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随着儿童消化内镜技术的普及，小儿结肠镜检查应用越来越广泛。肠道准备作为行肠镜检查的基础，直接影响肠镜的诊疗结果。相较于成人，儿童的重要脏器功能发育不完善，认知、沟通、耐受能力较弱。儿童的消化道结构在不同年龄阶段也存在较大差别。目前国内尚无针对儿童消化内镜相关肠道准备的循证指南，因此在结合我国临床实践的基础上，制订符合国际标准的儿童肠道准备循证指南，对于指导我国儿童的肠道准备具有重要意义。本指南联合多学科专家，基于现有证据，采用推荐意见分级的评估、制订及评价(Grades of Recommendations Assessment, Development and Evaluation，GRADE)系统，遵循国际指南报告规范(Reporting Items for Practice Guidelines in Healthcare，RIGHT)，制订我国儿童消化内镜诊疗相关肠道准备指南，以期为儿科医师提供指导与决策依据。“,”With the popularization of digestive endoscopy in children, colonoscopy has been widely used. As the basis of digestive endoscopy, bowel preparation directly affects the diagnosis and treatment results of colonoscopy. Compared with adults, the function of the important organs of children is not mature, and their ability of cognition, communication and tolerance are weak. Their structure of the digestive tract is also significantly different in different ages. However, there are no existing evidence-based guidelines on bowel preparation for digestive endoscopy of Chinese children. Therefore, it is important to develop evidence-based guidelines for bowel preparation combined with the clinical practice in China. In order to provide guidance and decision-making basis for Chinese pediatricians, we collaborated with multidisciplinary experts, based on existing evidence, adopted the grading of recommendations assessment, development and evaluation (GRADE) approach, and followed the Reporting Items for Practice Guidelines in Healthcare (RIGHT) to develop this guideline for bowel preparation related to the diagnosis and treatment of children′s digestive endoscopy.