What is the Duodenal Switch?

The Duodenal Switch (also called DS, BPD-DS, Biliopancreatic Diversion-Duodenal Switch) is a weight-loss procedure that brings together two types of bariatric procedures—restriction and malabsorption.

This procedure is taken in two steps, first the stomach is restricted to limit the amount of food you can ingest (like the sleeve). The second step hinders absorption by creating a partial loop bypass which leads to malabsorption to limit the body’s caloric intake. (like gastric bypass).

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Benefits of Duodenal Switch Advantages

One of the advantages of the Duodenal Switch is that it leaves the valve at the bottom of the stomach (the pylorus). This both minimizes dumping and lengthens the amount of time food stays in the stomach, which gives a longer feeling of fullness. Another advantage of DS is that the type of bypass performed (duodenum to ileum), limits the amount of fat that is absorbed from your food intake. Also, this component of the procedure is fully reversible. The small intestine is re-routed, not removed.

Research has shown this procedure has better long-term weight loss than the other procedures with 98.9% resolution of type 2 diabetes; 99% resolution of hyperlipidemia (high cholesterol); 92% resolution of sleep apnea and 83% resolution of hypertension (high blood pressure).

Possible Complications

Several drawbacks of the procedure include vitamin and mineral deficiencies and protein calorie malnutrition. This can be avoided by regularly taking supplements. Patients may also have foul-smelling stools and flatulence, occasional diarrhea. This can be minimized by reducing fat intake. Patients also may develop gall stones, but this can occur after any form of weight loss surgery.