This document is an update to the 2014 recommendations for optimizing the adequacy of bowel cleansing for colonoscopy from the US Multi-Society Task Force on Colorectal Cancer, which represents the American College of Gastroenterology, the American Gastroenterological Association, and the American Society for Gastrointestinal Endoscopy. The US Multi-Society Task Force developed consensus statements and key clinical concepts addressing important aspects of bowel preparation for colonoscopy. The majority of consensus statements focus on individuals at average risk for inadequate bowel preparation. However, statements addressing individuals at risk for inadequate bowel preparation quality are also provided. The quality of a bowel preparation is defined as adequate when standard screening or surveillance intervals can be assigned based on the findings of the colonoscopy. We recommend the use of a split-dose bowel preparation regimen and suggest that a 2 L regimen may be sufficient. A same-day regimen is recommended as an acceptable alternative for individuals undergoing afternoon colonoscopy, but we suggest that a same-day regimen is an inferior alternative for individuals undergoing morning colonoscopy. We recommend limiting dietary restrictions to the day before a colonoscopy, relying on either clear liquids or low-fiber/low-residue diets for the early and midday meals. We suggest the adjunctive use of oral simethicone for bowel preparation before colonoscopy. Routine tracking of the rate of adequate bowel preparations at the level of individual endoscopists and at the level of the endoscopy unit is also recommended, with a target of >90% for both rates.

本文件是对2014年美国结直肠癌多协会工作组关于优化结肠镜检查肠道清洁充分性建议的更新，该工作组代表美国胃肠病学学会、美国胃肠病学协会和美国胃肠内窥镜学会。美国多社会工作组制定了共识声明和关键临床概念，解决结肠镜检查肠道准备的重要方面。大多数共识声明集中于肠道准备不足的平均风险个体。然而，也提供了针对肠道准备质量不足风险个体的声明。当可以根据结肠镜检查结果指定标准筛查或监测间隔时，肠准备的质量被定义为足够。我们建议使用分剂量的肠道准备方案，并建议一个2升的方案可能是足够的。对于下午进行结肠镜检查的患者，建议当天的方案是可接受的替代方案，但我们建议当天的方案对于上午进行结肠镜检查的患者是次等的替代方案。我们建议将饮食限制限制在结肠镜检查的前一天，依靠清澈的液体或低纤维/低残留物的饮食作为早午餐。我们建议在结肠镜检查前辅助使用口服西甲硅氧烷进行肠道准备。还建议在个体内窥镜医师水平和内窥镜单元水平上对肠道充分准备率进行常规跟踪，两种率的目标均为90%。