The duodenal switch is a type of combined two kind of weight loss surgery, malabsorptive and restrictive surgery. There are many names for the duodenal switch, including DS and biliopancreatic diversion with duodenal switch. This surgery decreases the number of calories that can be absorbed by the body and the quantity of food that can be accommodated by the stomach.
The duodenal switch combines the creation of a moderately sized stomach pouch with bypassing part of the small intestine.
This surgery allows the patient to lose weight without significantly altering their eating habits. The stomach is able to hold approximately five to six ounces of food, while other common procedures typically leave it able to hold one half to one full ounce.