肛管腔内超声对肛门括约肌的形态学观察与评价

Endoanal sonographic evaluation of the anal sphincter

目的:研究肛门括约肌形态结构及超声特点,评价肛管腔内超声在肛周结构影像学研究中的价值.方法:本组回顾性研究2009-04/12380例混合痔患者肛管腔内超声图像特点,采用EUB5500超声诊断仪分析耻骨直肠肌,肛门内、外括约肌的回声特点.结果:女性耻骨直肠肌平均厚度7.6mm±2.1mm,肛门内括约肌2.8mm±0.6mm,外括约肌7.6mm±0.8mm.男性耻骨直肠肌7.5mm±1.5mm,肛门内括约肌3.4mm±0.6mm,外括约肌7.8mm±0.9mm.不同性别耻骨直肠肌厚度未见明显差异,但60岁以上年龄组耻骨直肠肌厚度较年轻组明显增厚.肛门内括约肌厚度随年龄增长有增加趋势,且男性厚度高于女性.肛门外括约肌厚度与不同性别、年龄未见相关.身高、体质量与肛门外括约肌、肛门内括约肌及耻骨直肠肌厚度未见明显相关.结论:肛管腔内超声对肛周结构影像学研究有重要价值.

AIM：To investigate the morphostructural and sonographic features of the anal sphincter,and to evaluate the value of endoanal sonography in the imaging of perianal structures.METHODS：The endoanal sonographic features of 380 patients with mixed hemorrhoid who were treated from April 2009 to December 2009 were reviewed retrospectively to analyze the echo features of the puborectalis muscle （PA）,internal anal sphincter （IAS） and external anal sphincter （EAS）.RESULTS：In females,the average thickness of the PA,IAS and EAS was 7.6±2.1,2.8±0.6 and 7.6±0.8 mm,respectively,while the corresponding figures in males were 7.5±1.5,3.4±0.6 and 7.8±0.9 mm.The thickness of the PA did not significantly differ between two sexes,but was higher in males above 60 years than in younger males.The thickness of the IAS was lower in females than in males and increased with age.Sex and age had no significant correlation with the thickness of the EAS.The thickness of the anal sphincter was not correlated with the body height and weight.CONCLUSION：Endoanal sonography is valuable for evaluation of the anal sphincter.