Roux-en-Y shaped gastric bypass In recent years, there has been a clearer clinical understanding of the restrictive/malabsorptive combination procedure, and thousands of patients who desire successful weight loss have more options. By combining malabsorption, food is delayed with a mixture of bile and pancreatic juices that aid in the absorption of nutrients, causing patients to feel full earlier and reducing the desire to continue eating. This procedure creates a small gastric sac with a capacity of 15 to 20 ml through a mechanical suture device. The rest of the stomach is not removed, but is completely stapled with mechanical sutures and thus separated from the gastric sac. Food flows from this newly formed gastric sac outlet directly into the lower part of the jejunum, so that calories are absorbed in the bypass. This process is completed by separating the small intestine just outside the duodenum, with the aim of lifting it up and joining it to the newly formed gastric sac. The other end is connected to the Roux bypass side of the intestine, forming a “Y” shape, hence the name of the technique. The length of each segment of the intestine can be increased according to the different malabsorption requirements. Advantages of LRYGB: This procedure is the most effective weight loss procedure available, with approximately 70% or more of the overweight portion of the body being lost and 35% of the preoperative BMI being reduced. The weight loss effect can be maintained for a long time and no weight rebound will occur after the minimum value is reached. More importantly, it is a good treatment for metabolic disorder syndrome; Benefits One year after surgery, an average of 77% of excess weight can be lost. Studies have shown that after 10 to 14 years, some patients can maintain a 50-60% reduction in excess body weight. In a study of 500 patients in 2000, 96% of certain related health conditions (back pain, sleep apnea, hypertension, diabetes, and depression) were improved or cured.