It is one of the oldest obesity and metabolic surgeries. It has long been considered the gold standard in obesity surgery. Unlike gastric sleeve surgery, the stomach is not removed and some of the intestines are disabled. It is an obesity surgery that both restricts eating and disrupts absorption.

Technique: The surgery can be performed laparoscopically or roboticly under general anesthesia. First, the stomach is divided into 2 parts and a stomach pouch with a volume of 15-30 ml is left connected to the esophagus. The remaining stomach part remains dysfunctional. The small intestine is separated 75 cm ahead, the lower end is sewn to the stomach, and the upper end is sewn 100-150 cm away from the lower end. Thus, the food taken first passes into the small stomach created and from there to the small intestine. Digestive enzymes meet the food 100-150 cm away. This situation causes malabsorption.

• Those between the ages of 18 and 65 can undergo surgery, and in special cases and if the board decides, those under the age of 18 and over the age of 65 can also undergo surgery.
• Those with a body mass index over 35,
• Those with a body mass index between 30-35 and additional weight-related comorbidities (hypertension, cholesterol, diabetes, sleep apnea, heart failure, metabolic syndrome, etc.)
• Those who have tried other treatment methods to lose weight and failed,
• Those who can handle surgery and anesthesia,
They may have gastric bypass surgery.