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The Traditional Duodenal Switch (DS), like the gastric bypass (RYGB) and the ModDS is both a malabsorptive and restrictive surgery. The combination of malabsorption and restriction makes the Traditional DS, ModDS surgery, and RYGB, extremely effective at enabling our patients to lose weight and keep it off. Patients can lose more weight with bariatric surgeries that have both restrictive and malabsorptive components. The Traditional DS procedure was first done in 1986. In this procedure, over 90% of the small intestine was bypassed which produced excellent weight loss results but came with a significant risk of long-term complications. Most of the studies showed that such risk to be over 30%. Because of this high complication rate, very few surgeons in the United States perform this surgery and it now represents less than 5% of all weight loss surgeries done in the country today.

There are 2 main differences between the Traditional DS and the ModDS. The biggest difference between these 2 procedures is that the Mod DS only bypasses 50-60% of the small intestine which results in a significantly reduced rate of diarrhea, malnutrition, and vitamin deficiencies while maintaining the same excellent weight loss. The 2nd major difference is that the ModDS does not involve the second anastomosis (connection of bowel) downstream. This 2nd connection was intended to divert bile to the bowel further downstream and prevent bile from refluxing back into the stomach. However, with the pylorus intact (a valve that prevents bile from going into the stomach), this 2nd connection is considered unnecessary by many surgeons. Further, this second connection, like the Gastric Bypass, increases the risk for life-threatening small bowel obstructions from internal hernias. This is almost never encountered with the ModDS procedure. Although the Traditional DS provides for excellent weight loss, it does come with increased risk. When the Surgeons at Roller Weight loss perform the Traditional DS procedure, the common channel is made at 300cm resulting in a bypass of only 50-60% of the intestine in hopes of avoiding this significant and life-threatening risk of malnutrition seen in the original Traditional DS procedures.

Expected Weight Loss from Traditional Duodenal Switch Surgery

70-95% of your excess weight*

Traditional DS patients tend to lose more than gastric bypass patients.

The first step in your weight loss journey is to register for one of our weight loss seminars.

*Results may vary from person to person.


Are you ready to take the first step on the road to a longer, healthier life? Attend one of our FREE online seminars to learn more about our weight loss program and which path may be right for you.