What Is It?

The single-anastomosis duodenal switch, also called stomach intestinal pylorus sparing surgery (SIPS).

  1. Similar to the standard duodenal switch operation, except that the small intestine is only transected at the duodeum.
  2. The majority of the most stretchable portion of the stomach is permanently removed (as in a standard sleeve) but basic stomach function remains the same.
  3. Roughly half of the small intestine is bypassed, resulting in a moderate decrease in calorie absorption.

Weight loss is achieved both through restriction of food consumption and malabsorption, which results in very good long-term weight loss maintenance.

The SIPS procedure combines many of the benefits of both the gastric sleeve and the gastric bypass, including the following:

  • Approximately 70% of excess weight loss
  • Improvement/resolution in all major co-morbidities
  • Little risk of “dumping” syndrome
  • Provides predictable weight loss with great long-term success
  • Minimal side effects typical of the duodenal switch
SIPS-Diagram
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