1定义便秘(constipation)的定义因不同人群的理解差异而有所不同,目前的定义已从狭隘的排便频率减少到包括排便困难更广义的范畴。罗马Ⅲ标准提出了便秘的共识定义[1],其包括:(1)排便费力、排干球粪或硬粪、有便意但排不出、排便频率减少或排便不尽感;(2)每周完全排便3次,每天 1 Definitions The definition of constipation varies depending on the understanding of different populations, and the current definition has decreased from a narrow frequency of defecation to a more general one including dyspnea. Rome Ⅲ standard proposed a consensus definition of constipation [1], which includes: (1) defecation effort to drain the ball of manure or hard manure, with the meaning of but not row out, reduce the frequency of defecation or defecation feeling; (2) Bowel completely defecate 3 times a day