Bariatric Surgery — MCQs

A 65-year-old woman with morbid obesity (BMI 45) and multiple comorbidities requests bariatric surgery. She has diabetes, hypertension, sleep apnea, and depression. Her insurance requires 6-month supervised weight loss, but she has failed multiple diet attempts. She threatens self-harm if denied surgery. Evaluate the approach to her care.

Q68

A 50-year-old male with a BMI of 38 is scheduled for Roux-en-Y gastric bypass surgery. What preoperative evaluations are essential to optimize surgical outcomes and minimize postoperative complications?

Q69

What is the most commonly performed and acceptable method of bariatric surgery?

Q70

A patient who underwent sleeve gastrectomy on the 3rd postoperative day complains of fever. On examination, the patient is febrile, with a pulse rate of 110 beats per minute. The complete blood count shows leucocytosis. What is the next best step in managing this patient?

Bariatric Surgery Indian Medical PG Practice Questions and MCQs

Question 61: Which one of the following is the most important selection criteria for obesity surgery?

A. BMI 35 without any co-morbid disease
B. BMI > 40 (Correct Answer)
C. BMI 30 with co-morbid disease
D. BMI 30

Explanation: ***BMI > 40*** - A **Body Mass Index (BMI) greater than 40 kg/m²** is generally the primary and most significant criterion for considering obesity surgery. - This category of obesity, often referred to as **morbid obesity**, carries severe health risks that surgery is deemed necessary to mitigate. *BMI 35 without any co-morbid disease* - While a **BMI of 35 kg/m²** is considered severe obesity, standing alone without significant comorbidities, it is not typically the strongest indication for bariatric surgery. - Surgery is usually recommended for this group if there are also **obesity-related comorbidities** like diabetes or hypertension. *BMI 30 with co-morbid disease* - A **BMI of 30 kg/m²** falls into the category of obesity class I, and while comorbidities are present, bariatric surgery is generally not recommended at this stage. - Lifestyle interventions, medication, and non-surgical approaches are typically tried first for individuals with a BMI of 30, even with comorbidities. *BMI 30* - A **BMI of 30 kg/m²** without any mention of comorbidities is considered obesity class I. - This level is usually managed through lifestyle modifications, diet, exercise, and sometimes pharmacotherapy, rather than surgical intervention.

Question 62: In postoperative care the long term risks after Bariatric Surgery include all EXCEPT:

A. Vitamin and Micronutrient depletion syndromes
B. Weight regain
C. Deep Vein Thrombosis (Correct Answer)
D. Protein Calorie Malnutrition

Explanation: ***Deep Vein Thrombosis*** - Deep Vein Thrombosis (DVT) is a significant **short-term (early) complication** of bariatric surgery, primarily in the **immediate postoperative period**, due to immobility and hypercoagulability. - While prophylaxis is crucial, DVT is not typically considered a **long-term risk** that persists for years after surgery. *Vitamin and Micronutrient depletion syndromes* - Bariatric surgery procedures, especially those involving malabsorption (e.g., Roux-en-Y gastric bypass), can lead to chronic deficiencies in **fat-soluble vitamins (A, D, E, K)**, **B12**, **iron**, and **calcium** due to altered absorption. - These depletion syndromes are a well-documented **long-term risk** requiring lifelong supplementation and monitoring. *Weight regain* - Despite initial significant weight loss, a substantial number of patients experience some degree of **weight regain** in the long term, typically peaking 2-5 years post-surgery. - This is a common and critical **long-term risk** that often necessitates ongoing lifestyle modifications and monitoring. *Protein Calorie Malnutrition* - Certain bariatric procedures (e.g., biliopancreatic diversion with duodenal switch) can lead to severe **malabsorption of protein and calories**, resulting in protein-calorie malnutrition (PCM). - PCM is a serious and persistent **long-term risk** that requires careful dietary management and sometimes additional medical interventions.

Question 63: Pre-operative Nutrition Screening in a patient with morbid obesity planned for Gastric Bypass includes all EXCEPT:

A. Serum Insulin (Correct Answer)
B. Serum Vitamin B12
C. Serum Calcium
D. Serum Magnesium

Explanation: ***Serum Insulin*** - While relevant to **diabetes** and metabolic health, routine **pre-operative insulin screening** is not standard for gastric bypass. - Nutritional screening focuses on identifying and correcting deficiencies that could complicate surgery or post-operative recovery. *Serum Vitamin B12* - Patients undergoing **gastric bypass** are at high risk for **Vitamin B12 deficiency** due to altered absorption in the bypassed stomach and small intestine. - Pre-operative screening is essential to identify and replete deficiencies to prevent post-operative neurological complications. *Serum Calcium* - **Malabsorption of calcium** is a known risk after gastric bypass due to changes in the digestive tract. - Pre-operative **calcium levels** are crucial for bone health assessment and to guide supplementation strategies. *Serum Magnesium* - **Magnesium deficiency** can occur post-gastric bypass due to malabsorption. - Pre-operative screening helps to identify existing deficiencies, which can impact cardiac function and neuromuscular health.

Question 64: Sleeve Gastrectomy done for Morbid obesity is a:

A. Restrictive procedure (Correct Answer)
B. Mildly restrictive and mainly malabsorptive
C. Reversible procedure
D. Malabsorptive procedure only

Explanation: ***Restrictive procedure (Correct Answer)*** - A **sleeve gastrectomy** involves removing a large portion of the stomach (approximately 75-80%), leaving a banana-shaped "sleeve," which significantly **reduces stomach volume**. - This reduction in volume **restricts** the amount of food a patient can consume at one time, leading to early satiety and weight loss. - It is classified as a **purely restrictive** bariatric procedure. *Mildly restrictive and mainly malabsorptive* - While there is some malabsorption due to faster gastric emptying, the primary mechanism of weight loss in sleeve gastrectomy is **restriction**, not malabsorption. - Procedures like **Roux-en-Y gastric bypass** are considered both restrictive and malabsorptive. *Reversible procedure* - Sleeve gastrectomy involves the **irreversible removal** of a significant part of the stomach. - Unlike devices like the **adjustable gastric band**, it cannot be undone or reversed. *Malabsorptive procedure only* - Sleeve gastrectomy does not significantly alter the **intestinal tract** to cause malabsorption. - Procedures that are primarily **malabsorptive**, such as **biliopancreatic diversion with duodenal switch**, involve bypassing large sections of the small intestine.

Question 65: A 50-year old lady underwent uneventful bariatric surgery for morbid obesity. On the third post operative day, she develops breathlessness and pulmonary embolism is suspected. The next investigation to confirm the diagnosis will be:

A. MR angiography
B. Echocardiography
C. Duplex venography
D. CT pulmonary angiography (Correct Answer)

Explanation: ***CT pulmonary angiography*** - **CT pulmonary angiography (CTPA)** is the **gold standard** for diagnosing pulmonary embolism due to its high sensitivity and specificity in visualizing pulmonary arteries. - It rapidly provides detailed images of the pulmonary vasculature, allowing for the direct visualization of **thrombi** within the vessels. *MR angiography* - **MR angiography (MRA)** can be used for diagnosing pulmonary embolism but is generally less available and often takes longer than CTPA. - It is usually reserved for patients with contraindications to CT, such as **renal impairment** or **iodine allergy**, which are not indicated in this case. *Echocardiography* - **Echocardiography** can help assess the **right ventricular strain** caused by pulmonary embolism, but it is not diagnostic for the embolism itself. - It is more useful in evaluating the **hemodynamic impact** of the PE and ruling out other cardiac causes of breathlessness. *Duplex venography* - **Duplex venography** (or ultrasound of the lower extremities) is used to detect **deep vein thrombosis (DVT)** in the legs. - While DVT is a common cause of pulmonary embolism, this investigation does not directly visualize the embolism in the **pulmonary arteries**.

Question 66: A 45-year-old woman undergoes bariatric surgery (Roux-en-Y gastric bypass). Six months later, she presents with weakness, fatigue, and macrocytic anemia. Her hemoglobin is 8.5 g/dL, MCV is 110 fL, and serum B12 is low. What is the most likely explanation for these findings?

A. Folate deficiency from dietary restrictions
B. Protein malnutrition from small pouch
C. Vitamin B12 deficiency from bypassed duodenum (Correct Answer)
D. Chronic blood loss from anastomotic ulcers

Explanation: ***Vitamin B12 deficiency from bypassed duodenum*** - **Roux-en-Y gastric bypass** alters the normal digestive pathway, **bypassing the duodenum** and a significant portion of the jejunum. - **Intrinsic factor**, essential for **Vitamin B12 absorption**, is secreted in the stomach but needs to bind with B12 in the duodenum/distal ileum. The bypass makes this interaction and subsequent absorption difficult, leading to **macrocytic anemia** and **low serum B12**. *Folate deficiency from dietary restrictions* - While **folate deficiency** can cause **macrocytic anemia**, it typically results from inadequate intake or malabsorption in the jejunum. - The primary issue here is the **specific deficit in B12 absorption**, indicated by low serum B12, rather than a general nutrient deficiency. *Protein malnutrition from small pouch* - **Protein malnutrition** can lead to generalized weakness, fatigue, and muscle wasting, but it does not directly cause **macrocytic anemia** with **low Vitamin B12**. - Anemia in protein malnutrition is more often **normocytic** or due to co-existing iron deficiency. *Chronic blood loss from anastomotic ulcers* - **Chronic blood loss** from **anastomotic ulcers** would typically result in **microcytic hypochromic anemia** due to **iron deficiency**, rather than the macrocytic anemia observed. - The hemoglobin level of 8.5 g/dL could indicate blood loss, but the high MCV points away from this as the primary cause of the anemia.

Question 67: A 65-year-old woman with morbid obesity (BMI 45) and multiple comorbidities requests bariatric surgery. She has diabetes, hypertension, sleep apnea, and depression. Her insurance requires 6-month supervised weight loss, but she has failed multiple diet attempts. She threatens self-harm if denied surgery. Evaluate the approach to her care.

A. Immediate bariatric surgery due to suicide risk
B. Emergency psychiatric consultation
C. Multidisciplinary bariatric team evaluation (Correct Answer)
D. Psychiatric evaluation and treatment before surgery consideration

Explanation: ***Multidisciplinary bariatric team evaluation*** - A **multidisciplinary team** (including surgeons, dietitians, psychologists, and internists) is crucial for a comprehensive assessment, addressing both the patient's physical and psychological health, and ensuring an appropriate and safe surgical plan. - This approach allows for the evaluation of the patient's **comorbidities**, **mental health**, readiness for surgery, and development of a supportive long-term care plan, which is especially important given her mental health concerns and complex medical history. - The team can coordinate **psychiatric evaluation** alongside medical optimization, allowing for parallel assessment rather than sequential delays. *Immediate bariatric surgery due to suicide risk* - Performing bariatric surgery without a comprehensive evaluation can be **unsafe** due to her multiple comorbidities and the potential for exacerbating psychiatric issues post-surgery if not properly addressed. - While **self-harm threats** are serious and require immediate attention, they do not automatically necessitate immediate surgery without a proper risk-benefit analysis and addressing the underlying psychological distress. - Surgery under duress or without proper preparation carries significant risks of poor outcomes and may not address the underlying mental health crisis. *Emergency psychiatric consultation* - While an **emergency psychiatric consultation** is warranted given the self-harm threat, it is an initial step but not the sole approach to her overall care in the context of bariatric surgery. - This consultation would address the immediate **safety concerns** but would need to be integrated into a broader multidisciplinary evaluation for surgical candidacy. - A single psychiatric consultation alone does not provide the comprehensive medical, nutritional, and surgical assessment needed for bariatric surgery candidacy. *Psychiatric evaluation and treatment before surgery consideration* - A **psychiatric evaluation and treatment** are indeed necessary; however, completely delaying surgery consideration until treatment is concluded might be overly restrictive, especially if the patient is motivated. - A multidisciplinary approach allows for parallel work-up, where psychiatric treatment can begin while other aspects of bariatric candidacy are also being assessed, optimizing the timeline and overall care plan. - This sequential approach may unnecessarily delay appropriate surgical intervention and could worsen the patient's sense of hopelessness.

Question 68: A 50-year-old male with a BMI of 38 is scheduled for Roux-en-Y gastric bypass surgery. What preoperative evaluations are essential to optimize surgical outcomes and minimize postoperative complications?

A. Nutritional assessment, psychological evaluation, and management of comorbid conditions (Correct Answer)
B. Routine blood tests only
C. Immediate surgery without further evaluation
D. Focusing solely on an exercise regimen

Explanation: ***Nutritional assessment, psychological evaluation, and management of comorbid conditions*** - A **comprehensive nutritional assessment** identifies deficiencies that need correction preoperatively to prevent complications and optimize healing. - A **psychological evaluation** screens for mental health issues, assesses adherence potential, and ensures the patient has realistic expectations and coping strategies for the significant lifestyle changes post-surgery. - **Management of comorbid conditions** like diabetes, hypertension, and sleep apnea is crucial to reduce surgical risks and improve overall health outcomes. *Routine blood tests only* - While essential, **routine blood tests alone are insufficient** to identify all potential risks and optimize a patient for complex bariatric surgery. - This approach overlooks crucial aspects like mental health, nutritional deficiencies, and poorly controlled chronic diseases. *Immediate surgery without further evaluation* - **Performing bariatric surgery without thorough preoperative evaluation** significantly increases the risk of complications, including surgical, nutritional, and psychological issues. - Comprehensive assessment is a cornerstone of safe and effective bariatric care, mandated by clinical guidelines. *Focusing solely on an exercise regimen* - An **exercise regimen is important for overall health** and can aid in weight loss, but it is not sufficient as the *sole* preoperative evaluation. - It neglects crucial medical, nutritional, and psychological factors specific to bariatric surgery patient preparation.

Question 69: What is the most commonly performed and acceptable method of bariatric surgery?

A. Biliopancreatic diversion
B. Laparoscopic sleeve gastrectomy (Correct Answer)
C. Laparoscopic gastric banding
D. Roux-en-Y gastric bypass

Explanation: ***Laparoscopic sleeve gastrectomy (LSG)*** - **Laparoscopic sleeve gastrectomy** is currently the **most commonly performed** bariatric surgery worldwide, accounting for approximately **60% of all bariatric procedures** globally. - The procedure involves removing approximately **80% of the stomach** along the greater curvature, creating a tubular "sleeve" that restricts food intake and reduces hunger hormone (ghrelin) production. - LSG has gained popularity due to its **technical simplicity**, **lower complication rates** compared to RYGB, **absence of foreign body** (unlike gastric banding), and **effective weight loss** with good resolution of comorbidities. - It is the **most commonly performed bariatric procedure in India** and has become the preferred first-line surgical option for most patients. *Roux-en-Y gastric bypass* - **Roux-en-Y gastric bypass (RYGB)** was historically the gold standard and most common bariatric procedure but has been **surpassed by sleeve gastrectomy** since approximately 2014-2015. - RYGB now accounts for approximately **15-20% of bariatric procedures** worldwide. - It remains an excellent option, particularly for patients with **severe GERD** or **super obesity**, and involves creating a small gastric pouch with intestinal rerouting. *Biliopancreatic diversion* - **Biliopancreatic diversion (BPD)** is a highly effective procedure for weight loss but carries a higher risk of **nutritional deficiencies** due to extensive malabsorption. - It is generally reserved for patients with **severe or super obesity** and represents a small percentage of bariatric procedures due to complexity and metabolic risks. *Laparoscopic gastric banding* - **Laparoscopic adjustable gastric banding (LAGB)** was once popular but has **significantly declined** due to **poorer long-term weight loss outcomes** and higher rates of reoperations. - It involves placing an inflatable band around the upper stomach, which can lead to complications such as **band slippage**, **erosion**, and **port-related issues**. - LAGB now represents **less than 5%** of bariatric procedures worldwide.

Question 70: A patient who underwent sleeve gastrectomy on the 3rd postoperative day complains of fever. On examination, the patient is febrile, with a pulse rate of 110 beats per minute. The complete blood count shows leucocytosis. What is the next best step in managing this patient?

A. Re-exploration
B. Broad spectrum antibiotics
C. Abdominal USG to locate the septic focus
D. CECT abdomen (Correct Answer)

Explanation: ***CECT abdomen*** - A **computed tomography (CT) scan** with contrast is the most sensitive and specific imaging modality to detect potential complications like a **leak, abscess**, or other **intra-abdominal pathology** following sleeve gastrectomy. - Given the patient's fever, tachycardia, and leukocytosis on the 3rd postoperative day, there is a strong suspicion of **sepsis** requiring prompt investigation to identify the source. *Broad spectrum antibiotics* - While antibiotics are important in managing potential infection, they are not the *next best step* without identifying the **source of infection**, as this patient is critically ill. - Starting antibiotics empirically without imaging could delay diagnosis of a surgically treatable complication like a **leak** or **abscess**. *Abdominal USG to locate the septic focus* - Abdominal ultrasound has **limited sensitivity** for detecting small leaks or deep-seated collections, especially in obese patients or with overlying bowel gas. - A **CT scan** provides superior anatomical detail and penetration compared to ultrasound for evaluating the surgical site. *Re-exploration* - **Re-exploration is a surgical intervention** and should only be considered after a definitive diagnosis, preferably guided by imaging like a **CECT abdomen**, indicating a need for surgical repair or drainage. - Performing re-exploration without imaging guidance could be an unnecessary and potentially harmful procedure if the diagnosis is incorrect or manageable non-surgically.

Practice by Chapter

Pathophysiology of Obesity

Practice Questions

Patient Selection and Preoperative Evaluation

Practice Questions

Restrictive Procedures

Practice Questions

Malabsorptive Procedures

Practice Questions

Sleeve Gastrectomy

Practice Questions

Roux-en-Y Gastric Bypass

Practice Questions

Biliopancreatic Diversion

Practice Questions

Adjustable Gastric Banding

Practice Questions

Revisional Bariatric Surgery

Practice Questions

Postoperative Management

Practice Questions

Nutritional Considerations

Practice Questions

Metabolic Effects of Bariatric Surgery

Practice Questions

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