Roux-en-Y Gastric Bypass Surgery consists of separating the stomach into two sections using parallel rows of titanium staples, with the staples additionally over-sewn or secured with sutures as needed. The staples remain in place. The small upper segment connected to the esophagus remains the functional portion of the stomach, while the larger lower segment connected to the duodenum becomes the non-functioning portion of the stomach.
Laparoscopic adjustable gastric banding, like divided gastric bypass surgery, involves restricting the stomach size. However, the process of restricting differs and is both adjustable and reversible.