Gastric bypass procedures (GBP) are any of a group of similar operations that first divides the stomach into a small upper pouch and a much larger lower “remnant”
Gastric bypass procedures (GBP) are any of a group of similar operations that first divides the stomach into a small upper pouch and a much larger lower “remnant” pouch and then re-arranges the small intestine to allow both pouches to stay connected to it. Surgeons have developed several different ways to reconnect the intestine, thus leading to several different GBP names. Any GBP leads to a marked reduction in the functional volume of the stomach, accompanied by an altered physiological and physical response to food.
The operation is prescribed to treat morbid obesity, defined as a Body mass index greater than 40, and also to treat type 2 diabetes, hypertension, sleep apnoea, and other co-morbid conditions. Bariatric surgery is the term encompassing all of the surgical treatments for morbid obesity, not just gastric bypasses, which make up only one class of such operations. The resulting weight loss, typically dramatic, markedly reduces comorbidities.
The long-term mortality rate of gastric bypass patients has been shown to be reduced by up to 40%. As with all surgery, complications occur. One study, from the years 2005-2006, showed that surgery-related death occurred for 0.5% of patients, from complications within six months of surgery.