Weight Loss Surgery Surgical Procedures and Techniques 1 — Questions and Answers
Question 1: Which bariatric procedure involves placing an adjustable silicone band around the upper portion of the stomach?
- Sleeve gastrectomy
- Roux-en-Y gastric bypass
- Adjustable gastric banding (Correct answer)
- Biliopancreatic diversion
Correct answer: Adjustable gastric banding
Adjustable gastric banding (e.g., Lap-Band) places a silicone band around the upper stomach to create a small pouch and narrow outlet.
Question 2: In a Roux-en-Y gastric bypass, approximately what percentage of the stomach is used to create the new pouch?
- 50%
- 25%
- 10%
- Less than 5% (Correct answer)
Correct answer: Less than 5%
The gastric pouch created in RYGB is very small, typically 15–30 mL (less than 5% of the original stomach volume).
Question 3: What does the term 'malabsorptive' mean in the context of bariatric surgery?
- The surgery reduces hunger hormones
- The surgery causes nausea when eating certain foods
- The surgery reduces the length of intestine available for nutrient absorption (Correct answer)
- The surgery increases metabolic rate
Correct answer: The surgery reduces the length of intestine available for nutrient absorption
Malabsorptive procedures like gastric bypass or BPD reroute the intestines to reduce the amount of nutrients and calories absorbed.
Question 4: Which bariatric procedure has the highest rate of weight loss but also the highest risk of nutritional deficiencies?
- Adjustable gastric banding
- Sleeve gastrectomy
- Roux-en-Y gastric bypass
- Biliopancreatic diversion with duodenal switch (Correct answer)
Correct answer: Biliopancreatic diversion with duodenal switch
BPD-DS produces the greatest weight loss of all bariatric procedures but carries the highest risk of severe nutritional deficiencies due to extensive malabsorption.
Question 5: What is the primary mechanism by which sleeve gastrectomy causes weight loss?
- Malabsorption of nutrients
- Restriction of food intake and reduction of ghrelin-producing cells (Correct answer)
- Increased metabolic rate
- Dumping syndrome discouraging high-calorie foods
Correct answer: Restriction of food intake and reduction of ghrelin-producing cells
Sleeve gastrectomy restricts intake by reducing stomach size and also lowers ghrelin levels by removing the fundus, reducing hunger.
Question 6: Which imaging study is typically performed before bariatric surgery to evaluate the esophagus, stomach, and small bowel?
- CT scan of abdomen
- Upper GI series (barium swallow) (Correct answer)
- Abdominal MRI
- Colonoscopy
Correct answer: Upper GI series (barium swallow)
An upper GI series evaluates the esophagus, stomach anatomy, and ruling out hiatal hernia or other abnormalities before bariatric surgery.
Weight Loss Surgery Surgical Procedures and Techniques 1
Which bariatric procedure involves placing an adjustable silicone band around the upper portion of the stomach?