Bariatric Surgery Practice Questions

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

BMI > 40. ***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.

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

Deep Vein Thrombosis. ***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.

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 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:

CT pulmonary angiography. ***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**.

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.

Question 1

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

Accepted Answer

BMI > 40

Answer

BMI 35 without any co-morbid disease

Answer

BMI 30 with co-morbid disease

Answer

BMI 30

Question 2

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

Accepted Answer

Deep Vein Thrombosis

Answer

Vitamin and Micronutrient depletion syndromes

Answer

Weight regain

Answer

Protein Calorie Malnutrition

Question 3

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 4

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 5

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:

Accepted Answer

CT pulmonary angiography

Answer

MR angiography

Answer

Echocardiography

Answer

Duplex venography

Question 6

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 7

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 8

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 9

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 10

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

Bariatric Surgery — MCQs

Bariatric Surgery — MCQs

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