Skip to main content
186 East 76th St First Floor, NY 10021
Gastric Bypass vs Duodenal Switch: Choosing the Correct Weight Loss Surgery Procedure

Gastric Bypass vs Duodenal Switch: Choosing the Correct Weight Loss Surgery Procedure


With more of the U.S. population showing signs of weight increase, obesity is a growing concern. There are several complications related to the condition—most being fatal. In cases where exercise and diet are not enough to help, experts suggest bariatric weight loss surgeries. Here is what you need to know to choose between the two standard weight loss procedures: duodenal switch surgery vs. gastric bypass.

The Gastric Bypass

Gastric bypass has been around since the 50s and has proven to be one of the most effective ways to battle obesity. It is also called the Roux-en-Y and has a simple objective: To make the patient’s stomach smaller. The surgeon alters the intestines’ anatomy, changing the path of the food to reduce the digestive process by two-thirds. This way, the stomach gets smaller, making you feel full faster and lowering the calorie count.

The Duodenal Switch

This procedure is known scientifically as the BPD-DS (biliopancreatic diversion with duodenal switch). The difference between gastric bypass and duodenal switch is that this procedure starts with the gastric sleeve, followed by adjusting the intestines. During the gastric sleeve surgery, the stomach is permanently reduced to about 15%, making it more tube-like.

After resizing the stomach, the intestines are rearranged and rerouted, avoiding contact with the digestive juices. The goal is to reduce how many calories are absorbed in the body. Ultimately, the duodenal switch incorporates two procedures in one—malabsorptive and restrictive—leading to massive weight loss.

Duodenal Switch Vs Gastric Bypass: Which To Choose

Several factors come into play when deciding which technique to opt for. You need to choose an effective yet safe procedure. While the professionals will help you choose the perfect procedure, you should also know the pros and cons of each. Gastric bypass surgery is the most common, ideal for patients with a BMI of 40-50, and takes only 2 hours.

In contrast, the duodenal switch surgery works for patients whose BMI is over 50, is more invasive, and takes about 4 hours. When helping decide, doctors present the risks and advantages involved in both procedures. They account for your health, your expected weight loss level, and the probability of complications.

Seek the Help of a Professional

Surgery is effective in matters of massive weight loss. It helps reduce mobility issues, back and joint pains, sleep apnea, and several other obesity-related complications. Consider gastric bypass surgery in NYC if considering a go-to procedure with numerous benefits. Our professionals at Lenox Hill Hospital will guide you from the consultation to recovery and beyond.