Biliopancreatic diversion is a malabsorptive procedure that decreases the amount of calories absorbed in your small intestine.
Your surgeon will begin by removing part of the stomach, leaving only a small pouch behind.
Next, he or she will sew the small intestine to the pouch.
This creates a direct route from the pouch to the end of the small intestine.
The duodenum and jejunum are bypassed, so few calories and nutrients are absorbed.