Duodenal switch
weight-loss surgery
The duodenal switch (DS) procedure, also known as a gastric reduction duodenal switch (GRDS), is a weight loss surgery procedure that is composed of a restrictive and a malabsorptive aspect.
The restrictive portion of the surgery involves removing approximately 70% of the stomach (along the greater curvature) and most of the duodenum.
The malabsorptive portion of the surgery reroutes a lengthy portion of the small intestine, creating two separate pathways and one common channel. The shorter of the two pathways, the digestive loop, takes food from the stomach to the common channel. The much longer pathway, the biliopancreatic loop, carries bile from the liver to the common channel.
The common channel is the portion of small intestine, usually 75-150 centimeters long, in which the contents of the digestive path mix with the bile from the biliopancreatic loop before emptying into the large intestine. The objective of this arrangement is to reduce the amount of time the body has to capture calories from food in the small intestine and to selectively limit the absorption of fat. As a result, following surgery, these patients absorb only approximately 20% of the fat they consume.
Comparison to other surgeries
Advantages
The primary advantage of duodenal switch (DS) surgery is that its combination of moderate intake restriction with substantial calorie malabsorption results in a higher percentage of excess weight loss than a purely restrictive gastric bypass for all individuals. In a systemic metaanalysis of the weight loss surgical procedures (Buckwald et al.)
Type 2 diabetics have had a 98% "cure" (i.e.
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This entry incorporates text from “Duodenal switch” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.