General Surgery Principles Practice Questions

Q: This instrument, historically used for opening sinus ostia in sinusitis, has a blunt tip. Surgeons currently use it to drain abscesses in which of the following regions?

Back. ***Back*** - The **blunt-tipped sinus forceps** (Luc's forceps) is ideal for **Hilton's method** of abscess drainage in the back, particularly in the **lumbar and gluteal regions**, where blunt dissection safely separates tissue planes. - The **blunt tip** prevents injury to underlying structures like **muscles and fascia** while effectively draining deep abscesses in areas with thick tissue layers. *Neck* - Neck abscesses require **precise sharp dissection** due to proximity to critical structures like **carotid vessels**, **jugular veins**, and **airway**. - The **complex anatomy** and risk of vascular injury make blunt instruments unsuitable for neck abscess drainage. *Axilla* - Axillary abscesses are typically drained using **sharp instruments** due to proximity to **brachial plexus**, **axillary vessels**, and **lymph nodes**. - The **confined space** and neurovascular structures require more **controlled dissection** than blunt instruments can provide. *Parotid* - Parotid abscesses require **careful sharp dissection** to avoid injury to the **facial nerve** and its branches. - The **superficial location** and risk of **facial nerve paralysis** make blunt forceps inappropriate for this delicate region.

Q: A patient with Child's C cirrhosis has had repeated episodes of variceal bleeding and ascites. What is the treatment of choice?

Liver transplant. **Explanation:** The management of variceal bleeding in cirrhosis is determined by the severity of liver dysfunction, typically graded by the **Child-Pugh Classification**. **Why Liver Transplant is the Correct Answer:** Child-Pugh Class C represents end-stage liver disease (ESLD) with a high mortality rate and poor functional reserve. In this patient, the presence of both **refractory ascites** and **recurrent variceal bleeding** indicates that the liver can no longer perform its synthetic or metabolic functions. While other treatments manage the complications (symptoms), only a **Liver Transplant** addresses the underlying pathology and offers a definitive cure and long-term survival. **Analysis of Incorrect Options:** * **TIPS (Option B):** While TIPS is effective for controlling portal hypertension and refractory ascites, it is generally used as a "bridge to transplant" in Child’s C patients. It carries a high risk of precipitating hepatic encephalopathy in patients with already poor liver function. * **EVL (Option C):** Endoscopic Variceal Ligation is the gold standard for the *acute* management of bleeding and primary/secondary prophylaxis. However, it does not treat the ascites or the underlying liver failure. * **Surgical Shunt (Option D):** Portosystemic shunts (e.g., distal splenorenal shunt) are contraindicated in Child’s C patients due to extremely high perioperative mortality and the risk of liver failure. **NEET-PG High-Yield Pearls:** * **Child-Pugh Score Parameters:** Remember the mnemonic **ABCDE** (Albumin, Bilirubin, Coagulation/INR, Distension/Ascites, Encephalopathy). * **Child’s C Score:** ≥10 points (One-year survival is only ~45%). * **MELD Score:** Used primarily for prioritizing patients on the liver transplant waiting list. * **Treatment of Choice:** For Child’s A/B with variceal bleed, EVL + Beta-blockers is preferred. For Child’s C, transplant is the definitive answer.

Q: What is the treatment of an uncomplicated hydatid cyst in the lung?

Enucleation. **Explanation:** The treatment of choice for an **uncomplicated pulmonary hydatid cyst** is **Enucleation (Barrett’s technique)**. Unlike the liver, where the pericyst is thick and fibrous, the lung parenchyma is highly elastic and the pericyst is thin. This allows for the surgical removal of the intact endocyst while preserving the maximum amount of functional lung tissue. **Why Enucleation is Correct:** In Barrett’s technique, the surgeon incises the lung parenchyma and the thin pericyst. The intact cyst is then delivered (enucleated) by the anesthesiologist increasing airway pressure (Valsalva maneuver). This approach is preferred because it is lung-conserving and carries a low risk of complications in uncomplicated cases. **Analysis of Incorrect Options:** * **Marsupialisation:** This involves leaving the cavity open to drain. It is outdated for lung cysts as it leads to prolonged air leaks and increased risk of secondary infection. * **Lobectomy:** This is an aggressive procedure. It is reserved only for **complicated** cases where there is extensive lung destruction, multiple large cysts in one lobe, or severe secondary infection/bronchiectasis. * **Extended Tube Drainage:** This is not a definitive treatment for hydatid disease and carries a high risk of recurrence and biliary-bronchial fistulae (if associated with liver cysts). **Clinical Pearls for NEET-PG:** * **Water Lily Sign:** Seen on X-ray/CT when the endocyst ruptures and membranes float in the remaining fluid. * **Monod’s Sign (Air Crescent):** Air between the pericyst and exocyst. * **Medical Management:** Albendazole is given perioperatively to reduce the risk of recurrence from accidental spillage. * **PAIR (Puncture, Aspiration, Injection, Re-aspiration):** Generally **contraindicated** in the lung due to the high risk of anaphylaxis and tension pneumothorax.

Q: Surgical approaches for open thymectomy include all except?

Thoracoabdominal incision. **Explanation:** The thymus is located in the **anterior superior mediastinum**, lying behind the manubrium and body of the sternum. Surgical access must therefore focus on the midline of the chest or the lower neck. **Why Thoracoabdominal incision is the correct answer:** A **thoracoabdominal incision** is used to access the upper abdominal organs (like the esophagus or stomach) and the lower thoracic cavity simultaneously. Since the thymus is situated superiorly in the mediastinum, this incision is anatomically inappropriate and unnecessarily invasive, providing no direct access to the thymic bed. **Analysis of other options:** * **Median Sternotomy (Option B):** This is the **gold standard** and most common approach for open thymectomy. It provides excellent exposure of the entire thymus, both innominate veins, and the pleural spaces. * **Partial Median Sternotomy (Option D):** Also known as a "manubriotomy," this is a less invasive version of the full sternotomy, suitable for smaller thymomas or non-thymomatous myasthenia gravis. * **Transcervical Thymectomy (Option A):** This approach involves a transverse incision in the lower neck. While it offers less exposure than a sternotomy, it is a recognized open technique for simple thymectomy (often assisted by a sternal retractor). **High-Yield Clinical Pearls for NEET-PG:** * **Most common indication:** Myasthenia Gravis (to achieve remission) and Thymoma. * **Anatomical Landmark:** The thymus is most commonly found in the **Anterior Mediastinum**. * **Safe Dissection:** During thymectomy, the most critical structure to identify and protect is the **Phrenic Nerve**, which runs lateral to the thymus. * **Modern Trend:** While these are "open" approaches, **VATS (Video-Assisted Thoracoscopic Surgery)** and Robotic-assisted thymectomy are now the preferred minimally invasive standards in many centers.

Q: Which suture material is least adherent to tissue and possesses plasticity?

Prolene. **Explanation:** The correct answer is **Prolene (Polypropylene)**. **Why Prolene is Correct:** Prolene is a synthetic, non-absorbable, monofilament suture. It is characterized by its **high tensile strength** and **extreme smoothness**, making it the least adherent to tissues. This property allows for "atraumatic" removal, which is why it is the gold standard for intradermal (subcuticular) skin closures. Furthermore, Prolene possesses **plasticity**—the ability to expand and accommodate tissue edema without cutting through the tissue, and then maintaining its shape once the swelling subsides. **Analysis of Incorrect Options:** * **Nylon (Ethilon):** While also a monofilament with low tissue reactivity, it possesses **elasticity** (returns to original length) rather than plasticity. It also has high "memory," making it stiffer and more prone to knot slippage compared to Prolene. * **PDS (Polydioxanone):** This is a synthetic **absorbable** monofilament. While it has low friction, it is not used for its non-adherent properties in the long term as it eventually undergoes slow hydrolysis. * **Silk:** A natural, braided material. It has the **highest tissue reactivity** and adherence among the options. Its braided nature allows bacteria to lodge within the strands, increasing infection risk. **NEET-PG High-Yield Pearls:** * **Suture of choice for Vascular Surgery:** Prolene (due to its non-thrombogenic nature and strength). * **Suture of choice for Contaminated wounds:** Monofilaments (like Prolene or PDS) are preferred over braided sutures (like Silk or Vicryl). * **Memory:** The tendency of a suture to return to its original packaged shape (High in Nylon/Prolene). * **Capillarity:** The process by which fluid/bacteria are "wicked" into the suture (Highest in braided sutures like Silk).

Q: A flexible bronchoscope is designed for all of the following functions EXCEPT?

Removal of foreign bodies. **Explanation:** The core concept distinguishing bronchoscopy techniques is the trade-off between **maneuverability** and **instrumental capacity**. **Why "Removal of foreign bodies" is the correct answer:** While a flexible bronchoscope can occasionally be used to retrieve small, distal foreign bodies using specialized baskets, it is **not designed** for this purpose. The gold standard for foreign body removal is **Rigid Bronchoscopy**. Rigid bronchoscopes have a wide, hollow bore that allows for the passage of large grasping forceps and provides a secure airway to protect the vocal cords during the extraction of sharp or bulky objects. **Analysis of other options:** * **Ventilation:** Modern flexible bronchoscopes can be passed through an endotracheal tube or laryngeal mask airway (LMA), allowing for continuous ventilation during the procedure. * **Drainage of secretions:** One of the primary therapeutic uses of flexible bronchoscopy is "pulmonary toilet"—the suctioning of thick mucus plugs or secretions in collapsed lung segments. * **Performing biopsy:** Flexible bronchoscopes have small working channels (typically 2.0–2.8 mm) designed specifically for cytology brushes and transbronchial needle aspiration (TBNA) to sample peripheral or central lesions. **High-Yield Clinical Pearls for NEET-PG:** * **Rigid Bronchoscopy:** Preferred for massive hemoptysis (better suctioning), foreign body removal, and pediatric airway emergencies. * **Flexible Bronchoscopy:** Preferred for diagnostic visualization of the bronchial tree, peripheral lung biopsies, and difficult intubations. * **Anesthesia:** Flexible bronchoscopy is usually performed under local anesthesia/conscious sedation, whereas rigid bronchoscopy requires general anesthesia.

Q: Which of the following complications is likely to result after several units of blood have been transfused?

Metabolic alkalosis. Explanation: The correct answer is **Metabolic Alkalosis**. **Why it is correct:** Stored blood contains **sodium citrate** as an anticoagulant. When a patient receives a massive blood transfusion (typically defined as >10 units in 24 hours or >4 units in 1 hour), the liver metabolizes the citrate into **bicarbonate** ($HCO_3^-$). The accumulation of bicarbonate in the bloodstream leads to an increase in blood pH, resulting in metabolic alkalosis. This is a classic "post-transfusion" metabolic derangement. **Why other options are incorrect:** * **Metabolic Acidosis:** While stored blood is slightly acidic due to the accumulation of lactic acid and pyruvic acid during storage, the body’s metabolic conversion of citrate to bicarbonate usually overrides this, leading to alkalosis rather than acidosis in the post-transfusion period. * **Respiratory Alkalosis/Acidosis:** These conditions are primarily driven by changes in $CO_2$ levels due to ventilation abnormalities (hyperventilation or hypoventilation). Blood transfusion does not directly alter the respiratory drive or $CO_2$ exchange in a way that consistently produces these states. **High-Yield Clinical Pearls for NEET-PG:** * **Citrate Toxicity:** Citrate not only causes alkalosis but also binds to ionized calcium, leading to **Hypocalcemia**. Look for signs like Tetany or QTc prolongation on ECG. * **Hyperkalemia:** Stored RBCs leak potassium over time. Massive transfusion can lead to transient hyperkalemia, especially in patients with renal failure. * **Hypothermia:** Rapid infusion of cold blood can lead to cardiac arrhythmias. * **2,3-DPG Deficiency:** Stored blood has low 2,3-DPG, which shifts the Oxygen-Dissociation Curve to the **Left**, meaning hemoglobin holds onto oxygen more tightly, potentially reducing tissue oxygenation.

Q: Reactionary hemorrhage occurs within which time frame?

24 hours. **Explanation:** Hemorrhage is classified into three types based on the timing of the bleed relative to the surgical procedure or injury. Understanding these timelines is crucial for NEET-PG. **1. Why "24 hours" is correct:** **Reactionary hemorrhage** occurs within **24 hours** of surgery (typically between 4–6 hours). It is caused by the "reaction" of the body as it recovers from the immediate physiological stress of surgery. As the patient’s blood pressure rises back to normal levels (following the recovery from anesthetic shock or fluid resuscitation) or as vasodilation occurs, small vessels that were not bleeding during the hypotensive state begin to bleed. A common cause is a slipped ligature or a dislodged clot. **2. Why the other options are incorrect:** * **B, C, and D (1–6 days):** These timeframes are incorrect for reactionary hemorrhage. Bleeding that occurs after 24 hours (typically between **7–14 days**) is classified as **Secondary hemorrhage**. This is usually caused by **infection** or tissue sloughing that erodes a vessel wall. **Clinical Pearls & High-Yield Facts:** * **Primary Hemorrhage:** Occurs at the time of operation or injury (e.g., an inadequately tied vessel). * **Reactionary Hemorrhage (The "Recovery" Bleed):** Key triggers include recovery from anesthesia, coughing, vomiting, or over-vigorous fluid resuscitation raising the BP. * **Secondary Hemorrhage (The "Infection" Bleed):** Always suspect a local wound infection or pressure necrosis (e.g., from a drain) if bleeding occurs a week after surgery. * **Management:** Reactionary hemorrhage often requires a return to the operating theater to identify and ligate the bleeding vessel.

Q: Which of the following statements is true about hernias?

All of the above.. This question tests fundamental knowledge regarding the classification, pathophysiology, and complications of abdominal wall hernias. **Explanation of Options:** * **Option A (External abdominal hernias are common):** External hernias (where the sac protrudes through a defect in the abdominal wall, e.g., inguinal, femoral, umbilical) are among the most frequent surgical presentations. Inguinal hernias alone have a lifetime risk of approximately 27% in men. * **Option B (Direct hernias are usually acquired):** Unlike indirect hernias, which result from a congenital patent processus vaginalis, direct inguinal hernias are acquired. They occur due to weakness in the fascia of the posterior wall of the inguinal canal (Hesselbach’s triangle), often precipitated by chronic increases in intra-abdominal pressure (e.g., chronic cough, straining, or heavy lifting) in older age. * **Option C (Strangulation is common in femoral hernias):** Femoral hernias have the highest risk of strangulation (approx. 20-40%) among all hernias. This is due to the rigid, narrow boundaries of the femoral canal (specifically the lacunar ligament), which easily constricts the neck of the hernia sac. Since all three statements are clinically accurate, **Option D** is the correct answer. **High-Yield Clinical Pearls for NEET-PG:** * **Most common hernia overall:** Indirect Inguinal Hernia (in both males and females). * **Most common hernia in females:** Indirect Inguinal Hernia (though femoral hernias are more common in females than in males). * **Richter’s Hernia:** Only part of the bowel wall is trapped; it can strangulate without causing complete intestinal obstruction. * **Maydl’s Hernia:** "Hernia-in-W" where the loop of bowel inside the abdomen becomes gangrenous. * **Surgery of Choice:** Lichtenstein tension-free mesh repair is the gold standard for inguinal hernias.

Q: Cock’s peculiar tumour is described as:

An infected sebaceous cyst. **Explanation:** **Cock’s Peculiar Tumour** is a classic surgical misnomer. It is not a true neoplasm, but rather an **infected, proliferating sebaceous cyst**, typically occurring on the scalp. 1. **Why Option A is Correct:** When a sebaceous cyst on the scalp becomes infected and ulcerates, the lining of the cyst (sebaceous epithelium) undergoes exuberant proliferation. This results in a fungating, granulomatous mass that resembles a squamous cell carcinoma (SCC). Despite its alarming, "tumour-like" appearance, it is benign and originates from a simple sebaceous cyst. 2. **Why Other Options are Incorrect:** * **Options B, C, and D:** While Cock’s peculiar tumour occurs on the scalp and may appear to involve the bone due to its size and fixation, it is strictly a lesion of the skin and subcutaneous tissue. It does not arise from the bone (osteomyelitis) or the diploe of the skull. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Appearance:** It presents as a foul-smelling, vascular, and ulcerated mass on the scalp. * **Differential Diagnosis:** Its primary differential is **Squamous Cell Carcinoma (SCC)**. It is distinguished from SCC by the absence of induration at the base and the absence of regional lymphadenopathy. * **Management:** Wide local excision is the treatment of choice. * **Key Feature:** It is a "proliferating trichilemmal cyst" in modern pathological terms. * **Memory Aid:** "Cock’s" = Scalp; "Peculiar" = Looks like cancer but is actually an infected cyst.

Question 1

This instrument, historically used for opening sinus ostia in sinusitis, has a blunt tip. Surgeons currently use it to drain abscesses in which of the following regions?

Accepted Answer

Back

Answer

Neck

Answer

Axilla

Answer

Parotid

Question 2

A patient with Child's C cirrhosis has had repeated episodes of variceal bleeding and ascites. What is the treatment of choice?

Accepted Answer

Liver transplant

Answer

Transjugular intrahepatic portosystemic shunt (TIPS)

Answer

Endoscopic variceal ligation (EVL)

Answer

Surgical shunt

Question 3

What is the treatment of an uncomplicated hydatid cyst in the lung?

Accepted Answer

Enucleation

Answer

Marsupialisation

Answer

Lobectomy

Answer

Extended tube drainage

Question 4

Surgical approaches for open thymectomy include all except?

Accepted Answer

Thoracoabdominal incision

Answer

Transcervical thymectomy

Answer

Median sternotomy

Answer

Partial median sternotomy

Question 5

Which suture material is least adherent to tissue and possesses plasticity?

Accepted Answer

Prolene

Answer

Nylon

Answer

PDS

Answer

Silk

Question 6

A flexible bronchoscope is designed for all of the following functions EXCEPT?

Accepted Answer

Removal of foreign bodies

Answer

Ventilation

Answer

Drainage of secretions

Answer

Performing biopsy

Question 7

Which of the following complications is likely to result after several units of blood have been transfused?

Accepted Answer

Metabolic alkalosis

Answer

Metabolic acidosis

Answer

Respiratory alkalosis

Answer

Respiratory acidosis

Question 8

Reactionary hemorrhage occurs within which time frame?

Accepted Answer

24 hours

Answer

1-2 days

Answer

2-4 days

Answer

4-6 days

Question 9

Which of the following statements is true about hernias?

Accepted Answer

All of the above.

Answer

External abdominal hernias are common.

Answer

Direct hernias are usually acquired.

Answer

Strangulation is common in femoral hernias.

Question 10

Cock’s peculiar tumour is described as:

Accepted Answer

An infected sebaceous cyst

Answer

Osteomyelitis of the skull

Answer

A cyst in the skull

Answer

A tumour of the skull

General Surgery Principles — MCQs

General Surgery Principles — MCQs

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