A somewhat less extreme version is biliopancreatic diversion with a duodenal switch, or “the duodenal switch.” It's still more involved than a gastric bypass, but this procedure removes less of the stomach and bypasses less of the small intestinethan biliopancreatic diversion without the switch.
Gastric banding is considered the least invasive weight loss surgery and also the safest. The procedure can be reversed if necessary, and in time, the stomach generally returns to its normal size. The procedure can be reversed if necessary, and in time, the stomach generally returns to its normal size.
Roux-en-Y gastric bypass (RYGB) is a type of weight-loss surgery. Weight-loss surgery is also called bariatric surgery. It’s often done as a laparoscopic surgery, with small incisions in the abdomen.