[Procedural guideline for laparoscopic one anastomosis gastric bypass (OAGB) (2022 edition)].

The quantity of cases of metabolic and obesity-related diseases including obesity and type 2 diabetes in China are increasing each year. The total numbers of both existing patients and new patients each year are rated as the highest in the world. A large amount of evidence-based medical reports have shown that bariatric surgery can effectively reduce excessive body weight in patients with morbid obesity, and alleviate the effects of a series of obesity-related metabolic comorbidities, including type 2 diabetes. Laparoscopic one anastomosis gastric bypass (OAGB) is currently one of the most widely practiced bariatric surgeries procedures in the world. Although this procedure has been carried out on patients in China for more than 15 years, the standard surgical operation for OAGB has not been subject to relevant guidelines or consensus. In light of this, Chinese Society for Metabolic & Bariatric Surgery (CSMBS) recently initiated the compilation of the first edition of the "Procedural guideline for laparoscopic one anastomosis gastric bypass (2022 Edition)", aiming to provide a unified specifications for this procedure. It will provide a reference for surgical operating standards for clinicians in the field of obesity-related metabolic surgery to reduce or avoid complications caused by irregular surgery, and will ultimately benefit more patients.