General Surgery Principles — MCQs

General Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 141: Pulp space infection is known as:

A. Felon (Correct Answer)
B. Paronychia
C. Perionychia
D. Onychonychia

Explanation: ### Explanation **1. Correct Answer: Felon** A **Felon** is an acute abscess involving the **pulp space** of the distal phalanx. The pulp space is a closed compartment divided into multiple small pockets by tough fibrous septa (fascial bands) that extend from the skin to the periosteum. * **Mechanism:** Infection (usually *Staphylococcus aureus*) leads to increased pressure within these non-compliant compartments. * **Clinical Significance:** If untreated, the rising pressure can compress the digital vessels, leading to **ischemic necrosis** of the pulp and potentially causing **osteomyelitis** of the distal phalanx. **2. Analysis of Incorrect Options:** * **B. Paronychia:** This is an infection of the **lateral nail fold** (the soft tissue surrounding the nail). It is the most common hand infection. * **C. Perionychia:** This refers to inflammation or infection of the **perionychium**, which is the entire structure surrounding the nail (including the nail bed and folds). It is often used interchangeably with paronychia but specifically denotes the broader area. * **D. Onychonychia:** This is a redundant or non-standard clinical term. Related terms like *Onychia* refer to inflammation of the nail matrix itself. **3. NEET-PG High-Yield Pearls:** * **Most common organism:** *Staphylococcus aureus*. * **Treatment of Felon:** Early **Incision and Drainage (I&D)**. The incision is typically made along the lateral aspect of the distal phalanx to avoid the tactile pad and prevent scarring. * **Kanavel’s Signs:** Remember these for **Flexor Tenosynovitis** (another high-yield hand infection): 1. Finger held in flexion, 2. Uniform swelling (fusiform), 3. Tenderness along the tendon sheath, 4. Pain on passive extension. * **Eponychium:** The specialized skin at the base of the nail (cuticle). Infection here is called **Eponychia**.

Question 142: What is a felon?

A. Pulp space infection (Correct Answer)
B. Herpetic lesion of the hand
C. Fungal infection of the hand
D. Marjolin’s ulcer involving the hand

Explanation: **Explanation:** A **felon** is an acute, closed-space infection of the **pulp space** of the fingertip. The pulp is divided into multiple small, non-compliant compartments by tough fibrous septa that extend from the periosteum of the distal phalanx to the skin. **Why Option A is correct:** When an infection (usually *Staphylococcus aureus*) occurs in this space, the inflammatory edema leads to a rapid increase in pressure because the fibrous septa prevent the tissue from expanding. This high pressure can occlude the small vessels supplying the distal phalanx, leading to intense throbbing pain and, if untreated, **osteomyelitis** or tissue necrosis. **Why the other options are incorrect:** * **Option B:** A herpetic lesion of the hand is known as a **Herpetic Whitlow**. It is caused by HSV-1 or HSV-2 and is characterized by vesicles. Unlike a felon, it should *not* be incised as it can lead to secondary bacterial infection or systemic spread. * **Option C:** Fungal infections of the hand (like Tinea manuum) or nails (Onychomycosis) present with scaling or nail thickening, not acute abscess formation. * **Option D:** **Marjolin’s ulcer** is a squamous cell carcinoma arising in a chronic wound or burn scar; it is a malignancy, not an acute infection. **Clinical Pearls for NEET-PG:** * **Management:** The definitive treatment is **Incision and Drainage (I&D)**. The incision is typically made where the pain is maximal (lateral or volar) to decompress the compartments. * **Complication:** The most common complication of an untreated felon is **Osteomyelitis** of the distal phalanx. * **Differential:** Distinguish from **Paronychia**, which is an infection of the soft tissue surrounding the nail fold.

Question 143: Who is known as the Father of Modern Surgery?

A. Sushruta
B. Claude Bernard
C. Ambroise Pare (Correct Answer)
D. Andreas Gruntzig

Explanation: **Explanation:** **Ambroise Paré (Option C)** is widely regarded as the **Father of Modern Surgery**. A French royal surgeon, he revolutionized surgical practice during the 16th century by challenging long-standing dogmas. His most significant contributions include the abandonment of the practice of cauterizing wounds with boiling oil (replacing it with a soothing digestive of egg yolk, oil of roses, and turpentine) and the reintroduction of **ligatures** to control hemorrhage during amputations instead of using a hot iron. These innovations significantly reduced mortality and pain, laying the foundation for humane, evidence-based surgical techniques. **Analysis of Incorrect Options:** * **Sushruta (Option A):** Known as the **Father of Surgery** (and Father of Plastic Surgery). His ancient Indian treatise, the *Sushruta Samhita*, described complex procedures like rhinoplasty and lithotomy centuries before the modern era. * **Claude Bernard (Option B):** Known as the **Father of Modern Physiology**. He formulated the concept of *milieu intérieur* (homeostasis). * **Andreas Gruntzig (Option D):** Known as the **Father of Interventional Cardiology** for performing the first successful coronary angioplasty. **NEET-PG High-Yield Pearls:** * **Father of Antiseptic Surgery:** Joseph Lister (introduced carbolic acid). * **Father of American Surgery:** William Stewart Halsted (introduced rubber gloves, radical mastectomy, and residency training). * **Father of Vascular Surgery:** Alexis Carrel. * **John Hunter:** Known as the **Father of Scientific Surgery** for his work in surgical anatomy and pathology.

Question 144: In a 60 kg man with 40% burns, what is the amount of Ringer's lactate given in the first 8 hours?

A. 9600 ml
B. 6400 ml
C. 4800 ml (Correct Answer)
D. 3200 ml

Explanation: ### Explanation The correct answer is **4800 ml**. This calculation is based on the **Parkland Formula**, which is the gold standard for fluid resuscitation in burn patients during the first 24 hours. #### 1. Why the Correct Answer is Right According to the Parkland Formula, the total fluid requirement (Ringer’s Lactate) for the first 24 hours is calculated as: **4 ml × Body Weight (kg) × Total Body Surface Area (TBSA) % of burns.** * **Total Fluid (24 hrs):** 4 ml × 60 kg × 40 = **9600 ml** * **Timing Protocol:** Half of this total volume must be administered in the **first 8 hours** (from the time of injury), and the remaining half over the next 16 hours. * **Calculation for first 8 hours:** 9600 ml / 2 = **4800 ml**. #### 2. Why Other Options are Incorrect * **Option A (9600 ml):** This represents the total fluid requirement for the entire **24-hour** period, not just the first 8 hours. * **Option B (6400 ml):** This would be the 8-hour requirement if using a 5.3 ml/kg/TBSA ratio, which is not standard. * **Option C (3200 ml):** This would be the 8-hour requirement if using the **Modified Brooke Formula** (2 ml/kg/TBSA), which is often used to avoid fluid overload but is not the primary teaching for this specific question. #### 3. NEET-PG High-Yield Pearls * **Fluid of Choice:** Crystalloid, specifically **Ringer’s Lactate**, is preferred because its composition is closest to extracellular fluid and it helps prevent hyperchloremic metabolic acidosis. * **Monitoring:** The most reliable indicator of adequate fluid resuscitation is **Urinary Output**. Aim for **0.5–1.0 ml/kg/hr** in adults and **1.0–1.5 ml/kg/hr** in children. * **Rule of 9s:** Remember that the Parkland formula is only applied for **2nd and 3rd-degree burns**; 1st-degree burns (erythema) are excluded from the TBSA calculation. * **Updated Guidelines:** Recent ATLS guidelines suggest starting with **2 ml/kg/TBSA** for thermal burns to prevent "fluid creep," but the Parkland Formula (4 ml) remains the most frequently tested concept in exams.

Question 145: Which of the following is NOT a basic rule for wound closure?

A. Wound edges should be left slightly gaping to allow for swelling.
B. Wound edges should be inverted. (Correct Answer)
C. The knot should be placed to one side of the wound.
D. Knots must be secure, with the ends long enough to grasp when removing the suture.

Explanation: **Explanation:** The primary goal of wound closure is to achieve primary intention healing with minimal scarring. The fundamental rule for skin closure is that **wound edges should be everted (turned outward), not inverted.** 1. **Why "Wound edges should be inverted" is the correct answer (The False Statement):** Inversion of wound edges (turning the skin edges inward) leads to a "dead space" where the epidermal layers meet instead of the dermal layers. Since the epidermis does not heal to itself, this results in poor wound strength, increased risk of infection, and a depressed, unsightly scar. Proper technique involves **eversion**, which ensures maximum dermal-to-dermal contact. As the wound heals and the scar contracts, an everted edge eventually flattens out to a level surface. 2. **Analysis of other options:** * **Option A:** Leaving edges slightly gaping is sometimes necessary in traumatic or contaminated wounds to allow for inflammatory edema and drainage, preventing tension-induced ischemia. * **Option C:** Placing the knot to one side (rather than directly over the incision line) prevents the knot from being buried in the healing wound, reduces irritation, and makes suture removal easier. * **Option D:** Secure knots are essential for wound integrity. Leaving "tails" long enough ensures they can be easily identified and grasped with forceps during removal. **Clinical Pearls for NEET-PG:** * **"Eversion is Perfection":** Use the **Vertical Mattress suture** (the "Far-Far, Near-Near" technique) as the gold standard for achieving wound edge eversion. * **Langer’s Lines:** Always try to make incisions parallel to these tension lines for the best cosmetic results. * **Tension:** Sutures should be "apposed, not opposed." Excessive tension leads to tissue strangulation and necrosis.

Question 146: Splenectomy is indicated in which of the following conditions?

A. Spherocytosis
B. Pyropoikilosis
C. Elliptocytosis
D. All of the above (Correct Answer)

Explanation: **Explanation:** The correct answer is **D (All of the above)**. The underlying medical concept involves the role of the spleen in **extravascular hemolysis**. In various hereditary red cell membrane defects, the erythrocytes lose their normal deformability, becoming trapped and destroyed by splenic macrophages. 1. **Hereditary Spherocytosis (HS):** This is the most common indication for elective splenectomy in children. Due to defects in proteins like spectrin or ankyrin, RBCs become spherical. These rigid cells cannot pass through the narrow splenic cords, leading to chronic hemolysis. Splenectomy is curative for the anemia, although the spherocytes persist in the peripheral blood. 2. **Hereditary Pyropoikilosis:** A severe subtype of elliptocytosis characterized by extreme thermal sensitivity of RBCs and fragmentation. It presents with severe hemolytic anemia from infancy, often necessitating splenectomy to reduce the transfusion burden. 3. **Hereditary Elliptocytosis (HE):** While most cases are asymptomatic, a small percentage of patients (approx. 10%) suffer from significant hemolysis. In these symptomatic cases, splenectomy is highly effective in increasing RBC lifespan. **Clinical Pearls for NEET-PG:** * **Timing:** Splenectomy should ideally be delayed until **after age 5** to minimize the risk of Overwhelming Post-Splenectomy Infection (OPSI). * **Prophylaxis:** Patients must receive vaccinations against encapsulated organisms (*S. pneumoniae, H. influenzae, N. meningitidis*) at least **2 weeks prior** to elective surgery. * **Post-Op Findings:** Look for **Howell-Jolly bodies**, Pappenheimer bodies, and Heinz bodies on the peripheral smear post-splenectomy. * **Gallstones:** Pigment (bilirubin) gallstones are a common complication of these hemolytic anemias; cholecystectomy is often performed concurrently with splenectomy.

Question 147: What is true regarding the resection and anastomosis of necrotic bowel?

A. Chromic catgut is used for anastomosis.
B. The submucosa should not be included in the sutures.
C. A single-layer, extramucosal suture technique is preferred. (Correct Answer)
D. A single-layer seromuscular suture technique is preferred.

Explanation: In intestinal surgery, the primary goal of anastomosis is to create a tension-free, leak-proof seal with adequate blood supply. **Explanation of the Correct Answer:** **Option C** is correct because the **single-layer, extramucosal (seromuscular) interrupted technique** is currently the gold standard. This technique involves taking a bite through the serosa, muscularis, and the **submucosa**, but specifically excluding the mucosa. This approach preserves the blood supply to the edges, causes less tissue strangulation, and results in less luminal narrowing compared to traditional double-layer techniques. **Analysis of Incorrect Options:** * **Option A:** Chromic catgut is a natural absorbable suture that loses strength rapidly and causes significant tissue reaction. Modern practice dictates the use of synthetic sutures (like PDS or Vicryl) for better tensile strength and minimal inflammation. * **Option B:** The **submucosa** is the strongest layer of the bowel wall (containing the most collagen). Any suture that does not include the submucosa lacks structural integrity and is prone to dehiscence. * **Option D:** While "seromuscular" is part of the technique, the term "extramucosal" is more precise in surgical literature as it emphasizes the inclusion of the submucosa while avoiding the contaminated mucosal lumen. **High-Yield Clinical Pearls for NEET-PG:** * **Strongest layer of the bowel:** Submucosa (essential for suture holding). * **Most common site of leak:** Extraperitoneal rectum (due to lack of serosa). * **Suture of choice:** Monofilament delayed-absorbable (e.g., PDS) is often preferred for single-layer closure. * **Hand-sewn vs. Stapled:** Studies show no significant difference in leak rates, but stapling is faster.

Question 148: Who is considered the Father of Surgery?

A. Hippocrates
B. Ambroise Paré (Correct Answer)
C. Sushruta
D. Aristotle

Explanation: **Explanation:** The correct answer is **Ambroise Paré (Option B)**. While the title "Father of Surgery" can be context-dependent, in the standard Western medical curriculum and most surgical textbooks (like Bailey & Love), Ambroise Paré is recognized as the **Father of Modern Surgery**. A 16th-century French barber-surgeon, he revolutionized surgical practice by abandoning the painful practice of cauterizing wounds with boiling oil, instead using soothing ointments and ligating arteries during amputations to control hemorrhage. **Analysis of Incorrect Options:** * **A. Hippocrates:** Known as the **Father of Medicine**. He established medicine as a profession and is famous for the Hippocratic Oath, but his focus was more on clinical observation and ethics than surgical technique. * **C. Sushruta:** Known as the **Father of Indian Surgery** and the **Father of Plastic Surgery**. He authored the *Sushruta Samhita* and pioneered rhinoplasty and cataract surgery in ancient India. (Note: If the question specifically asks for the "Ancient Father of Surgery," Sushruta is the answer). * **D. Aristotle:** Known as the **Father of Biology** and Zoology. While he contributed to anatomy through animal dissection, he was not a surgeon. **High-Yield Clinical Pearls for NEET-PG:** * **John Hunter:** Often called the **Father of Scientific Surgery** for applying the scientific method to surgical practice. * **Joseph Lister:** The **Father of Antiseptic Surgery** (introduced carbolic acid). * **William Halsted:** The **Father of Modern American Surgery** (introduced rubber gloves and residency training). * **Theodore Kocher:** The first surgeon to win a Nobel Prize (for work on the thyroid gland).

Question 149: What is the principal problem associated with tuberosity reduction?

A. Poor access
B. Formation of oro-antral fistula (Correct Answer)
C. Infection
D. Damage to the posterior superior alveolar nerve

Explanation: **Explanation:** Maxillary tuberosity reduction is a pre-prosthetic surgical procedure performed to eliminate bony undercuts or create adequate inter-arch space for dentures. **Why Option B is Correct:** The primary anatomical concern during tuberosity reduction is the proximity of the **maxillary sinus**. In many patients, the sinus undergoes "pneumatization," where it expands inferiorly into the alveolar process and tuberosity area. Consequently, the bone separating the oral cavity from the sinus can be extremely thin. Aggressive bone removal or accidental fracture of the tuberosity during the procedure frequently leads to the **formation of an oro-antral fistula (OAF)**, which is the most significant and common complication associated with this surgery. **Analysis of Incorrect Options:** * **A. Poor access:** The maxillary tuberosity is generally well-visualized once a mucoperiosteal flap is reflected; access is rarely the "principal" surgical problem. * **C. Infection:** While a risk in any surgery, it is not specific to tuberosity reduction and is usually managed easily with antibiotics and proper technique. * **D. Damage to the PSA nerve:** While the posterior superior alveolar nerve enters the maxilla in this region, its damage typically results in transient paresthesia of the molars, which is clinically less significant than a permanent sinus communication (OAF). **NEET-PG High-Yield Pearls:** * **Pre-operative Imaging:** Always evaluate a periapical or panoramic radiograph (OPG) to determine the extent of sinus pneumatization before surgery. * **Management:** If a small sinus opening occurs (<2mm), it may heal spontaneously with a blood clot; larger openings require primary closure using a buccal flap or palatal rotation flap. * **Rule of Thumb:** Always use a "conservative" approach with rongeurs or burs rather than osteotomes to minimize the risk of tuberosity fracture.

Question 150: Which of the following is a scoring system for the severity of wound infection?

A. PRISMA guidelines
B. ASEPSIS score (Correct Answer)
C. Manchester scoring system
D. POSSUM score

Explanation: **Explanation:** The **ASEPSIS score** is a validated objective scoring system used to assess the severity of surgical site infections (SSI). It was originally developed by Wilson et al. to provide a reproducible method for monitoring wound healing. 1. **Why ASEPSIS is correct:** The acronym stands for: **A**dditional treatment, **S**erous discharge, **E**rythema, **P**urulent exudate, **S**eparation of deep tissues, **I**solation of bacteria, and **S**tay in hospital. It assigns numerical points based on clinical observations during the first 5–7 postoperative days and the requirement for interventions (like antibiotics or drainage). A score >20 indicates a minor infection, while >40 indicates a severe infection. 2. **Why the other options are incorrect:** * **PRISMA guidelines:** These are a set of evidence-based minimum items for reporting in systematic reviews and meta-analyses, not a clinical scoring tool. * **Manchester scoring system:** This is used for the clinical assessment of **scars** (e.g., hypertrophic scars or keloids), evaluating parameters like color, contour, and texture. * **POSSUM score:** Standing for "Physiological and Operative Severity Score for the enUmeration of Mortality and morbidity," it is used to predict **surgical risk and outcomes** (mortality/morbidity) rather than specifically grading wound infection. **High-Yield Clinical Pearls for NEET-PG:** * **CDC Definition of SSI:** SSIs are categorized into Superficial Incisional, Deep Incisional, and Organ/Space infections. * **Southampton Scoring System:** Another common system used for grading wound healing and infection. * **Timing:** Most SSIs occur within 30 days of surgery (or up to 1 year if an implant is placed).

Practice by Chapter

Wound Healing and Care

Practice Questions

Surgical Infections

Practice Questions

Fluid and Electrolyte Management

Practice Questions

Nutrition in Surgical Patients

Practice Questions

Hemostasis and Blood Transfusion

Practice Questions

Surgical Instruments and Equipment

Practice Questions

Sutures and Stapling Devices

Practice Questions

Minimal Access Surgery Principles

Practice Questions

Surgical Complications

Practice Questions

Anesthesia Principles for Surgeons

Practice Questions

Surgical Oncology Principles

Practice Questions

Evidence-Based Surgery

Practice Questions

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