Single Anastomosis Duodenal Switch
Over the last few years, a less invasive version of the duodenal switch has become an option. This is known as the Single Anastomosis Duodenal Switch. It is also sometimes referred to as SADS, SIPS, SADI, SADI-S, or Loop DS procedure. Instead 2 connections as in the roux-en-y gastric bypass or the more standard duodenal switch , a single connection is made in a so called loop configuration. By having 1 connection instead of 2, the surgery is performed more quickly and with less risk of leak.
The Single Anastomosis DS works by creating a sleeve gastrectomy for restriction and hunger control. After the sleeve, the intestines are rerouted similar to a gastric bypass. The principle measured length is the common channel. This is the distance from where bile and food meet to the end of the intestines and determines the amount of absorption.
Surgery takes about an hour and a half and patients have a similar recovery to the other procedures. The dietary progression is the same. Food enters the sleeve and is held there with the pylorus just like a sleeve. Because of this the dumping syndrome does not occur unlike the gastric bypass.
The ideal patient for a single anastomosis duodenal switch is a patient who has more weight to lose. We know that patients will lose more weight than the other surgical options. Particularly patients with a BMI over 50 will have better and more sustained weight loss than with other procedures. Additional benefits are a lower incidence of ulcers than a gastric bypass operation. This is particularly helpful for patients that need to take NSAIDs such as aspirin, ibuprofen etc.
Patients can expect to lose 80-90% of excess weight in the first year after a duodenal switch operation.*