The gastric sleeve procedure, also known as a sleeve gastrectomy, is a surgery that decreases the size of the stomach to encourage weight loss. About 80%=- of the stomach is surgically removed, leaving a tube-like portion of the stomach in place, and removing the rest permanently. The remaining stomach can initially hold about 4 ounces or 120 milliliters, a significant decrease from the normal size of the stomach.
This dramatic decrease in stomach size means the individual can only eat about half a cup at a time and restricts the volume of food that can be eaten, which in turn decreases the calories that can be taken in, leading to weight loss.
Despite the decrease in stomach size, surgery is a tool and still requires the individual to follow discharge instructions, limit food intake, and follow the plan provided by the surgeon. It is possible to overeat and have minimal weight loss after surgery. It is also possible to have a serious complication after surgery, so the procedure must be taken seriously, like any surgery.