中文摘要：

目的探讨肛提肌厚度与盆腔器官脱垂（pelvic organ prolapse，POP）的相关性；方法收集2005年3月至2006年5月间住院治疗的POP患者（POP组）14例，年龄40～82岁，其它妇科良性疾病患者（对照组）22例，年龄24～65岁。所有病例均于静息及提肛状态下行MRI扫描，利用医学影像分析软件分析处理MRI原始图象，测量并比较肛提肌厚度。结果在平静及缩肛状态下，POP组与对照组相比较左、右两侧肛提肌厚度差异均无有显著性（P〉0．05）；在平静及缩肛状态下，对照组同一患者左侧肛提肌厚度大于右侧，差异均具有显著性（P〈0．01）；在缩肛状态下，POP组患者左侧肛提肌厚度大于右侧，差异具有显著性（P〈0．01），但平静状态下，POP组患者两侧肛提肌厚度差异无统计学意义（P=0．059）；对照组两侧肛提肌缩肛前后厚度变化差△T差异具有显著性（左侧P〈0．01，右侧P〈0．05），而POP组两侧肛提肌△T差异无统计学意义（左侧：P=0．146；右侧：P=0．568）。结论肛提肌存在不对称现象；POP患者肛提肌厚度与对照组相比无差异，但可能存在收缩功能下降，

英文摘要：

Objective To study the correlation of the thickness of levator ani and pelvic organ prolapse （POP）. Methods From March 2005 to May 2006,14 patients with POP （ POP group）, ranged from 40 to 82 years old, and 22 patients with other benign gynecological disease （ control group）, ranged from 24 to 65 years old, were selected. All patients underwent MRI scan in peace and straining condition. Original images were dealed with medical image analysis system and than the thickness of levator ani were measured. Results In both peace and straining condition, the thickness of left levator ani had no significant difference with that of the control and POP group （ P 〉 0.05 ）. In both peace and straining condition, the left levator ani was significantly more thicker than right one（ P 〈 0.01 ）. There was significant difference in the thickness between right and left levator ani of POP group（ P 〈0.01 ）in straining condition,but there was no difference in peace condition（P =0. 059）. There was statistical significance in the thickness of the same levator ani before and after straining in control group（ left：P 〈 0.01, right： P 〈 0.05 ）, but no significant difference in POP group （lefl：P = 0. 146;right：P = 0. 568 ）. Conclusion There is asymmetry between the left and fight levator ani. There is no difference in the thickness of leavtor ani between control and POP group, but the contractive function of the levator ani may decrease in POP patients.