摘要目的　探寻肛管压力的对称性变化趋势的存在与否,探讨它对括约肌功能状态的定量评价.方法　采用瑞典CTD桽YNECTICS公司提供的高分辨多通道胃肠功能测定仪对27例正常儿童及12例肛门失禁患儿进行括约肌压力及其偏位的测定,观察压力及其偏位的变化趋势.结果　静息及收缩状态下,正常儿童肛管直肠之间不仅存在明显升高的压力梯度变化,而且存在明显降低的压力偏位梯度变化,并且在距离肛门缘1cm处形成压力及其偏位变化的特征位点.失禁患儿不存在上述四个梯度变化,也不存在特征位点.结论　括约肌压力梯度及压力偏位梯度可以用来定量地描述括约肌的功能状态.

abstractsObjectives To assess the tendency of manometric asymmetry, and to quantitatively evaluate the function of the anal sphincter. Methods Using the PC polygram HR at the states of relax and squeeze, we compared the values of pressure asymmetry in the anorectum of 27 normal children with that of 12 children with fecal incontinence. Results In the two states, the anal sphincter in normal children showed not only the gradient of pressure, but also a gradient of pressure asymmetry. Children with fecal incontinence did not show any gradients. Conclusion Gradients of pressure and pressure asymmetry can quantitatively evaluate the function of the anal sphincter.