in the cords of Billroth. Splenectomy does not cure the membrane defect but significantly increases RBC lifespan, effectively resolving the anemia and preventing complications like pigment gallstones. **Why other options are incorrect:** * **Sickle Cell Anemia:** Splenectomy is rarely indicated because these patients undergo "autosplenectomy" due to repeated infarctions by early childhood. Surgery is only considered for specific complications like acute splenic sequestration or a rare splenic abscess. * **Haemoglobin C Disease:** This usually presents as a mild hemolytic anemia that rarely requires surgical intervention. * **Hodgkin’s Lymphoma:** Historically, "staging laparotomy" with splenectomy was common. However, with modern PET-CT imaging and advanced chemotherapy protocols, splenectomy is no longer a standard part of management. **Clinical Pearls for NEET-PG:** * **Timing:** In HS, splenectomy is ideally deferred until age 5–6 to reduce the risk of Overwhelming Post-Splenectomy Infection (OPSI). * **Vaccination:** Patients must receive vaccinations against encapsulated organisms (*S. pneumoniae, H. influenzae, N. meningitidis*) at least 2 weeks before elective surgery. * **Peripheral Smear:** Post-splenectomy, look for **Howell-Jolly bodies**, Pappenheimer bodies, and Heinz bodies. * **Concomitant Procedure:** Always screen for gallstones in HS patients; if present, a cholecystectomy should be performed during the same session.

Q: Gut suturing material is absorbed by which process?

Hydrolysis. **Explanation:** Suture materials are classified based on their absorption profile. The mechanism of absorption depends entirely on whether the suture is **natural** or **synthetic**. **Why Hydrolysis is Correct:** Modern synthetic absorbable sutures (e.g., **Vicryl/Polyglactin 910, Monocryl, PDS**) are broken down by **Hydrolysis**. This is a non-enzymatic process where water molecules penetrate the polymer chains, causing them to fragment. This process is predictable and causes minimal tissue reaction, making it the preferred mechanism for most surgical procedures. **Analysis of Incorrect Options:** * **Proteolysis (Option D):** This is the mechanism for **Natural** absorbable sutures (e.g., **Surgical Catgut**). Catgut is derived from bovine or ovine intestinal submucosa/serosa. Being a foreign protein, it is degraded by lysosomal enzymes from inflammatory cells (proteolysis). This process is unpredictable and causes significant tissue inflammation. * **Oxidation (Option A):** This is not a standard mechanism for suture degradation. While some materials may undergo oxidative stress in the body, it is not the primary mode of absorption for surgical gut or synthetic sutures. * **Fibrinolysis (Option C):** This refers to the breakdown of fibrin clots in the blood coagulation cascade and is unrelated to the degradation of suture polymers. **NEET-PG High-Yield Pearls:** * **Fastest Absorption:** Plain Catgut (loses strength in 7-10 days). * **Longest Strength Retention:** PDS (Polydioxanone) – ideal for slow-healing tissues like fascia. * **Vicryl (Polyglactin 910):** A braided synthetic suture absorbed by hydrolysis; it is the most commonly used suture in general surgery. * **Key Distinction:** Natural = Proteolysis (High inflammation); Synthetic = Hydrolysis (Low inflammation).

Q: Petersen hernia is defined as:

An internal hernia located behind the Roux-en-Y limb. **Explanation:** **Petersen’s Hernia** is a type of internal hernia that occurs through **Petersen’s space**. This space is a potential defect created between the mesentery of the Roux-en-Y limb (alimentary limb) and the transverse mesocolon. It is a well-known complication following gastric bypass surgery (RYGB) or any Roux-en-Y reconstruction. * **Why Option A is Correct:** In a Roux-en-Y configuration, the lifted jejunal limb creates a gap behind it. If this space is not surgically closed, loops of the small bowel can herniate through it, leading to bowel obstruction, ischemia, or necrosis. * **Why Option B is Incorrect:** A hernia through the transverse mesocolon is specifically called a **Transmesocolic hernia**. This occurs if the defect created to pass the Roux limb (in retrocolic repairs) is not closed. * **Why Option C is Incorrect:** Cervical hernias are not a standard classification in general surgery; hernias in the neck region are usually related to discs (orthopedics) or lung apices (Sibson’s fascia). * **Why Option D is Incorrect:** A hernia through the epiploic foramen is known as a **Winslow’s foramen hernia**. **Clinical Pearls for NEET-PG:** 1. **Incidence:** Petersen’s hernia is more common in **Laparoscopic** Roux-en-Y Gastric Bypass compared to open surgery because laparoscopy results in fewer adhesions, allowing the bowel to move more freely into potential spaces. 2. **Presentation:** Patients often present with intermittent, "colicky" post-prandial abdominal pain before progressing to acute intestinal obstruction. 3. **Imaging:** On CT scan, look for the **"Swirl sign"** (torsion of the mesenteric vessels). 4. **Prevention:** The standard of care is the meticulous closure of both Petersen’s space and the mesenteric defect during the primary surgery.

Q: What is the most common form of shock?

Hypovolemic shock. **Explanation:** Shock is defined as a state of cellular and tissue hypoxia due to reduced oxygen delivery, increased oxygen consumption, or inadequate oxygen utilization. **1. Why Hypovolemic Shock is the Correct Answer:** Hypovolemic shock is statistically the **most common form of shock** encountered in clinical practice, particularly in surgical and emergency settings. It results from a decrease in intravascular volume, most frequently due to **hemorrhage** (trauma, GI bleed) or non-hemorrhagic fluid loss (vomiting, diarrhea, burns). In the context of trauma—a high-yield area for NEET-PG—hemorrhagic shock is the leading cause of preventable death. **2. Analysis of Incorrect Options:** * **Cardiogenic Shock:** Caused by primary pump failure (e.g., Myocardial Infarction). While common in cardiac ICUs, it is less frequent than hypovolemia in the general population. * **Neurogenic Shock:** A form of distributive shock caused by the loss of sympathetic tone following spinal cord injury. It is relatively rare. * **Septicemic (Septic) Shock:** A subset of distributive shock caused by a dysregulated host response to infection. While it is the most common cause of death in non-cardiac ICUs, it ranks second to hypovolemia in overall global incidence. **NEET-PG High-Yield Pearls:** * **Most common shock in trauma:** Hypovolemic (Hemorrhagic) shock. * **Most common cause of distributive shock:** Septic shock. * **Early sign of shock:** Tachypnea and Tachycardia (Note: Blood pressure may remain normal in "Compensated Shock"). * **The "Golden Hour":** The critical period following injury where rapid resuscitation from hypovolemic shock significantly improves survival.

Q: What is the recommended treatment for a strangulated hernia?

Immediate surgery. **Explanation:** A **strangulated hernia** is a surgical emergency where the blood supply to the herniated contents (usually bowel or omentum) is compromised, leading to ischemia, gangrene, and potential perforation. **Why "Immediate Surgery" is Correct:** The primary goal in strangulation is to restore blood flow or resect non-viable tissue. Once strangulation is suspected—characterized by a tense, tender, irreducible swelling with overlying skin changes and signs of intestinal obstruction—**immediate surgical exploration** is mandatory. Delaying surgery increases the risk of bowel necrosis, peritonitis, and sepsis, significantly raising morbidity and mortality rates. **Why Other Options are Incorrect:** * **Observation:** This is contraindicated as strangulation is a life-threatening condition that will not resolve spontaneously. * **Manual Reduction (Taxis):** This is **strictly contraindicated** in strangulated hernias. Forcing a potentially gangrenous bowel loop back into the peritoneal cavity can lead to "reduction en masse" or cause generalized peritonitis (reduction of necrotic bowel). * **Analgesics:** While pain management is part of supportive care, it does not treat the underlying vascular compromise and may mask worsening clinical signs. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Triad:** Irreducibility + Tenderness + Lack of cough impulse. * **Richter’s Hernia:** Only a part of the bowel wall is trapped; it can strangulate without causing complete intestinal obstruction. * **Maydl’s Hernia:** A "W-shaped" loop where the strangulated portion is located inside the abdomen, not in the hernia sac. * **Management Tip:** If a strangulated hernia reduces spontaneously during induction of anesthesia, the surgeon must still perform a laparotomy/laparoscopy to inspect the viability of the reduced bowel segment.

Q: Negative pressure dressing is used for which of the following indications?

Chronic non-healing diabetic ulcer. **Explanation:** **Negative Pressure Wound Therapy (NPWT)**, also known as Vacuum-Assisted Closure (VAC), is a gold-standard modality for managing complex wounds. **Why Option B is Correct:** NPWT is highly effective for **chronic non-healing diabetic ulcers** because it works through several mechanisms: * **Macro-strain:** Draws wound edges together, facilitating primary closure. * **Micro-strain:** Creates mechanical tension at the cellular level, stimulating angiogenesis and the formation of healthy **granulation tissue**. * **Exudate Management:** Continuously removes excess interstitial fluid and bacteria, reducing localized edema and improving capillary blood flow. **Why Other Options are Incorrect:** * **A. Removal of eschar:** NPWT is not a debridement tool. Wounds must be surgically debrided of all necrotic tissue and eschar before application; otherwise, the vacuum cannot reach the viable tissue. * **C. Unexplored fistulas:** NPWT is contraindicated in unexplored or non-enteric fistulas because the suction can worsen the tract or cause organ damage. * **D. Untreated osteomyelitis:** NPWT should not be applied over active, untreated bone infections as it may trap the infection and lead to sepsis. The infection must be treated with antibiotics and debridement first. **High-Yield Clinical Pearls for NEET-PG:** * **Absolute Contraindications:** Malignancy in the wound, untreated osteomyelitis, exposed vital organs/vessels, and necrotic tissue with eschar. * **Pressure Settings:** Usually maintained between **-75 mmHg to -125 mmHg** (continuous or intermittent). * **Key Benefit:** It significantly reduces the frequency of dressing changes and prepares the wound bed for subsequent skin grafting or flaps.

Question 1

In a multilayered wound, the deep layer is sutured by chromic gut. This is done because chromic gut sutures have:

Accepted Answer

Delayed resorption

Answer

Increased strength

Answer

Increased ease of use

Answer

Less tissue irritation

Question 2

Which type of ulcer is likely to develop in a long-standing chronic venous ulcer?

Accepted Answer

Marjolin ulcer

Answer

Aphthous ulcer

Answer

Bazin ulcer

Answer

Aerial ulcer

Question 3

Splenectomy is indicated in:

Accepted Answer

Hereditary spherocytosis

Answer

Sickle cell anaemia

Answer

Haemoglobin C disease

Answer

Hodgkin's lymphoma

Question 4

Gut suturing material is absorbed by which process?

Accepted Answer

Hydrolysis

Answer

Oxidation

Answer

Fibrinolysis

Answer

Proteolysis

Question 5

Petersen hernia is defined as:

Accepted Answer

An internal hernia located behind the Roux-en-Y limb

Answer

An internal hernia through the transverse mesocolon

Answer

A cervical hernia

Answer

A hernia through the epiploic foramen

Question 6

Which of the following is an evidence that splenectomy might benefit a patient with idiopathic thrombocytopenic purpura?

Accepted Answer

An increase in platelet count on corticosteroid therapy

Answer

A significantly enlarged spleen

Answer

A high reticulocyte count

Answer

Patient's age less than five years

Question 7

What is the most common form of shock?

Accepted Answer

Hypovolemic shock

Answer

Cardiogenic shock

Answer

Neurogenic shock

Answer

Septicemic shock

Question 8

Which of the following is NOT true about the components separation technique?

Accepted Answer

None of the above statements are true.

Answer

It is associated with a high wound infection risk.

Answer

Ramirez first described the technique.

Answer

It has a recurrence rate of around 20%.

Question 9

What is the recommended treatment for a strangulated hernia?

Accepted Answer

Immediate surgery

Answer

Observation

Answer

Manual reduction

Answer

Analgesics

Question 10

Negative pressure dressing is used for which of the following indications?

Accepted Answer

Chronic non-healing diabetic ulcer

Answer

Removal of eschar

Answer

Unexplored fistulas

Answer

Untreated osteomyelitis

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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