Weight Loss Surgery Weight Loss Surgery 3 — Questions and Answers
Question 1: Which bariatric procedure has the highest risk of protein malnutrition due to its significant malabsorptive component?
- Adjustable gastric band
- Sleeve gastrectomy
- Roux-en-Y gastric bypass
- Biliopancreatic diversion with duodenal switch (Correct answer)
Correct answer: Biliopancreatic diversion with duodenal switch
The BPD/DS bypasses the majority of the small intestine, resulting in the greatest degree of malabsorption including protein.
Question 2: What is the primary purpose of the pre-operative liquid diet (typically 2-4 weeks) prescribed before bariatric surgery?
- To shrink the liver and reduce surgical risk (Correct answer)
- To pre-condition the intestines for bypass
- To achieve target BMI before surgery
- To eliminate gallstones
Correct answer: To shrink the liver and reduce surgical risk
The liver-shrinking diet reduces hepatic fat and size, improving laparoscopic access and reducing operative complications.
Question 3: A patient after gastric bypass is prescribed NSAIDs for arthritis. Why is this concerning?
- NSAIDs accelerate weight regain after bypass
- NSAIDs cause marginal ulcers at the gastrojejunostomy anastomosis (Correct answer)
- NSAIDs are rapidly excreted and become ineffective
- NSAIDs cause iron malabsorption in bypass patients
Correct answer: NSAIDs cause marginal ulcers at the gastrojejunostomy anastomosis
NSAIDs significantly increase the risk of marginal ulcers at the connection between the gastric pouch and jejunum after bypass.
Question 4: What is 'metabolic surgery' in the context of bariatric procedures?
- Surgery performed primarily for cosmetic weight reduction
- Bariatric surgery performed to treat obesity-related metabolic diseases like type 2 diabetes (Correct answer)
- A non-invasive procedure using metabolic boosters
- Surgery targeting the thyroid to correct metabolic rate
Correct answer: Bariatric surgery performed to treat obesity-related metabolic diseases like type 2 diabetes
Metabolic surgery refers to bariatric procedures used specifically to treat type 2 diabetes and other metabolic conditions, sometimes in patients with lower BMI.
Question 5: Which lab value is MOST important to monitor regularly after Roux-en-Y gastric bypass to detect anemia?
- Serum calcium
- Ferritin and iron studies (Correct answer)
- Vitamin D level
- Albumin
Correct answer: Ferritin and iron studies
Iron deficiency anemia is highly prevalent after gastric bypass due to reduced gastric acid and bypassed duodenum where iron is absorbed.
Question 6: What psychological condition must typically be evaluated and addressed before bariatric surgery approval?
- Social anxiety disorder
- Binge eating disorder (Correct answer)
- Attention deficit disorder
- Seasonal affective disorder
Correct answer: Binge eating disorder
Binge eating disorder must be identified and treated pre-operatively as it significantly impacts surgical outcomes and can continue post-surgery.
Question 7: How does Roux-en-Y gastric bypass typically achieve type 2 diabetes remission even before significant weight loss occurs?
- By increasing insulin secretion from the pancreas directly
- By improving incretin hormone signaling from the foregut bypass and hindgut stimulation (Correct answer)
- By eliminating carbohydrate absorption entirely
- By reducing cortisol levels postoperatively
Correct answer: By improving incretin hormone signaling from the foregut bypass and hindgut stimulation
Bypassing the duodenum alters foregut signaling and enhances GLP-1 release from the hindgut, improving insulin sensitivity rapidly.
Weight Loss Surgery Weight Loss Surgery 3
Which bariatric procedure has the highest risk of protein malnutrition due to its significant malabsorptive component?