Gastric Bypass Surgery, also known as Roux-en-Y gastric bypass, is a weight-loss surgery that involves creating a smaller stomach pouch and rearranging the small intestine to facilitate weight loss. This procedure is both restrictive and malabsorptive, meaning it reduces the amount of food the stomach can hold and alters the absorption of nutrients in the digestive tract.

Here's an overview of the gastric bypass procedure:

Stomach Reduction: The surgeon creates a small stomach pouch at the top of the stomach using staples or sutures. This reduces the stomach's capacity, limiting the amount of food it can hold.

Bypassing the Small Intestine: The surgeon then reroutes a segment of the small intestine, connecting the newly created stomach pouch directly to the lower part of the small intestine. This bypasses a portion of the stomach and the upper part of the small intestine, altering the normal digestive process.