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Biliopancreatic Diversion Surgery with Duodenal Switch (BPD/DS) 

Bariatric surgery can be done in several ways. This type of bariatric surgery changes the size of your stomach and the length of your small intestine. The goal is to limit how much food can be eaten and absorbed at one time. During this type of procedure, part of the stomach is closed off with staples to create a smaller pouch. The remainder of the stomach is removed. This smaller stomach restricts the amount of food you can eat at one time. The small intestine is then divided, and only a very short length of its lower portion is reattached to the stomach pouch. Because part or most of the small intestine is bypassed, less food is absorbed.

The procedure

Only a very short length of intestine is left that can absorb food. As a result, most of the food that is eaten is expelled as waste and not absorbed as energy. This can lead to nutritional deficiencies. Nearly all people take vitamin supplements to prevent this from happening.

Front view of stomach showing biliopancreatic diversion with duodenal switch. Arrows show path of food and digestive fluids.

Special note: the gallbladder

Bariatric surgery is designed to cause a large amount of weight loss. Weight loss can cause deposits in the gallbladder called gallstones. The gallbladder may be removed during your surgery if you already have gallstones. Or it may need to be removed at a later date if you develop gallstones.

All types of bariatric surgery have different advantages and disadvantages. Be sure to discuss the risks and complications of this surgery with your healthcare provider. 

Online Medical Reviewer: Jonas DeMuro MD
Online Medical Reviewer: Melinda Murray Ratini DO
Online Medical Reviewer: Raymond Kent Turley BSN MSN RN
Date Last Reviewed: 12/1/2022
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