Weight loss surgery, also known as obesity surgery, refers to a series of medical treatments aimed at losing weight for severely obese humans. In the United States, gastric capacity is usually controlled by implanting devices, such as gastric banding and intragastric water polo, or physically reducing gastric capacity, gastric contraction surgery or small intestine shortening surgery, gastric bypass surgery, etc. Long-term research shows that bariatric surgery can reduce weight for a long time. ...