Gastric Bypass

Gastric bypass:

It is one of the oldest bariatric surgeries. It has been recognized as the gold standard in the bariatric surgery. Other than the sleeve gastrectomy, the stomach does not removed but some part of the intestines is disabled. It is an operation that both limits eating and distorts absorption.


Operation is performed under general anesthesia using the laparoscopic method or robotic method. First, the stomach is separated into two parts, and a stomach pouch in the volume of 15-30 ml connected to the esophagus is remained. The remaining part of the stomach remains dysfunctional. The small intestine is separated from 75 cm ahead and sutured to lower end stomach and upper end is sutured to 100-150 cm away from the lower end. Thus, the entering foods arrive first to the small stomach and, from here, they pass into the small intestine part cut before. Digestive enzymes and foods are met 100-150 cm ahead. This creates a malabsorption.


• Efficacy of weight loss is more than the sleeve gastrectomy.
• Rate of getting rid of comorbidities is higher than the sleeve gastrectomy.
• It is reversible, although it is hard to do it.
• It causes to limitation of eating and malabsorption.


• Length of hospital stay is longer.
• Because of it causes to malabsorption, a lifelong vitamin and mineral supplementation is required.
• It is a more complicated and longer operation, thus, has more complications.
• It requires closer follow-up.
• Dumping syndrome may be observed.
• Problems such as congestion and ulcer may be observed related with the intestines.