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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±1.33)mm]大于对照组[(2.61±0.87)mm、(2.83±1.24)mm],且差异有统计学意义(均P<0.05)。结论尾骨肌厚度左右对称;POP患者仅尾骨肌厚度差值显著增大,说明尾骨肌在POP后仅在解剖走行发生变化,提示尾骨肌在盆底支持结构中所起到的支撑作用可能有限。
Objective To investigate the changes of coccyx muscle thickness in women with pelvic organ prolapse (POP). Methods Twenty-five patients with pelvic organ prolapse (observation group) and 25 patients without organ prolapse and other pelvic disease volunteers (control group) were enrolled in this study from August 2014 to January 2015 in Shengjing Hospital affiliated to China Medical University. . MRI was performed under calm condition. The upper hip plane, the middle hip plane and the coccyx-uterine plane were respectively selected to measure and compare the thickness of bilateral coccyx muscle. By calculating the muscle thickness at different levels The difference shows the degree of changes in the thickness of the coccyx muscle. The results of the independent sample t test. Results There was no significant difference in the thickness of left and right coccyx muscle between observation group and control group (P> 0.05). The average thickness of bilateral coccyx muscle in observation group was not significantly different from that in control group (P> 0.05) The differences in the thickness of the left and right coccyx between the two groups were statistically significant ([(3.51 ± 1.79) mm, (3.62 ± 1.33) mm] compared with those in the control group [(2.61 ± 0.87) mm, (2.83 ± 1.24) mm] (All P <0.05). Conclusion The thickness of coccyx muscle is symmetrical. The difference of only the thickness of coccyx muscle in POP patients is significantly increased, which indicates that the changes of coccyx muscles only in the dissection after POP, suggesting that the supporting function of coccyx muscle in pelvic floor support structure may be limited.