Gastric bypass surgery is a type of weight-loss surgery that involves creating a small pouch from the stomach and connecting it directly to the small intestine. This procedure reduces the amount of food the stomach can hold, and limits the amount of calories and nutrients the body can absorb.
Gastric bypass surgery refers to a technique in which the stomach is divided into a small upper pouch and a much larger lower "remnant" pouch, where the small intestine is rearranged to connect to both. Surgeons have developed several different ways to reconnect the intestine, thus leading to several different gastric bypass procedures (GBP). Any GBP leads to a marked reduction in the functional volume of the stomach, accompanied by an altered physiological and physical response to food.