Roux-en-Y Gastric Bypass
In the Roux-en-Y Gastric Bypass procedure, a small section of the top of the stomach is stapled, creating a small gastric pouch, which is then connected to the jejunum, bypassing the bulk of the stomach.
The remainder of the stomach is then also attached to the mid jejunum to allow digestive juices, to flow into the small intestine to assist digestion.
This procedure is considered permanent, although it can be reversed if required. The most likely outcome in this case would be rapid weight gain