| a surgical procedure by which all or part of the stomach is circumvented by anastomosis to the small intestine, performed to overcome obstruction or in the treatment of morbid obesity. |
gastric bypass n.
A surgical procedure used for treatment of morbid obesity, consisting of the severance of the upper stomach, anastomosis of the small upper pouch of the stomach to the jejunum, and closure of the distal part of the stomach.