[Chinese guideline for bowel preparation for colonoscopy (2019, Shanghai)].

Since the original version of "Chinese guideline regarding bowel preparation for gastrointestinal endoscopy" was published in 2013, bowel preparation has been widely investigated around the world. In order to improve the quality of bowel preparation, this guideline is an official statement issued by Digestive Endoscopy Special Committee of Endoscopic Physicians Branch of Chinese Medical Association and Cancer Endoscopy Committee of China Anti-Cancer Association. Domestic special experts were invited to search and grade the relevant literature published. An expert seminar was held, in which experts discussed and identified the recommendations, assessed the power of recommendations and the quality of evidence using the "grading of recommendations assessment, development and evaluation (GRADE)" system. The guideline offers practical recommendations for endoscopists regarding the whole procedure of bowel preparation including aims and requirements, preoperative education, diet restriction, the options of intestinal cleansing agents, antifoaming agents, contraindications, preparation for specific patients, and bowel preparation for enteroscopy and capsule endoscopy.