General Surgery Principles — MCQs

General Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 291: Which of the following staplers is used for Minimally Invasive Parathyroidectomy (MIPH)?

A. Linear cutting stapler
B. Circular stapler (Correct Answer)
C. Linear stapler
D. Circular cutting stapler

Explanation: **Explanation:** The correct answer is **B. Circular stapler**. **Minimally Invasive Procedure for Hemorrhoids (MIPH)**, also known as **Stapled Hemorrhoidopexy** (Longo’s procedure), is a technique used primarily for 2nd, 3rd, and some 4th-degree internal hemorrhoids. The procedure does not involve the excision of the hemorrhoidal tissue itself; instead, it involves a circumferential excision of the redundant rectal mucosa and submucosa above the dentate line. A **Circular Stapler** is used because it allows for this circumferential resection while simultaneously performing an end-to-end anastomosis. This "lifts" the prolapsed hemorrhoidal cushions back to their anatomical position and interrupts the superior hemorrhoidal arterial blood supply, leading to the shrinkage of the hemorrhoids. **Analysis of Incorrect Options:** * **A & C (Linear & Linear Cutting Staplers):** These are used for creating side-to-side or end-to-side anastomoses and for transecting organs (e.g., bowel resection or lung biopsy). They cannot perform the circumferential "purse-string" closure required in MIPH. * **D (Circular Cutting Stapler):** While circular staplers do have a cutting blade, the standard terminology used in surgical practice and exams for the device used in Longo’s procedure is simply the "Circular Stapler" (specifically the PPH - Procedure for Prolapse and Hemorrhoids kit). **High-Yield Clinical Pearls for NEET-PG:** * **Indication:** MIPH is the gold standard for **Grade III circumferential prolapsed hemorrhoids**. * **Key Advantage:** Significant reduction in **post-operative pain** compared to open hemorrhoidectomy (Milligan-Morgan) because the procedure is performed above the dentate line (insensitive zone). * **Complication:** Though rare, **rectovaginal fistula** or persistent urgency can occur if the staple line is too low or deep.

Question 292: Sistrunks procedure is used for which of the following conditions?

A. Thyroglossal cyst (Correct Answer)
B. Reidel thyroiditis
C. Thymic aplasia
D. All of the above

Explanation: **Explanation:** **Sistrunk’s procedure** is the definitive surgical treatment for a **Thyroglossal cyst**. The procedure is based on the embryological development of the thyroid gland, which descends from the foramen caecum at the base of the tongue to the neck via the thyroglossal duct. Because the duct is intimately associated with the **hyoid bone**, simple excision of the cyst leads to a high recurrence rate (approx. 50%). The Sistrunk’s operation involves: 1. Excision of the cyst. 2. Removal of the entire tract up to the foramen caecum. 3. **Resection of the central part of the hyoid bone** (the most critical step to prevent recurrence). **Analysis of Incorrect Options:** * **B. Reidel Thyroiditis:** This is a rare chronic inflammatory disease where thyroid tissue is replaced by dense fibrous tissue. Management is usually medical (Tamoxifen/Steroids) or involves a wedge resection of the isthmus to relieve tracheal compression. * **C. Thymic Aplasia:** Associated with DiGeorge syndrome (22q11 deletion), this is a congenital immunodeficiency. It is managed with thymus transplantation or bone marrow transplant, not Sistrunk’s procedure. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Thyroglossal cysts are most commonly **subhyoid** (65%) and are always located in the midline (except at the level of the thyroid cartilage where they may be slightly paramedian). * **Clinical Sign:** It is the only midline swelling that **moves upwards on protrusion of the tongue** (due to its attachment to the foramen caecum). * **Malignancy:** The most common malignancy arising in a thyroglossal cyst is **Papillary Carcinoma of the Thyroid** (1%). * **Recurrence:** With Sistrunk’s procedure, the recurrence rate drops to <5%.

Question 293: Which of the following is NOT an absolute indication for splenectomy?

A. Splenic abscess
B. Hereditary spherocytosis
C. Fibrosarcoma
D. Autoimmune hemolytic anemia (Correct Answer)

Explanation: **Explanation:** The decision for splenectomy is categorized into absolute and relative indications. **Autoimmune Hemolytic Anemia (AIHA)** is a **relative indication** because the primary treatment is medical (corticosteroids, immunosuppressants, or Rituximab). Splenectomy is reserved only for refractory cases where medical therapy fails or is contraindicated. **Why the other options are Absolute Indications:** * **Splenic Abscess:** This is an absolute indication because abscesses in the spleen rarely respond to antibiotics alone and carry a high risk of rupture and life-threatening peritonitis. * **Hereditary Spherocytosis:** This is the **most common** indication for elective splenectomy. Since the spleen is the primary site of destruction for the abnormal spherical RBCs, splenectomy is curative for the anemia (though it doesn't fix the genetic defect). * **Fibrosarcoma (Primary Splenic Malignancy):** Any primary malignant tumor of the spleen requires total splenectomy for oncological clearance and to prevent metastasis. **NEET-PG High-Yield Pearls:** 1. **Most common indication for Splenectomy:** Trauma (specifically blunt trauma to the abdomen). 2. **Most common elective indication:** Hereditary Spherocytosis. 3. **Vaccination Protocol:** To prevent OPSI (Overwhelming Post-Splenectomy Infection), patients must be vaccinated against *Streptococcus pneumoniae*, *Haemophilus influenzae type B*, and *Neisseria meningitidis* at least **2 weeks before** elective surgery or **2 weeks after** emergency surgery. 4. **Post-Splenectomy Blood Picture:** Look for **Howell-Jolly bodies** (most characteristic), Pappenheimer bodies, Heinz bodies, and target cells.

Question 294: Which statement is NOT true regarding bone removal during impacted third molar extraction?

A. A low speed, low torque drill is used for bone removal. (Correct Answer)
B. Bone is removed from the buccal, occlusal, and sometimes distal aspects of the impacted tooth.
C. Bone removal from the lingual aspect of the tooth is not advisable.
D. Bone removal is accompanied by continuous, copious irrigation to remove bone debris from the bur and keep the temperature under control.

Explanation: ### Explanation The surgical removal of an impacted third molar requires precise bone guttering to create a path of exit for the tooth. **1. Why Option A is the Correct Answer (The False Statement):** In modern oral surgery, bone removal is performed using a **high-speed, high-torque** handpiece (often air-driven or electric). High torque is essential to maintain cutting efficiency against dense cortical bone without stalling. Conversely, low-speed or low-torque drills are inefficient, cause more mechanical trauma, and increase surgical time, which leads to greater postoperative edema and pain. **2. Analysis of Other Options:** * **Option B:** Bone is traditionally removed from the **buccal and occlusal** surfaces to expose the crown. **Distal** bone removal is often necessary for distoangular impactions. This creates a "gutter" that allows for the application of elevators. * **Option C:** Bone removal from the **lingual aspect** is strictly avoided to prevent injury to the **lingual nerve**, which lies in close proximity to the lingual plate in the third molar region. * **Option D:** Continuous, copious irrigation with sterile saline or Ringer’s lactate is mandatory. It prevents **thermal osteonecrosis** (which occurs if bone temperature exceeds 47°C) and clears debris to maintain visibility. **3. High-Yield Clinical Pearls for NEET-PG:** * **Thermal Threshold:** Bone death occurs if heated above **47°C for 1 minute**. * **Bur Type:** Round burs (size 8) or fissure burs (702/703) are typically used for guttering. * **Lingual Nerve Protection:** The "Lingual Split Technique" (Ward’s) is an older method, but modern practice emphasizes protecting the lingual plate to avoid permanent paresthesia of the tongue. * **Handpiece Safety:** Surgical handpieces must not exhaust air into the wound to prevent **tissue emphysema**.

Question 295: When using colloid infusion for the treatment of shock, what is the ratio at which blood loss is compensated?

A. 1:2
B. 1:1 (Correct Answer)
C. 1:3
D. 1:5

Explanation: ### Explanation The correct answer is **1:1 (Option B)**. **Why it is correct:** The goal of fluid resuscitation in shock is to restore intravascular volume. Colloids (such as Albumin, Dextran, or Hydroxyethyl starch) consist of large molecules that do not easily cross the semi-permeable capillary membrane. Because these molecules remain within the intravascular compartment, they exert a high oncotic pressure, effectively "holding" the fluid in the bloodstream. Therefore, to replace a specific volume of blood loss, an equal volume of colloid is required (a **1:1 ratio**). **Why the other options are incorrect:** * **1:3 (Option C):** This is the traditional ratio used for **Crystalloids** (like Normal Saline or Ringer’s Lactate). Crystalloids freely distribute between the intravascular and interstitial spaces. Only about 25-30% of infused crystalloid remains in the vessels after 20 minutes; thus, 3 mL of crystalloid is needed to replace 1 mL of blood loss. * **1:2 and 1:5 (Options A & D):** These ratios do not correspond to standard resuscitation protocols for acute blood loss. While some modern guidelines suggest a 1.5:1 or 2:1 ratio for crystalloids to avoid fluid overload, 1:1 remains the definitive physiological rule for colloids. **High-Yield Clinical Pearls for NEET-PG:** * **Crystalloid vs. Colloid:** Crystalloids are the first-line fluid for hemorrhagic shock (ATLS guidelines). Colloids are more expensive and carry risks of coagulopathy and anaphylaxis. * **The "3-for-1" Rule:** Always associate the 3:1 ratio with crystalloids and the 1:1 ratio with colloids or blood products. * **Albumin:** The most commonly used natural colloid; 5% albumin is iso-oncotic, while 25% albumin is hyper-oncotic (draws fluid from the interstitium). * **Dextran Warning:** Can interfere with blood cross-matching and may decrease platelet aggregation.

Question 296: What is the first step in performing a pneumonectomy for cancer of the bronchus?

A. Ligate the pulmonary vein
B. Ligate the pulmonary artery (Correct Answer)
C. Divide the bronchus
D. Perform lymph node clearance

Explanation: In surgery for bronchogenic carcinoma, the sequence of vessel ligation is critical to prevent the hematogenous spread of tumor cells. **Why the Pulmonary Artery is ligated first:** The standard surgical principle in oncological pneumonectomy is to **ligate the pulmonary artery first**. By cutting off the inflow (arterial supply) while keeping the outflow (venous drainage) intact for a few moments, the surgeon prevents the "congestion" of the lung. More importantly, it minimizes the risk of squeezing tumor emboli into the systemic circulation, which could occur if the veins were ligated while the artery continued to pump blood into the tumor-bearing lung. **Analysis of Incorrect Options:** * **Ligate the pulmonary vein:** If the vein is ligated first, the arterial pressure continues to engorge the lung, potentially forcing malignant cells into the capillary bed or dislodging them into the left atrium once the vein is manipulated. * **Divide the bronchus:** This is typically the final major step of the resection. Early division would obscure the hilar anatomy and increase the risk of contamination. * **Perform lymph node clearance:** While essential for staging and prognosis, formal lymphadenectomy (mediastinal nodal dissection) is performed during or after the mobilization and resection of the lung, not as the very first step. **High-Yield Clinical Pearls for NEET-PG:** * **Exception to the Rule:** In cases of **highly vascular tumors** or when there is significant manipulation required, some surgeons advocate for early venous ligation to prevent "shedding," but for the purpose of standard surgical exams, **Artery First** remains the classic teaching. * **Order of structures in the Hilum (Anterior to Posterior):** Vein, Artery, Bronchus (**VAB**). * **Order of structures in the Hilum (Superior to Inferior):** * Right side: Bronchus, Artery, Vein (**BAV**) * Left side: Artery, Bronchus, Vein (**ABV**)

Question 297: What is the size of the blade commonly used for incision and drainage?

A. 11 (Correct Answer)
B. 13
C. 15
D. 22

Explanation: **Explanation:** The correct answer is **Option A: 11**. In surgical practice, the choice of scalpel blade is determined by the specific requirement of the procedure. For **Incision and Drainage (I&D)** of an abscess, the **No. 11 blade** is the gold standard. It is characterized by its elongated, triangular shape with a sharp point and a straight cutting edge. This design allows for a precise "stab incision," where the sharp tip can easily penetrate the tense wall of an abscess or perform a fine arteriotomy without requiring significant pressure or a long dragging motion. **Analysis of Incorrect Options:** * **Option B (13):** This is not a standard blade size used in general surgical practice. * **Option C (15):** This is a small, curved blade used for making short, precise incisions in delicate tissues (e.g., hand surgery, plastic surgery, or biopsies). While common, it lacks the pointed geometry required for an efficient stab incision in I&D. * **Option D (22):** This is a large, curved blade used for making long skin incisions in major abdominal or thoracic surgeries. It is used with a No. 4 handle, whereas blades 10, 11, 12, and 15 fit a No. 3 handle. **Clinical Pearls for NEET-PG:** * **No. 10 Blade:** The most common blade for large skin incisions (curved edge). * **No. 12 Blade:** Hook-shaped; primarily used for suture removal or procedures in the oropharynx (e.g., tonsillectomy). * **Handle Compatibility:** Blades 10–15 fit the **No. 3 handle**; blades 20–25 fit the **No. 4 handle**. * **Safety:** Always use a needle holder or forceps to load/unload blades to prevent sharps injuries.

Question 298: For alveolar distraction, what is the adequate height of the mandible needed?

A. 4-6 mm
B. 6-8 mm
C. 8-10 mm (Correct Answer)
D. 10-12 mm

Explanation: **Explanation:** **Alveolar Distraction Osteogenesis (ADO)** is a surgical technique used to increase the height of an atrophic alveolar ridge. It involves creating a transport segment (osteotomy) and gradually separating it from the basal bone to induce new bone formation in the gap. **1. Why 8-10 mm is correct:** To perform a successful distraction, there must be sufficient residual bone height to accommodate the surgical procedure and the distraction device. Specifically: * **The Transport Segment:** Requires approximately **3-5 mm** of bone height to maintain vascularity and structural integrity. * **The Basal Bone:** Requires approximately **4-5 mm** of bone to provide a stable foundation for the distraction screws/device. Adding these requirements together, a minimum total height of **8-10 mm** is clinically necessary to avoid complications like segment necrosis or mandibular fracture. **2. Why other options are incorrect:** * **4-6 mm & 6-8 mm:** These heights are insufficient. Attempting distraction with less than 8 mm of bone often leads to the fracture of the transport segment or the basal bone because the bone is too thin to support the hardware. * **10-12 mm:** While distraction is easier with more bone, 8-10 mm is established as the standard *minimum adequate height* required to initiate the procedure safely. **Clinical Pearls for NEET-PG:** * **Rate of Distraction:** Typically **1 mm per day** (usually divided into 0.5 mm twice daily). * **Latency Period:** The time between surgery and starting distraction, usually **5–7 days**. * **Consolidation Period:** The time allowed for the new bone to mineralize before removing the device, typically **8–12 weeks**. * **Primary Indication:** Vertical ridge deficiency prior to dental implant placement.

Question 299: What is the most common type of hernia?

A. Inguinal (Correct Answer)
B. Femoral
C. Umbilical
D. Epigastric

Explanation: **Explanation:** **1. Why Inguinal Hernia is Correct:** Inguinal hernias are the most common type of abdominal wall hernia, accounting for approximately **75% of all hernias**. They occur due to a weakness in the transversalis fascia or a patent processus vaginalis. Among inguinal hernias, the **Indirect Inguinal Hernia** is the most common subtype in both males and females, as well as across all age groups. This is a high-yield fact for NEET-PG: while direct hernias are common in the elderly, indirect remains the overall leader. **2. Why Other Options are Incorrect:** * **Femoral Hernia:** These occur through the femoral canal. While they are more common in females than in males (due to a wider pelvis), they are still significantly less common than inguinal hernias overall. They carry the highest risk of strangulation. * **Umbilical Hernia:** These occur at the umbilicus due to a defect in the umbilical scar. While common in infants (congenital) and obese adults (acquired), their overall incidence does not surpass inguinal hernias. * **Epigastric Hernia:** These occur through the linea alba between the xiphoid process and the umbilicus. They represent only about 1–5% of all abdominal hernias. **3. Clinical Pearls for NEET-PG:** * **Most common hernia overall:** Indirect Inguinal Hernia. * **Most common hernia in females:** Indirect Inguinal Hernia (Note: Femoral hernia is *more common in females than males*, but indirect inguinal is still the *most common in females*). * **Mcevedy, Lotheissen, and Hey Groves** are surgical approaches specifically for Femoral hernias. * **Gold Standard for Inguinal Hernia Repair:** Lichtenstein Tension-Free Mesh Repair.

Question 300: What is the primary treatment for a perforated peptic ulcer?

A. Vagotomy and Pyloroplasty
B. Vagotomy and Antrectomy
C. Vagotomy and repair of perforation (Correct Answer)
D. Graham's repair

Explanation: **Explanation:** The primary goal in managing a perforated peptic ulcer is twofold: addressing the acute surgical emergency (peritonitis) and treating the underlying acid-peptic disease. **Why Option C is Correct:** In the context of traditional surgical teaching for NEET-PG, **Vagotomy and repair of perforation** is considered the definitive treatment. While the perforation is closed (usually with an omental patch), the **Vagotomy** (typically Truncated or Selective) addresses the etiology by reducing gastric acid secretion, thereby preventing recurrence. This combined approach manages both the complication and the disease. **Analysis of Incorrect Options:** * **Option A & B (Vagotomy with Pyloroplasty/Antrectomy):** These are definitive acid-reduction surgeries but are generally too extensive and time-consuming in the setting of acute bacterial peritonitis. Performing a resection (Antrectomy) or altering gastric emptying (Pyloroplasty) in an unstable, septic patient increases morbidity significantly. * **Option D (Graham’s Repair):** This refers to the placement of a pedicled omental patch over the perforation. While it is the **most common emergency procedure** performed today (especially in the era of PPIs), it is technically a "repair" only. Without a vagotomy or long-term medical management, it does not address the underlying hyperacidity. **NEET-PG High-Yield Pearls:** * **Investigation of Choice:** X-ray Erect Abdomen (shows free gas under the diaphragm in 75% of cases). * **Gold Standard Investigation:** NCCT Abdomen (most sensitive). * **Modified Graham’s Patch:** The current standard where the omentum is placed *over* the primary sutures rather than plugged into the hole. * **Conservative Management:** Known as **Taylor’s Method** (aspirations, antibiotics, and fluids), reserved only for stable patients with "sealed" perforations.

Practice by Chapter

Wound Healing and Care

Practice Questions

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

Practice Questions

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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