Name the three common bariatric procedures and state how each achieves weight loss.

Name the three common bariatric procedures and state how each achieves weight loss.

• A. Sleeve gastrectomy (restrictive), Roux-en-Y gastric bypass (restrictive + malabsorptive), adjustable gastric band (restrictive)
• B. Sleeve gastrectomy (restrictive), Roux-en-Y gastric bypass (malabsorptive), adjustable gastric band (restrictive)
• C. Sleeve gastrectomy (malabsorptive), Roux-en-Y gastric bypass (restrictive), adjustable gastric band (restrictive)
• D. Sleeve gastrectomy (restrictive + malabsorptive), Roux-en-Y gastric bypass (restrictive), adjustable gastric band (restrictive)

Answer: (A)

Weight loss from bariatric procedures mainly comes from how the surgery changes stomach size and nutrient absorption. A restrictive approach reduces how much you can eat by making the stomach smaller; a malabsorptive approach changes how nutrients are absorbed by bypassing portions of the small intestine; some procedures use a combination of both. Sleeve gastrectomy creates a small, tube-like stomach by removing a large portion of the stomach. This primarily reduces volume, so you feel full sooner and eat less. It can have hormonal effects, but the main mechanism is restriction. Roux-en-Y gastric bypass forms a small stomach pouch and reroutes the intestines to bypass the duodenum and part of the jejunum. This provides both restriction and malabsorption, since food bypasses a portion of the small intestine and fewer calories and nutrients are absorbed. Adjustable gastric band places an adjustable band around the upper stomach to create a small pouch and slow emptying. This is purely restrictive, with no intentional change to how the intestines absorb nutrients. The described mechanisms match the correct option: sleeve gastrectomy is restrictive, Roux-en-Y gastric bypass is restrictive plus malabsorptive, and adjustable gastric band is restrictive.

Weight loss from bariatric procedures mainly comes from how the surgery changes stomach size and nutrient absorption. A restrictive approach reduces how much you can eat by making the stomach smaller; a malabsorptive approach changes how nutrients are absorbed by bypassing portions of the small intestine; some procedures use a combination of both.

Sleeve gastrectomy creates a small, tube-like stomach by removing a large portion of the stomach. This primarily reduces volume, so you feel full sooner and eat less. It can have hormonal effects, but the main mechanism is restriction.

Roux-en-Y gastric bypass forms a small stomach pouch and reroutes the intestines to bypass the duodenum and part of the jejunum. This provides both restriction and malabsorption, since food bypasses a portion of the small intestine and fewer calories and nutrients are absorbed.

Adjustable gastric band places an adjustable band around the upper stomach to create a small pouch and slow emptying. This is purely restrictive, with no intentional change to how the intestines absorb nutrients.

The described mechanisms match the correct option: sleeve gastrectomy is restrictive, Roux-en-Y gastric bypass is restrictive plus malabsorptive, and adjustable gastric band is restrictive.