Bariatric surgery (weight loss surgery) includes a variety of procedures performed on people who have obesity. Weight loss is achieved by reducing the size of the stomach with a gastric band or through removal of a portion of the stomach (sleeve gastrectomy or biliopancreatic diversion with duodenal switch) or by resecting and re-routing the small intestine to a small stomach pouch (gastric bypass surgery).
Your surgeon will perform bariatric surgery if your weight loss efforts through lifestyle changes and medications have been unsuccessful. There are two types of bariatric surgery. Restrictive procedures decrease the size of the stomach so a person feels full quickly. After surgery, the stomach holds about one cup of food. A normal stomach holds 4 to 6 cups. Malabsorptive procedures decrease the absorption of calories in the small intestine. Before your procedure, an intravenous line will be started. Bariatric surgery requires general anesthesia, which puts you to sleep for the duration of the procedure.