本研究对30名排便造影认为是耻骨直肠肌综合征(PRS)患者利用CT扫描,并结合临床特别是手术后观察所见,进行分析且与30名正常人检查情况作对照。结果发现20例正常人ARA静坐相103°±8.3°,力排相为112°±11.5°,较静坐相明显增大。30例PRS患者中17例ARA静坐相为98°±5.6°,力排相为89°土3.7°,较静坐相明显减小,且均伴有PRMI,PRMI宽度2.44±0.7cm,深度1.2±0.3cm。而另外13例静坐力排时ARA均无变化,为90°±6.5°,钡剂不排或少排且均出现“搁架征”。30例PRS患者耻骨直肠肌厚度为5.6±1.8mm;20例正常人的耻骨直肠肌厚度为2.4±0.6mm。两者比较,P<0.01。PRS患者手术所见耻骨直肠肌厚度与CT影像表现无明显差异。从而认为耻骨直肠肌及周围肌肉组织的过于肥厚或瘢痕化形成、或痉挛压迫,致使肛直角变小,排便时出现“搁架征”,使大便难以顺流而下是PRS的发病因素。最常伴有的并发病为直肠前突,这是因为粪流向前冲击松弛的直肠前壁粘膜的缘故。 In this study, 30 patients with suspected defecation of the puborectalis syndrome (PRS) underwent contrast-enhanced CT scan and analyzed with clinical observation, especially postoperative observation, and compared with 30 normal subjects. The results showed that ARA of 20 normal subjects were found to be 103 ° ± 8.3 ° in meditation phase and 112 ° ± 11.5 ° in force phase, which was significantly increased compared with sitting phase. Among the 30 patients with PRS, 17 cases of ARA had a meditation phase of 98 ° ± 5.6 ° and a force phase of 89 ° ± 3.7 °, which was significantly lower than that of the sedentary phase and both had PRMI with a width of 2.44 ± 0.7 cm and a depth of 1.2 ± 0.3cm. The other 13 cases of medial row ARA no change for the 90 ° ± 6.5 °, barium row or less rows and appear “shelf sign.” Thirty patients with PRS had puborectalis muscle thickness of 5.6 ± 1.8 mm; 20 normal subjects had puborectalis thickness of 2.4 ± 0.6 mm. The two were compared, P <0.01. PRS patients seen in puborectalis muscle thickness and CT imaging showed no significant difference. So that the puborectalis muscle and surrounding muscle tissue over hypertrophy or scar formation, or convulsions oppression, resulting in anal angle becomes smaller, defecation “shelves sign”, so that the stool is difficult to downstream down is the incidence of PRS. The most common complication is rectocele, which is due to the forward impact of loose excrement on the relaxed rectal mucosa of the rectum.