Bariatric Surgery Practice Questions

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

Serum Insulin. ***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.

Q: Sleeve Gastrectomy done for Morbid obesity is a:

Restrictive procedure. ***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.

Q: 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?

Vitamin B12 deficiency from bypassed duodenum. ***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.

Q: 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?

CECT abdomen. ***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.

Q: All of the following are primarily restrictive operations for morbid obesity, except which of the following?

Roux-en-Y operation. **Roux-en-Y operation** - The **Roux-en-Y gastric bypass** is considered a **malabsorptive as well as a restrictive procedure** because it creates a small gastric pouch and bypasses a significant portion of the small intestine. - This dual mechanism leads to greater weight loss compared to purely restrictive surgeries. *Vertical band gastroplasty* - **Vertical band gastroplasty** is a **purely restrictive procedure** that creates a small pouch and restricts outflow, but does not involve nutrient malabsorption. - It is less commonly performed now due to higher rates of weight regain and complications compared to other bariatric surgeries. *Laparoscopic adjustable gastric banding* - **Laparoscopic adjustable gastric banding** is a **purely restrictive procedure** where an inflatable band is placed around the upper part of the stomach to create a small pouch. - This limits the amount of food that can be consumed at one time and slows gastric emptying, but does not alter nutrient absorption. *Switch duodenal operation* - The **duodenal switch operation** (biliopancreatic diversion with duodenal switch) is primarily a **malabsorptive procedure** with a restrictive component. - While it includes creation of a small gastric pouch, its most significant effect on weight loss comes from bypassing a large portion of the small intestine, leading to **significant malabsorption**.

Question 1

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

Accepted Answer

Serum Insulin

Answer

Serum Vitamin B12

Answer

Serum Calcium

Answer

Serum Magnesium

Question 2

Sleeve Gastrectomy done for Morbid obesity is a:

Accepted Answer

Restrictive procedure

Answer

Mildly restrictive and mainly malabsorptive

Answer

Reversible procedure

Answer

Malabsorptive procedure only

Question 3

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?

Accepted Answer

Vitamin B12 deficiency from bypassed duodenum

Answer

Folate deficiency from dietary restrictions

Answer

Protein malnutrition from small pouch

Answer

Chronic blood loss from anastomotic ulcers

Question 4

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.

Accepted Answer

Multidisciplinary bariatric team evaluation

Answer

Immediate bariatric surgery due to suicide risk

Answer

Emergency psychiatric consultation

Answer

Psychiatric evaluation and treatment before surgery consideration

Question 5

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?

Accepted Answer

Nutritional assessment, psychological evaluation, and management of comorbid conditions

Answer

Routine blood tests only

Answer

Immediate surgery without further evaluation

Answer

Focusing solely on an exercise regimen

Question 6

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

Accepted Answer

Laparoscopic sleeve gastrectomy

Answer

Biliopancreatic diversion

Answer

Laparoscopic gastric banding

Answer

Roux-en-Y gastric bypass

Question 7

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?

Accepted Answer

CECT abdomen

Answer

Re-exploration

Answer

Broad spectrum antibiotics

Answer

Abdominal USG to locate the septic focus

Question 8

All of the following are primarily restrictive operations for morbid obesity, except which of the following?

Accepted Answer

Roux-en-Y operation

Answer

Laparoscopic adjustable gastric banding

Answer

Vertical band gastroplasty

Answer

Duodenal switch operation

Bariatric Surgery — MCQs

Bariatric Surgery — MCQs

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