Abstract:

Abstract： Objective To investigate the coccygeal muscles changes in female patients with pelvic organ prolapse （POP）.Methods From August 2014 to January 2015，female patients with pelvic organ prolapse we collected in Shengjing Hospital of China Medical University（experimental group） (25 cases)，aged from 41 to 80 years old;25 cases volunteers without pelvic organ prolapse or other diseases were included as control group，aged 45～80 years old.They were scanned under state of calm by MRI，and planes of upper and middle of hip joint，and the plane of the uterus - the coccyx were selected,then we measured and compared bilateral coccygeal muscle thickness.The change of coccygeal muscles thickness was shown by calculating the muscle thickness differences of different levels.The measurement results were made independent sample t test.Result In experimental group and control group bilateral coccygeal muscle thickness showed no significant difference. Compared with the control group，the difference of bilateral coccygeus average thickness in experimental group was not significant （P> 0.05）.In experimental group the difference between left and right coccygeal muscle thickness was （3.51±1.79）mm and （3.62 ±1.33）mm，greater than control group (2.61±0.87)mm，(2.83±1.24)mm. The difference was statistically significant （left P=0.029，right P=0.035）.Conclusion There is no significant difference between the left and right coccygeal muscle thickness. Coccygeal muscle in the pelvic floor support structure plays a limited role. In POP patients，coccygeal muscle may have anatomical change.

Key words: pelvic organ prolapse, coccygeal muscles, magnetic resonance imaging

摘要：

目的 探讨女性盆腔器官脱垂（POP）患者尾骨肌厚度的变化。方法 收集2014年8月至2015年1月于中国医科大学附属盛京医院就诊的女性盆腔器官脱垂患者（观察组）25例，无器官脱垂及其他盆腔疾病志愿者（对照组）25例。于平静状态下进行磁共振（MRI）扫描，分别选取髋关节上份平面，髋关节中份平面及尾骨-子宫平面三个层面，测量、比较双侧尾骨肌厚度，并通过计算不同层面肌肉厚度的差值表现尾骨肌厚度的变化程度。对测量结果进行独立样本t检验。结果 观察组与对照组内左、右侧尾骨肌厚度差异无统计学意义（P＞0.05）；观察组双侧尾骨肌平均厚度与对照组相比差异无统计学意义（P＞0.05）；观察组左、右侧尾骨肌厚度差值[（3.51±1.79）mm、（3.62±

关键词: 盆腔器官脱垂, 尾骨肌, 磁共振成像