General Surgery Principles — MCQs

General Surgery Principles Indian Medical PG Practice Questions and MCQs

Question 961: Splenectomy is most useful in:

A. Thrombocytopenia
B. Sickle cell anemia
C. Henoch-Schönlein purpura
D. Hereditary spherocytosis (Correct Answer)

Explanation: ***Hereditary spherocytosis*** - Splenectomy is a definitive treatment for **hereditary spherocytosis** as it removes the primary site where abnormally shaped **spherocytes** are selectively destroyed. - While it does not cure the genetic defect, it significantly reduces **hemolysis** and **anemia**, improving quality of life. *Thrombocytopenia* - Splenectomy can be considered for certain types of **immune thrombocytopenia (ITP)** that are refractory to medical therapy, but it is not the most common or initial treatment. - In ITP, the spleen is a major site of **platelet destruction** and **antibody production**, making splenectomy a potential option in selected cases. *Henoch-Schönlein purpura* - **Henoch-Schönlein purpura** (now known as **IgA vasculitis**) is a **self-limiting vasculitis** that primarily affects small blood vessels and typically resolves with supportive care. - Splenectomy plays no role in the management of **Henoch-Schönlein purpura** as the pathophysiology does not involve splenic dysfunction or destruction of blood cells. *Sickle cell anemia* - Splenectomy is generally **contraindicated** in **sickle cell anemia** patients beyond early childhood, as most older patients experience **autosplenectomy** due to recurrent sickling and infarction. - In very young children, splenectomy might be considered for recurrent **splenic sequestration crises**, but this is not a common or universally applied treatment.

Question 962: Tracheostomy is not indicated in which of the following conditions?

A. Bronchiectosis
B. Atelectasis
C. Emphysema
D. Pneumothorax (Correct Answer)

Explanation: ***Pneumothorax*** - A **tracheostomy** is a surgical procedure to create an opening in the trachea to secure an airway or facilitate ventilation. It is not a direct treatment for a **pneumothorax**, which involves air accumulation in the pleural space. - Management of **pneumothorax** typically involves **chest tube insertion** to evacuate air and re-expand the lung, not an artificial airway in the trachea. *Emphysema* - In severe cases of **emphysema**, a tracheostomy may be indicated to facilitate **long-term mechanical ventilation** or for **pulmonary hygiene** in patients with chronic respiratory failure. - It can help in weaning off ventilation or managing copious secretions that these patients often develop. *Bronchiectasis* - Patients with **bronchiectasis** often suffer from **chronic airway obstruction**, recurrent infections, and copious, thick secretions. - A **tracheostomy** might be considered for **long-term airway access** to assist with **pulmonary toilet** and to mechanically ventilate if acute exacerbations lead to respiratory failure. *Atelectasis* - In cases of **severe atelectasis** (lung collapse) due to **mucus plugging** or **airway obstruction** that cannot be cleared by less invasive means, a tracheostomy may be performed. - It allows for **direct suctioning** of the lower airways and potentially for continuous positive airway pressure (CPAP) via the tracheostomy to help re-expand the collapsed lung segments.

Question 963: Components separation technique in hernia helps by:

A. Lower recurrence
B. Decrease suture line tension (Correct Answer)
C. Lesser infection
D. None of the options

Explanation: ***Decrease suture line tension*** - The **components separation technique** aims to reconstruct large abdominal wall defects by primarily approximating the patient's own tissues. - By releasing the external oblique aponeurosis, the technique allows for medial advancement of the rectus abdominis muscles, thereby **reducing tension** on the primary repair. *Lower recurrence* - While reducing tension generally improves repair durability, using the components separation technique alone without mesh has been associated with higher recurrence rates compared to repairs augmented with **prosthetic mesh**. - **Mesh reinforcement** is often combined with this technique to enhance long-term outcomes and further reduce recurrence. *Lesser infection* - The components separation technique involves extensive dissection and creation of large tissue planes, which can potentially increase the risk of **wound complications** like seroma and infection. - While it avoids the use of foreign material in the central repair, the overall infection risk is not necessarily lower than other techniques, especially when compared to repairs that primarily use mesh without extensive tissue dissection.

Question 964: On what basis are surgical instruments classified for sterilization and infection control according to standard medical device classification systems?

A. Type of surgical procedure
B. Method of use in surgical procedures
C. Risk classification based on potential patient harm (Correct Answer)
D. Material composition and biocompatibility requirements

Explanation: ***Risk classification based on potential patient harm*** - Surgical instruments are classified primarily based on the **potential infection risk** and harm they pose to patients, following the **Spaulding Classification System** (adopted by CDC and aligned with ISO sterilization standards). - This classification divides instruments into **Critical** (enter sterile tissue/vascular system), **Semi-critical** (contact mucous membranes), and **Non-critical** (contact intact skin). - The classification dictates the level of **sterilization, disinfection, and quality control** required for each instrument category to ensure patient safety. *Method of use in surgical procedures* - While the method of use is considered in instrument design, it is not the primary basis for **risk classification**. - **Risk to the patient** (infection potential) is the fundamental criterion that determines sterilization requirements. *Type of surgical procedure* - Instruments are often designed for specific **surgical procedures**, but this is a secondary consideration. - The **inherent infection risk** of the instrument based on tissue contact level, regardless of procedure type, is the guiding principle. *Material composition and biocompatibility requirements* - **Material composition and biocompatibility** are crucial aspects of instrument manufacturing and must meet ISO standards. - However, they are requirements for manufacturing safety, not the primary basis for the sterilization/infection control classification system.

Question 965: The tensile strength of a wound after laparoscopic cholecystectomy in a 30-year-old woman depends upon:

A. Granulation tissue
B. Macrophage activity/invasion
C. Extensive crosslinking of tropocollagen (Correct Answer)
D. Replacement of type 3 collagen

Explanation: ***Extensive crosslinking of tropocollagen*** - Tensile strength is significantly enhanced by the **crosslinking of tropocollagen**, which stabilizes the collagen matrix in the wound [1]. - This process is crucial for the **maturation phase** of wound healing, leading to increased strength over time [1]. *Replacement of type 3 collagen* - Although type 3 collagen is replaced by type 1 during healing, the mere replacement does not directly contribute to **tensile strength** at the early stages. - Type 1 collagen's eventual predominance is important, but it is **crosslinking** that ultimately determines strength [1]. *Granulation tissue* - Granulation tissue is important for wound healing as it provides a framework for new tissue, but it does not directly correlate with **tensile strength**. - It serves more as a temporary scaffold until collagen remodeling occurs, hence its role in strength is indirect. *Macrophage activity/invasion* - While macrophages are essential for **phagocytosis** and **regulating inflammation**, they do not directly affect the tensile strength of the wound. - Their role is more about initiating the healing process rather than contributing to the **structural integrity** of mature scars. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Inflammation and Repair, pp. 119-121.

Question 966: All of the following are risk factors for inguinal hernia, EXCEPT:

A. Diabetes mellitus (Correct Answer)
B. COPD
C. Family history of inguinal hernia
D. Chronic constipation

Explanation: ***Diabetes mellitus*** - **Diabetes mellitus** is NOT a direct risk factor for inguinal hernia development. - While diabetic patients may have hernias, diabetes itself does not increase intra-abdominal pressure or cause abdominal wall weakness. - The association is incidental rather than causal. *Family history of inguinal hernia* - A positive family history suggests a **genetic predisposition** or inherited weakness of the abdominal wall. - This factor increases the likelihood of developing a hernia due to structural vulnerabilities in the transversalis fascia. *Chronic constipation* - Patients with chronic constipation experience repeated **straining during defecation**. - This chronic increase in **intra-abdominal pressure** can weaken the posterior wall of the inguinal canal over time. *COPD* - Patients with **Chronic Obstructive Pulmonary Disease (COPD)** frequently experience chronic coughing. - This persistent coughing leads to recurrent increases in **intra-abdominal pressure**, which can contribute to the development or worsening of an inguinal hernia.

Question 967: During a surgical procedure, the surgeon is unable to maintain clear visualization of the operative field due to continuous accumulation of blood and tissue debris that obscures the anatomy. What is the most likely cause of this problem?

A. Inadequate lighting in the operating room
B. Arterial bleeding from a major vessel injury
C. Venous congestion at the surgical site
D. Inadequate suctioning leading to blood and debris ejection (Correct Answer)

Explanation: ***Inadequate suctioning leading to blood and debris ejection*** - **Inadequate or ineffective suctioning** is the primary technical cause of poor surgical field visualization when blood and debris accumulate and obscure the operative anatomy - Proper suctioning technique is a **fundamental surgical principle** essential for maintaining hemostasis and clear visualization - When suction is insufficient, blood pools and may be displaced rapidly (appearing to "gush" or "eject") when instruments move through the field - This represents a **correctable technical issue** that should be addressed immediately to restore field visibility *Inadequate lighting in the operating room* - While poor lighting can impair visualization, it would cause **dim or shadowed views** rather than obscuration by blood and debris - Modern operating rooms have standardized lighting systems that are checked before procedures - The scenario describes **material accumulation** (blood/debris), not poor illumination *Arterial bleeding from a major vessel injury* - Major arterial injury would cause **pulsatile, high-pressure hemorrhage** requiring immediate vascular control (pressure, clamping, ligation) - This is a **surgical emergency** requiring multiple interventions beyond suctioning - The question describes continuous accumulation due to inadequate clearing, not acute severe hemorrhage from vessel injury *Venous congestion at the surgical site* - **Venous congestion** causes slow, steady oozing from capillaries and small veins due to elevated venous pressure - While this can impair visualization, it produces **generalized oozing** rather than accumulation of blood and debris - Management includes patient positioning, reducing venous pressure, and topical hemostatic agents rather than just improved suctioning

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

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Minimal Access Surgery Principles

Practice Questions

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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