Roux-en-Y Gastric Bypass
Gastric bypass surgery makes the stomach smaller, essentially decreasing the size of the stomach from the size of a football down to a golf ball sized pouch, and allows food to bypass part of the small intestine. You will feel full more quickly than when your stomach was its original size, which reduces the amount of food you eat and thus the calories consumed. Bypassing part of the intestine also results in fewer calories being absorbed. All of this leads to weight loss.
This procedure can be done by making a large incision in the abdomen (an open procedure) or by making several small incisions and using small instruments and a camera to perform the surgery (laparoscopic approach).
The most common gastric bypass surgery is a Roux-en-Y gastric bypass.
In normal digestion, food passes through the stomach and enters the small intestine, where most of the nutrients and calories are absorbed. It then passes into the large intestine (colon), and the remaining waste is eventually excreted.
In a Roux-en-Y gastric bypass surgery, the stomach is made smaller by creating a small pouch at the top of the stomach using surgical staples or a plastic band. The smaller stomach is connected directly to the middle portion of the small intestine (jejunum), bypassing the rest of the stomach and the upper portion of the small intestine (duodenum).