Bariatric and metabolic surgery is an effective treatment for obesity and metabolic syndrome with definite results. In recent years, bariatric and metabolic surgery has developed rapidly, and the surgical indications and procedures have gradually matured. At the same time, the complications have also been widely discussed, including those specific to bariatric metabolic surgery and the risks common to gastrointestinal surgery, of which gastrointestinal leak is one of the most important and serious complications, which can be life-threatening in severe cases. This paper will review the mechanisms, clinical manifestations, diagnostic strategies, prevention, and treatment advances related to gastrointestinal leak after bariatric metabolic surgery based on the two major procedures that cause gastrointestinal leak, namely, staple line leak after laparoscopic sleeve gastrectomy and gastrojejunostomy leak after laparoscopic Roux-en-Y gastric bypass.

Objective To establish a comprehensive evaluation indexing system to appraise the implications of prevention and treatment of HIV/AIDS ,and to calculate the weight of each indicator .Methods Based on the idea of performance and input-out-put ,professional consultation ,and Delphi method was determined as the evaluation index system ,analytical hierarchy process (AHP) was used to calculate the weight value for each indicator .Results The evaluation indexing system had been established af-ter three rounds of professional consultation .It contained two 1st class indicators ,six 2nd class indicators and thirty-one in 3rd class indicators .The weight value of each indicator was calculated .Conclusion The evaluation indexing system that has been established and the weight value quantities are of completeness ,practicality ,operability and logic .They have important value for application in the future .