General Surgery Principles — MCQs

General Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 211: Proline is a:

A. Natural absorbable suture material
B. Synthetic absorbable suture material
C. Natural non absorbable suture material
D. Synthetic non absorbable suture material (Correct Answer)

Explanation: **Explanation:** **Proline (Polypropylene)** is a **synthetic, non-absorbable, monofilament** suture material. It is produced through the polymerization of propylene. Because it is synthetic, it is chemically inert and does not elicit a significant inflammatory response. Being non-absorbable, it maintains its tensile strength indefinitely within the body, making it the gold standard for tissues that require long-term support. **Analysis of Options:** * **Option A & B (Absorbable):** Incorrect. Proline does not undergo enzymatic degradation (natural) or hydrolysis (synthetic). It remains permanently in the tissue unless surgically removed. * **Option C (Natural Non-absorbable):** Incorrect. Natural non-absorbable materials include **Silk** (derived from silkworm cocoons) and **Linen**. Proline is man-made. * **Option D (Synthetic Non-absorbable):** **Correct.** Proline, along with Nylon (Polyamide) and Steel, falls into this category. **Clinical Pearls for NEET-PG:** 1. **Vascular Surgery:** Proline is the **suture of choice for vascular anastomoses** due to its high tensile strength, extreme smoothness (low tissue drag), and plasticity. 2. **Plastic Surgery:** It is preferred for skin closure (subcuticular) because its monofilament structure resists bacterial colonization (low risk of infection) and allows for easy removal. 3. **Abdominal Wall:** It is commonly used for **hernia repair (as mesh)** and sheath closure (Proline No. 1) because it provides permanent reinforcement. 4. **Memory:** Proline has high "memory," meaning it tends to return to its original shape (kinking); therefore, it requires more knots (usually 5-6) to ensure security.

Question 212: What is the recommended patient position for the surgical treatment of a pilonidal sinus?

A. Jack knife position (Correct Answer)
B. Sim's position
C. Prone position
D. Supine position

Explanation: **Explanation:** The **Jack-knife (Kraske) position** is the preferred surgical position for pilonidal sinus excision. In this position, the patient is prone with the hips flexed over a bolster or the break in the operating table, and the buttocks are taped apart. **Why Jack-knife is correct:** 1. **Optimal Exposure:** It provides the best visualization of the sacrococcygeal area and the natal cleft. 2. **Anatomical Access:** By flexing the hips and using adhesive tape to retract the buttocks laterally, the deep midline cleft is flattened, making it easier to identify sinus tracts and perform wide local excision or flap reconstruction (like the Limberg flap). 3. **Venous Drainage:** It helps in reducing venous congestion in the operative field compared to a flat prone position. **Why other options are incorrect:** * **Sim’s position:** This is a lateral decubitus position used primarily for rectal examinations or colonoscopy, but it does not provide the symmetrical exposure required for pilonidal surgery. * **Prone position:** While the patient is face down, a standard flat prone position does not adequately open the gluteal cleft, making deep dissection difficult. * **Supine position:** This is used for abdominal or anterior thoracic surgeries; the sacrococcygeal area is completely inaccessible. **High-Yield Clinical Pearls for NEET-PG:** * **Pilonidal Sinus:** Most commonly occurs in the **sacrococcygeal region** in young, hairy males ("Jeep driver’s disease"). * **Primary Treatment:** Wide local excision with healing by secondary intention or primary closure (e.g., **Bascom’s procedure** or **Limberg flap**). * **Jack-knife Position:** Also used for other proctological procedures like hemorrhoidectomy and anal fistula surgery. * **Anesthesia:** Usually performed under spinal or general anesthesia.

Question 213: Which location of the appendix pain is referred to the suprapubic region with pain on internal rotation of the hip?

A. Pre ileal
B. Pelvic (Correct Answer)
C. Post ileal
D. Paracolic

Explanation: **Explanation:** The clinical presentation of appendicitis varies significantly based on the anatomical position of the appendix. **1. Why Pelvic is Correct:** In a **Pelvic appendix**, the inflamed organ lies in close proximity to the **obturator internus muscle** and the urinary bladder. * **Suprapubic Pain:** Irritation of the bladder wall or pelvic peritoneum leads to referred pain in the suprapubic region and may cause urinary frequency or tenesmus. * **Obturator Sign:** Internal rotation of the flexed right hip stretches the inflamed obturator internus muscle, eliciting pain in the hypogastrium. This is a classic diagnostic sign for a pelvic appendix. **2. Why Other Options are Incorrect:** * **Pre-ileal/Post-ileal:** These positions are associated with irritation of the terminal ileum, often leading to diarrhea or "silent" presentations. Post-ileal appendicitis may present with pain referred to the right testicle due to irritation of the ureter/genitofemoral nerve. * **Paracolic:** This usually presents with localized right flank pain or right lower quadrant tenderness, similar to a subhepatic or retrocecal position, but does not involve pelvic structures. **3. NEET-PG High-Yield Clinical Pearls:** * **Retrocecal (75%):** Most common position. Presents with a positive **Psoas Sign** (pain on hip extension) and "silent" abdomen because the appendix is shielded from the anterior peritoneum. * **McBurney’s Point:** Corresponds to the base of the appendix. * **Sherren’s Triangle:** An area of hyperesthesia (formed by the umbilicus, ASIS, and symphysis pubis) used to clinically localize appendicitis. * **Alder’s Sign:** Used to differentiate appendicitis from uterine pain in pregnancy.

Question 214: What is the most important aspect of management of burn injury in the first 24 hours?

A. Fluid resuscitation (Correct Answer)
B. Dressing
C. Escharotomy
D. Antibiotics

Explanation: ### Explanation **Correct Answer: A. Fluid Resuscitation** The primary physiological threat in the first 24 hours of a major burn is **hypovolemic shock** (Burn Shock). Thermal injury causes a massive systemic inflammatory response, leading to increased capillary permeability and "third-spacing" of fluids. This results in a rapid depletion of intravascular volume. Therefore, the most critical intervention to maintain organ perfusion (especially renal function) and prevent multi-organ dysfunction syndrome (MODS) is aggressive fluid resuscitation, typically guided by the **Parkland Formula**. **Why other options are incorrect:** * **B. Dressing:** While essential for pain control and preventing secondary infection, it is a secondary priority compared to hemodynamic stabilization. * **C. Escharotomy:** This is a life- or limb-saving procedure performed only in cases of circumferential full-thickness burns causing compartment syndrome or respiratory compromise. It is not the "most important" general management step for all burn patients. * **D. Antibiotics:** Prophylactic systemic antibiotics are **not recommended** in the early management of burns as they do not prevent wound sepsis and may promote the growth of resistant organisms. **High-Yield Clinical Pearls for NEET-PG:** * **Parkland Formula:** $4 \text{ ml} \times \text{Body Weight (kg)} \times \text{TBSA\%}$. Give half in the first 8 hours and the remaining half over the next 16 hours. * **Fluid of Choice:** Ringer’s Lactate (Isotonic crystalloid). * **Best Indicator of Resuscitation:** Urine output ($0.5\text{--}1.0 \text{ ml/kg/hr}$ in adults; $1.0 \text{ ml/kg/hr}$ in children). * **Rule of Nines:** Used for rapid estimation of TBSA (Total Body Surface Area) in adults.

Question 215: Splenectomy is generally not indicated in which of the following conditions?

A. Myelofibrosis
B. Sickle cell anemia
C. Hereditary spherocytosis
D. None of the above (Correct Answer)

Explanation: ### Explanation The correct answer is **None of the above** because splenectomy is a recognized therapeutic intervention for all three conditions listed, depending on the clinical severity and specific indications. **1. Myelofibrosis (Option A):** In primary myelofibrosis, the spleen becomes a site of massive extramedullary hematopoiesis. Splenectomy is indicated for **palliative reasons**, specifically to manage symptomatic splenomegaly (causing early satiety or pain), refractory anemia requiring frequent transfusions, or severe portal hypertension. **2. Sickle Cell Anemia (Option B):** While many patients undergo "autosplenectomy" due to repeated infarctions, surgical splenectomy is indicated in cases of **acute splenic sequestration crises** (a life-threatening emergency) or for managing a **splenic abscess**. It may also be considered in chronic hypersplenism that worsens anemia. **3. Hereditary Spherocytosis (Option C):** Splenectomy is the **definitive treatment** for moderate to severe hereditary spherocytosis. Since the spleen is the primary site of destruction for the spherical RBCs, its removal significantly increases red cell survival, cures the anemia, and prevents the formation of pigment gallstones. --- ### NEET-PG Clinical Pearls: * **Timing:** In children (especially in Hereditary Spherocytosis), splenectomy should ideally be delayed until **after age 5 or 6** to reduce the risk of Overwhelming Post-Splenectomy Infection (OPSI). * **Vaccination:** Patients must receive vaccinations against encapsulated organisms (**Streptococcus pneumoniae, Haemophilus influenzae type b, and Neisseria meningitidis**) at least **2 weeks before** elective surgery or 2 weeks after emergency surgery. * **Peripheral Smear:** Post-splenectomy, look for **Howell-Jolly bodies**, Pappenheimer bodies, and Heinz bodies on the blood film. * **Most Common Indication:** The most common indication for *emergency* splenectomy is **trauma**, while the most common *elective* indication is **Immune Thrombocytopenic Purpura (ITP)**.

Question 216: A surgeon performing laparoscopic hernia surgery visualized the Triangle of doom. Which of the following is not a boundary of this anatomical region?

A. Vas deferens
B. Gonadal Vessels
C. Reflected peritoneum
D. Inguinal ligament (Correct Answer)

Explanation: The **Triangle of Doom** is a critical anatomical landmark visualized during laparoscopic inguinal hernia repair (TEP/TAPP). It is an inverted V-shaped area located inferior to the internal inguinal ring. ### Why the Inguinal Ligament is the Correct Answer The **Inguinal Ligament** does not form a boundary of the Triangle of Doom. Instead, it serves as the **superior boundary** of the **Triangle of Pain**. In laparoscopic surgery, the Triangle of Doom is defined by structures located *medial* and *lateral* to the apex (internal ring), extending inferiorly. ### Explanation of Boundaries (Incorrect Options) The Triangle of Doom is bounded by: * **Medially:** **Vas deferens** (in males) or the Round ligament (in females). * **Laterally:** **Gonadal vessels** (Testicular artery and vein). * **Inferiorly (Base):** **Reflected peritoneum** (the peritoneal fold). The clinical significance of this triangle lies in its contents: the **External Iliac Artery and Vein**. Accidental stapling or suturing in this zone can lead to life-threatening hemorrhage. ### High-Yield Clinical Pearls for NEET-PG * **Triangle of Pain:** Bounded medially by the gonadal vessels, laterally by the iliopubic tract, and superiorly by the inguinal ligament. It contains the **Lateral femoral cutaneous nerve**, the femoral branch of the genitofit femoral nerve, and the femoral nerve. * **Trapezoid of Disaster:** The combined area of the Triangle of Doom and Triangle of Pain. * **Rule of Thumb:** Never place tacks or staples **medial to the gonadal vessels** (risk of vascular injury) or **lateral to the gonadal vessels below the iliopubic tract** (risk of nerve injury).

Question 217: All of the following statements about necrotizing fasciitis are true, except?

A. Infection of fascia and subcutaneous tissue
B. Most commonly caused by Group A beta hemolytic streptococci
C. Most common site is perineum followed by trunk and extremities (Correct Answer)
D. Surgical debridement is mandatory

Explanation: **Explanation:** Necrotizing Fasciitis (NF) is a life-threatening, rapidly progressive soft tissue infection characterized by widespread necrosis of the fascia and subcutaneous fat. **1. Why Option C is the correct answer (The False Statement):** While NF can occur anywhere, the **most common sites are the extremities** (lower limbs more than upper limbs), followed by the perineum (Fournier’s gangrene) and the trunk. The statement in Option C incorrectly prioritizes the perineum as the most common site, making it the "except" choice. **2. Analysis of other options:** * **Option A:** This is a **true** definition. The infection primarily involves the superficial fascia and subcutaneous tissue, often sparing the underlying muscle (until late stages). * **Option B:** This is **true**. While Type I NF is polymicrobial (aerobes + anaerobes), **Type II NF** is monomicrobial, and **Group A beta-hemolytic Streptococcus (Streptococcus pyogenes)** is the most common causative organism in this category. * **Option D:** This is **true**. Surgical debridement is the **gold standard and mandatory** treatment. Medical management alone (antibiotics) is insufficient because the thrombosis of nutrient vessels prevents drug delivery to the necrotic tissue. **Clinical Pearls for NEET-PG:** * **Clinical Sign:** "Pain out of proportion to physical findings" is the earliest hallmark. * **Pathognomonic Sign:** Presence of **subcutaneous crepitus** or "dishwater pus" during surgery. * **LRINEC Score:** Used to differentiate NF from other soft tissue infections (based on CRP, WBC, Hemoglobin, Sodium, Creatinine, and Glucose). * **Fournier’s Gangrene:** A specific type of NF involving the perineum, scrotum, or penis, often seen in diabetics. * **Imaging:** X-ray may show gas in soft tissues; however, surgery should never be delayed for imaging if clinical suspicion is high.

Question 218: A hernia associated with a hydrocele is known by what specific name?

A. Gibbon's hernia (Correct Answer)
B. Fruber's hernia
C. Dobson's hernia
D. Leobel's hernia

Explanation: ### Explanation **Correct Option: A. Gibbon's Hernia** Gibbon's hernia is the specific eponym used to describe an **indirect inguinal hernia** that coexists with a **large hydrocele**. In this condition, the hernia sac is typically adherent to the tunica vaginalis or the hydrocele sac itself. This occurs because both conditions share a common embryological origin related to the patency or partial closure of the *processus vaginalis*. Clinically, this can make surgical dissection more challenging as the planes between the hernia sac and the hydrocele are often obliterated. **Analysis of Incorrect Options:** * **B. Fruber's hernia:** This is a distractor. There is no widely recognized surgical eponym by this name in standard textbooks like Bailey & Love or Sabiston. * **C. Dobson's hernia:** This is also a distractor. While "Dobson" is a name associated with various medical instruments, it is not an eponym for a specific type of hernia. * **D. Leobel's hernia:** This is a distractor. It is likely a phonetic confusion with **Littre’s hernia** (which contains a Meckel’s diverticulum). **NEET-PG High-Yield Pearls:** * **Littre’s Hernia:** Hernia sac containing a Meckel’s diverticulum. * **Amyand’s Hernia:** Hernia sac containing the Appendix. * **Maydl’s Hernia:** "Retrograde strangulation" where two loops of bowel are in the sac, but the intervening loop inside the abdomen is the one that becomes gangrenous (W-shaped). * **Richter’s Hernia:** Only a portion of the bowel circumference is trapped; it can strangulate without causing complete intestinal obstruction. * **Pantaloon Hernia:** Coexistence of both direct and indirect inguinal hernia sacs on the same side, straddling the inferior epigastric vessels.

Question 219: Plasma expanders are used in which type of shock?

A. Septic Shock (Correct Answer)
B. Vasovagal shock
C. Neurogenic shock
D. Cardiogenic shock

Explanation: **Explanation:** The primary indication for plasma expanders (crystalloids and colloids) is **hypovolemic shock** or any shock state characterized by **relative hypovolemia** due to peripheral vasodilation. **1. Why Septic Shock is correct:** Septic shock is a type of **distributive shock**. Inflammatory mediators cause massive systemic vasodilation and increased capillary permeability ("leaky capillaries"). This leads to a relative deficit in intravascular volume. Aggressive fluid resuscitation with plasma expanders is the first-line treatment to restore stroke volume, increase cardiac output, and maintain tissue perfusion before considering vasopressors. **2. Why the other options are incorrect:** * **Vasovagal Shock:** This is a transient, self-limiting episode caused by a reflex (bradycardia and vasodilation). It usually resolves by placing the patient in the Trendelenburg position; plasma expanders are rarely required. * **Neurogenic Shock:** While this is also a distributive shock (loss of sympathetic tone), the primary issue is the loss of peripheral resistance and bradycardia. While some fluid is given, the definitive management focuses on vasopressors (like norepinephrine) to restore vascular tone. * **Cardiogenic Shock:** The primary problem is pump failure. Administering plasma expanders can lead to fluid overload and **pulmonary edema**, worsening the patient's condition. Treatment focuses on inotropes and addressing the underlying cardiac cause. **Clinical Pearls for NEET-PG:** * **First-line fluid:** Isotonic crystalloids (Normal Saline or Ringer’s Lactate) are preferred over colloids in initial resuscitation. * **Surviving Sepsis Guidelines:** Recommend at least **30 mL/kg** of intravenous crystalloid within the first 3 hours. * **Dextran Warning:** Dextran (a colloid) can interfere with blood grouping/cross-matching and may cause nephrotoxicity.

Question 220: What is the treatment for submandibular salivary duct calcification?

A. Longitudinal incision and suturing the duct
B. Longitudinal incision and suturing the wound, leaving the duct open (Correct Answer)
C. Transverse incision and suturing the duct
D. Transverse incision and suturing the wound, leaving the duct open

Explanation: The management of submandibular salivary duct stones (sialolithiasis) depends on the stone's location. For stones located in the distal part of the **Wharton’s duct**, the standard surgical procedure is a **transoral sialolithotomy**. ### **Why Option B is Correct** 1. **Longitudinal Incision:** The incision must be made **longitudinally** over the stone along the axis of the duct. This minimizes the risk of circumferential scarring, which could lead to ductal stenosis. 2. **Leaving the Duct Open:** After the stone is removed, the ductal incision is **not sutured**. Instead, the edges of the ductal mucosa are often marsupialized (sutured to the oral mucosa) or simply left open. This ensures a wide outlet for saliva, prevents stricture formation, and allows any residual debris or sludge to drain freely. The overlying oral mucosa wound is then closed around the new opening. ### **Why Other Options are Incorrect** * **Options A & C:** Suturing the duct itself is contraindicated. It significantly increases the risk of **ductal stricture** and subsequent obstructive sialadenitis. * **Options C & D:** A **transverse incision** is avoided because it can transect the duct or lead to significant narrowing (stenosis) upon healing, obstructing future salivary flow. ### **NEET-PG High-Yield Clinical Pearls** * **Most Common Site:** 80% of all salivary stones occur in the **submandibular gland** because its secretions are more alkaline, have higher calcium/phosphate content, and the duct (Wharton’s) has an upward, tortuous course. * **Radiology:** 80% of submandibular stones are **radio-opaque** (visible on X-ray, specifically the intraoral periapical or occlusal view). * **Clinical Presentation:** Classic "meal-time syndrome"—pain and swelling of the gland triggered by the sight or smell of food. * **Proximal Stones:** If the stone is located within the gland parenchyma or the proximal duct (hilar), **excision of the entire submandibular gland** is usually required.

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Wound Healing and Care

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Surgical Infections

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Fluid and Electrolyte Management

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Nutrition in Surgical Patients

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Hemostasis and Blood Transfusion

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Surgical Instruments and Equipment

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Sutures and Stapling Devices

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Minimal Access Surgery Principles

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Surgical Complications

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Anesthesia Principles for Surgeons

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Surgical Oncology Principles

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Evidence-Based Surgery

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