The stomach is cut off (not removed) at the upper end of the stomach, forming a small gastric sac at the upper end, and the position of the small intestine is determined according to the degree of obesity. The distal small intestine is anastomosed with the gastric pouch, and the proximal small intestine is anastomosed with the lateral surface of the distal small intestine. In this case, the capacity of the stomach is only about 30-50 ml, and more than 90% of the stomach is removed.
There is also a "sleeve gastrectomy", which really cuts off a part of the stomach and takes it out of the body to "directly" reduce the capacity of the stomach. Surgery is usually performed under laparoscopy, with the large curved side of the stomach removed and the small curved side kept tubular. "If you don't eat, the normal stomach capacity is 500 ml on average. After resection, the gastric volume is 100ml, which means that there is still one fifth left after resection. "
As for the choice of gastric incision, it depends on the doctor's judgment and the patient's needs. Gastric bypass is suitable for obese diabetic patients. The operation is more difficult, because to rebuild the digestive system, sleeve gastrectomy is suitable for simple obesity.
Key points: Gastrectomy is only suitable for morbidly obese people, and it is not allowed for people with normal weight or even obesity.