General Surgery Principles Practice Questions

Q: Tissue adhesive glue contains which of the following substances?

Cyanoacrylate. **Explanation:** **Cyanoacrylate** is the primary component of medical-grade tissue adhesives (e.g., Dermabond). When it comes into contact with moisture on the skin surface, it undergoes an exothermic polymerization reaction, forming a strong, flexible bond that bridges wound edges. In surgery, it is used for closing small, tension-free incisions and as a microbial barrier. **Analysis of Incorrect Options:** * **B. Ethanolamine:** This is a sclerosing agent (Ethanolamine oleate) used primarily in the endoscopic treatment of bleeding esophageal varices, not as a tissue adhesive. * **C. Methacrylate:** Specifically Methyl methacrylate, this is "bone cement." It is used in orthopedic surgery for fixing prosthetic implants to bone but is not used as a topical tissue glue for skin closure. * **D. Polychloroprene:** This is a synthetic rubber (Neoprene) used in the manufacturing of surgical gloves and medical supports; it has no adhesive properties for wound closure. **High-Yield Clinical Pearls for NEET-PG:** * **Mechanism:** Polymerization occurs upon contact with hydroxyl ions (water/blood). * **Advantages:** It provides a waterproof seal, acts as a barrier to bacteria, and eliminates the need for suture removal. * **Contraindications:** Do not use on infected wounds, mucosal surfaces, or high-tension areas (like joints) unless reinforced. * **Types:** *Butyl-cyanoacrylate* (faster setting, more brittle) and *Octyl-cyanoacrylate* (stronger, more flexible, preferred for long incisions).

Q: HIPEC is used for?

Treating peritoneal metastasis. **Explanation:** **HIPEC (Hyperthermic Intraperitoneal Chemotherapy)** is a specialized treatment modality used primarily for **peritoneal carcinomatosis** (metastasis to the lining of the abdominal cavity). The procedure involves two main steps: 1. **Cytoreductive Surgery (CRS):** All visible tumor nodules are surgically removed from the abdomen. 2. **Chemotherapy Infusion:** Heated chemotherapy drugs (usually 41°C to 43°C) are circulated within the abdominal cavity for 60–90 minutes. **Why Option C is correct:** The "Hyperthermic" component enhances the cytotoxicity of the chemotherapy and increases drug penetration into any remaining microscopic tumor cells. By delivering the drug directly into the peritoneum, a high local concentration is achieved with minimal systemic toxicity, making it the gold standard for peritoneal surface malignancies (e.g., pseudomyxoma peritonei, mesothelioma, and select cases of colorectal or ovarian cancer). **Why other options are incorrect:** * **Option A:** Bone metastases are typically identified using Technetium-99m MDP bone scans or PET-CT. * **Option B:** Breast cancer screening relies on Mammography (standard) or MRI (high-risk patients). * **Option C:** Tuberculosis (specifically abdominal TB) is diagnosed via imaging (CT), ADA levels in ascitic fluid, or laparoscopy with biopsy. **High-Yield Clinical Pearls for NEET-PG:** * **Sugarbaker’s Procedure:** Another name for the combination of CRS and HIPEC. * **Common Drugs used:** Mitomycin C (Colorectal), Cisplatin/Doxorubicin (Ovarian/Mesothelioma), and Oxaliplatin. * **PCI (Peritoneal Cancer Index):** A scoring system used to determine the extent of peritoneal spread and eligibility for HIPEC. * **Best Prognosis:** HIPEC shows the best outcomes in **Pseudomyxoma Peritonei** (secondary to appendiceal mucinous neoplasms).

Q: What is the recommended patient position for optimal insertion of a Ryle's tube?

Sitting position with neck slightly flexed. ### Explanation The correct position for Ryle’s tube (Nasogastric tube) insertion is the **sitting position with the neck slightly flexed**. **Why it is correct:** The goal during NG tube insertion is to guide the tube into the esophagus while avoiding the trachea. 1. **Sitting/High-Fowler’s position** uses gravity to help the tube descend and reduces the risk of aspiration. 2. **Neck Flexion (Chin-to-chest):** This is the most critical maneuver. Flexing the neck narrows the airway opening (laryngeal inlet) and widens the esophageal opening. It also facilitates the "swallowing" reflex, which further helps the tube enter the esophagus. **Why other options are incorrect:** * **Sitting with neck extended:** Extending the neck straightens the path to the trachea, significantly increasing the risk of accidental tracheal intubation and lung trauma. * **Left lateral position:** While used for gastric lavage or in unconscious patients to prevent aspiration, it is not the "optimal" position for active insertion in a conscious patient as it lacks the anatomical advantage of flexion. * **Supine position:** This increases the risk of the tube coiling in the pharynx and poses a high risk of aspiration if the patient gags or vomits. **High-Yield Clinical Pearls for NEET-PG:** * **Measurement:** Measure the tube length from the **Nose to the Earlobe to the Xiphoid process (NEX)**. * **Gold Standard Confirmation:** A **Chest X-ray** is the most reliable method to confirm correct placement. * **Bedside Confirmation:** Aspirating gastric contents (pH <5.5) is the preferred bedside method. The "whoosh test" (auscultation over the epigastrium) is now considered unreliable. * **Contraindication:** Avoid NG tubes in patients with **Basal Skull Fractures** (risk of intracranial insertion) or **Esophageal Varices/Strictures**.

Q: Which of the following is NOT included in the SIRS criteria?

Oliguria. The **Systemic Inflammatory Response Syndrome (SIRS)** is a clinical syndrome characterized by a robust inflammatory response to various insults (infectious or non-infectious). The criteria focus on vital signs and laboratory parameters rather than end-organ dysfunction. ### Why Oliguria is the Correct Answer **Oliguria** (low urine output) is a sign of **organ dysfunction** (specifically acute kidney injury). While it is a critical component of the **SOFA (Sequential Organ Failure Assessment) score** and is used to define "Severe Sepsis" in older classifications, it is **not** part of the four SIRS criteria. ### Explanation of Incorrect Options The SIRS criteria require at least **two** of the following: * **Tachycardia (Option B):** Heart rate > 90 beats per minute. * **Leukocytosis/Leukopenia (Options C & D):** White blood cell count > 12,000/mm³, 10% immature (band) forms. * **Temperature:** > 38°C (100.4°F) or 20 breaths per minute or PaCO₂ < 32 mmHg. ### High-Yield Clinical Pearls for NEET-PG * **Sepsis Definition:** Sepsis was traditionally defined as SIRS + a documented source of infection. However, the **Sepsis-3 guidelines** now define sepsis as life-threatening organ dysfunction caused by a dysregulated host response to infection (SOFA score increase of ≥2). * **qSOFA (Quick SOFA):** A bedside tool used to identify patients at risk of poor outcomes. It includes: 1. Altered mental status (GCS < 15) 2. Systolic BP ≤ 100 mmHg 3. Respiratory rate ≥ 22/min. * **Note:** SIRS is sensitive but not specific; it can be triggered by trauma, burns, or pancreatitis without infection.

Q: According to NHS protocol, what is the correct sequence for surgical handovers and checks?

Sign in, time out, sign out. The correct sequence follows the **WHO Surgical Safety Checklist**, which has been adopted globally (including by the NHS) to reduce morbidity and mortality in the operating theatre. The protocol is designed to follow the chronological flow of a surgical procedure: 1. **Sign In (Before Induction of Anesthesia):** This occurs before the patient is anesthetized. It involves confirming the patient’s identity, the surgical site, the procedure, and consent. It also includes checks for anesthesia safety, pulse oximetry, and allergy/airway risks. 2. **Time Out (Before Skin Incision):** This is a "surgical pause" involving the entire team (surgeon, anesthetist, and nurse). They verbally confirm the patient’s name, the procedure, the site, and anticipate critical events (blood loss, equipment needs, antibiotic prophylaxis). 3. **Sign Out (Before the Patient Leaves the OR):** This occurs during or immediately after wound closure. The nurse verbally confirms the name of the procedure, ensures instrument/sponge counts are correct, and labels any specimens. **Why other options are incorrect:** * **Options A, B, and D** are incorrect because they disrupt the logical clinical timeline. You cannot "Sign Out" (post-op) before you "Sign In" (pre-op), and the "Time Out" must occur immediately before the incision to ensure the final safety check is fresh in the team's mind. **High-Yield Clinical Pearls for NEET-PG:** * **Origin:** The checklist was introduced by the WHO in **2008** (Safe Surgery Saves Lives campaign). * **Goal:** To reduce "Never Events" (e.g., wrong-site surgery). * **Key Step:** The **Time Out** is the only phase where the *entire* surgical team must stop and participate simultaneously. * **Antibiotics:** Administration of prophylactic antibiotics (if indicated) should be confirmed during the **Time Out** (ideally within 60 minutes before incision).

Q: Which one of the following is not included in the treatment of malignant melanoma?

Radiation. **Explanation:** The primary management of malignant melanoma is surgical, as this tumor is characteristically **radioresistant**. While radiation therapy may be used in specific palliative settings (e.g., painful bone metastases or brain involvement), it is **not** a standard component of the primary curative treatment algorithm for melanoma, unlike many other solid tumors. **Analysis of Options:** * **A. Radiation (Correct):** Melanoma cells have a high capacity for sublethal damage repair, making them resistant to standard radiotherapy. Therefore, it is not included in the primary treatment protocol. * **B. Surgical Excision:** This is the **gold standard** and definitive treatment. The margin of excision depends on the **Breslow thickness** (e.g., 1 cm margin for tumors 2 mm). * **C. Chemotherapy:** Historically used for metastatic disease (e.g., Dacarbazine), though it has largely been superseded by targeted therapies. * **D. Immunotherapy:** This has revolutionized melanoma care. Agents like **Ipilimumab** (CTLA-4 inhibitor) and **Pembrolizumab/Nivolumab** (PD-1 inhibitors) are now standard for advanced or metastatic stages. **High-Yield Clinical Pearls for NEET-PG:** * **Most Important Prognostic Factor:** Breslow Thickness (vertical depth of invasion in mm). * **Staging:** Sentinel Lymph Node Biopsy (SLNB) is the most important procedure for staging the regional node basin in tumors >0.8 mm or those with ulceration. * **Common Mutation:** **BRAF V600E** (Targeted by Vemurafenib). * **ABCDE Criteria:** Asymmetry, Border irregularity, Color variegation, Diameter (>6mm), and Evolving.

Q: A patient underwent emergency laparotomy and ileostomy closure. Three months later, he developed swelling in the ileostomy region with a cough impulse. What is this condition known as?

Incisional hernia. ### Explanation **Correct Answer: B. Incisional Hernia** The patient presents with a swelling at the site of a previous surgical wound (ileostomy closure) that demonstrates a **cough impulse**, which is the hallmark of a hernia. An **incisional hernia** is defined as the protrusion of abdominal contents through a defect in the abdominal wall at the site of a previous surgical incision or stoma closure. When an ileostomy is closed, the site becomes a point of potential weakness in the fascia. If the abdominal wall fails to heal adequately, intra-abdominal pressure can force contents through this scar, resulting in an incisional hernia. **Why other options are incorrect:** * **A. Lumbar hernia:** These occur through the posterior abdominal wall in the superior (Grynfelt-Lesshaft) or inferior (Petit’s) lumbar triangles. They are not related to anterior stoma sites. * **C. Spigelian hernia:** This occurs through the *linea semilunaris* (at the level of the arcuate line). It is a lateral ventral hernia but is spontaneous and not typically associated with surgical scars. * **D. Parastomal hernia:** This is a specific type of incisional hernia that occurs **adjacent to an active, functioning stoma**. Since this patient had an **ileostomy closure**, the stoma no longer exists; therefore, the resulting defect is classified as a standard incisional hernia. **Clinical Pearls for NEET-PG:** * **Risk Factors:** Wound infection (most common), obesity, malnutrition, and emergency surgery (as seen in this case). * **Classification:** Incisional hernias are a subtype of ventral hernias. * **Management:** Small defects may be repaired primarily, but large defects (>2 cm) usually require **mesh repair** (Lichtenstein or Laparoscopic IPOM) to reduce the high recurrence rate. * **Distinction:** Always check if the stoma is present. **Present = Parastomal; Closed = Incisional.**

Q: What is the normal intra-abdominal pressure?

5 mm Hg. **Explanation:** **1. Understanding the Correct Answer (A):** Intra-abdominal pressure (IAP) is the steady-state pressure concealed within the abdominal cavity. In a healthy, resting adult who is breathing spontaneously, the normal IAP ranges from **0 to 5 mm Hg**. It is influenced by the compliance of the abdominal wall and the volume of the abdominal contents. In critically ill patients, a baseline IAP of 5–7 mm Hg is often considered normal. **2. Analysis of Incorrect Options:** * **B (10 mm Hg):** While slightly elevated, this is often seen in obese patients or those with mild ileus, but it exceeds the physiological "normal" baseline. * **C (15 mm Hg):** This represents **Intra-abdominal Hypertension (IAH)**. Grade I IAH starts at 12–15 mm Hg. This is also the standard pressure used during laparoscopic surgery to create a pneumoperitoneum. * **D (20 mm Hg):** This is a dangerously high pressure. Sustained IAP >20 mm Hg associated with new organ dysfunction defines **Abdominal Compartment Syndrome (ACS)**, a surgical emergency. **3. NEET-PG High-Yield Pearls:** * **Gold Standard Measurement:** IAP is most commonly measured indirectly via **intra-vesical (bladder) pressure** using a Foley catheter (transducer method). * **Abdominal Perfusion Pressure (APP):** Calculated as MAP minus IAP. An APP >60 mm Hg is a good predictor of survival in IAH. * **Laparoscopy:** During surgery, IAP is maintained at **12–15 mm Hg**. Pressures above this can decrease venous return and compromise ventilation. * **Grades of IAH:** * Grade I: 12–15 mm Hg * Grade II: 16–20 mm Hg * Grade III: 21–25 mm Hg * Grade IV: >25 mm Hg

Question 1

Tissue adhesive glue contains which of the following substances?

Accepted Answer

Cyanoacrylate

Answer

Ethanolamine

Answer

Methacrylate

Answer

Polychloroprene

Question 2

HIPEC is used for?

Accepted Answer

Treating peritoneal metastasis

Answer

Identifying bone metastases

Answer

Screening protocol for breast cancer

Answer

Diagnosing tuberculosis

Question 3

Regarding the management of diabetic foot, which of the following statements are TRUE?

Accepted Answer

Strict diabetic control, topical antibiotics, and diabetic ulcers being trophic ulcers are true; venous system involvement and early amputation are false.

Answer

Strict diabetic control, venous system involvement, and topical antibiotics are true; early amputation and trophic ulcers are false.

Answer

All statements are false.

Answer

All statements are true.

Question 4

What is the recommended patient position for optimal insertion of a Ryle's tube?

Accepted Answer

Sitting position with neck slightly flexed

Answer

Left lateral position

Answer

Sitting position with neck slightly extended

Answer

Supine position

Question 5

Which of the following is NOT included in the SIRS criteria?

Accepted Answer

Oliguria

Answer

Tachycardia

Answer

Leukocytosis

Answer

Leukopenia

Question 6

According to NHS protocol, what is the correct sequence for surgical handovers and checks?

Accepted Answer

Sign in, time out, sign out

Answer

Sign out, sign in, time out

Answer

Sign out, time out, sign in

Answer

Sign in, sign out, time out

Question 7

Which of the following statements is true regarding an epigastric hernia?

Accepted Answer

Always located above the umbilicus on either side of the midline.

Answer

Always located above the umbilicus and in the midline.

Answer

May be located above or below the umbilicus but is always in the midline.

Answer

Can be seen anywhere on the abdomen.

Question 8

Which one of the following is not included in the treatment of malignant melanoma?

Accepted Answer

Radiation

Answer

Surgical excision

Answer

Chemotherapy

Answer

Immunotherapy

Question 9

A patient underwent emergency laparotomy and ileostomy closure. Three months later, he developed swelling in the ileostomy region with a cough impulse. What is this condition known as?

Accepted Answer

Incisional hernia

Answer

Lumbar hernia

Answer

Spigelian hernia

Answer

Parastomal hernia

Question 10

What is the normal intra-abdominal pressure?

Accepted Answer

5 mm Hg

Answer

10 mm Hg

Answer

15 mm Hg

Answer

20 mm Hg

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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