Obese people want to lose weight surgically, how much do you know about surgical weight loss? Gastrectomy: The full name is Laparoscopic Gastric Reduction Surgery, also known as Sleeve Gastrectomy. The principle of Gastric Reduction Surgery is to use laparoscopy to cut out the greater curvature of the stomach vertically, so that the stomach creates a small gastric pouch of about 150 cc, which can hold about 4-5 ounces of food. It has the advantage of not requiring the placement of foreign objects in the body, and the surgery is highly effective in weight loss. Method: Preserve 2-6cm of the gastric antrum above the pylorus in the direction of the greater curvature of the stomach, resect the large part of the stomach along the long axis of the stomach, and resect all of the fundus of the stomach, so that the remaining stomach is in the shape of a banana, with a volume of about 60-80ml. Principle: Reduce the volume of the stomach and decrease the secretion of hormones that stimulate hunger. Advantages: Does not change the physiological state of the gastrointestinal tract and does not interfere with the normal digestion and absorption of food. Evaluation: Sleeve gastrectomy has a good therapeutic effect on type 2 diabetes and is now a widely used surgery in Europe for weight loss and diabetes. How does gastrectomy affect the body? Gastrectomy is a fairly “middle-of-the-road” procedure as the results are somewhere between gastric bypass and gastric banding, and the safety is somewhere in between. If compared with gastric bypass, gastric reduction surgery does not reconstruct the intestinal tract, so there will be no long-term sequelae such as anemia and osteoporosis due to vitamin deficiency. How long does a gastrectomy take? Surgery is low risk and recovery is quick. The surgery is simple and quick, with little trauma, fast recovery and no recurrence. You can eat in 3 days after the surgery, and can be discharged from the hospital in a week. Diet and nutrient absorption are basically unaffected after the surgery, which lasts about 2 hours.