Biliopancreatic diversion with duodenal switch (also known simply as duodenal switch or BPD-DS) is a bariatric surgery that combines a gastric sleeve procedure with a rearrangement of the small intestine to both limit the amount of food required to feel full and limit the amount of calories the body can absorb. The combination of restrictive and malabsorptive elements allows patients to experience more dramatic weight loss than gastric sleeve surgery or gastric bypass surgery alone.
During duodenal switch surgery, the surgeon will begin by converting the stomach into a gastric sleeve, removing about 70 percent of the stomach tissue and reshaping the stomach into a smaller, tube-like structure. Then, the surgeon will rearrange the small intestine so that food does not encounter bile and pancreatic digestive juices until it enters the colon, which limits the amount of calories the body absorbs from food.
BPD-DS can be completed as a traditional, open surgery, or using advanced laparoscopic methods.