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什么是耻骨直肠肌综合征
耻骨直肠肌综合征(puborectal muscle syndrome)是一种以耻骨直肠肌痉挛性肥大,致使盆底出口处梗阻为特征的排粪障碍性疾病。组织学改变为耻骨直肠肌肌纤维肥大。
耻骨直肠肌综合征的症状表现
缓慢进行加重的排粪困难,排粪过度用力,排粪时间过长,每次达1~2小时,粪块细小,便次频繁及有排粪不全感。部分患者排粪时肛门或骶区疼痛,精神常较紧张。
耻骨直肠肌综合征的常见原因
1.便秘并发直肠黏膜内套叠、脱垂而阻塞肠腔,术中未同时处理。
2.耻骨直肠肌与盆底肌和直肠壁之间有肌束连附。
3.感染或多次行肛管直肠、盆底手术,使耻骨直肠肌瘢痕化严重,常收不到满意的效果。
耻骨直肠肌综合征的治疗
1.非手术办法
(1)扩肛办法:常规消毒麻醉后,进行指法扩肛,扩张至可容4指,扩张时间为5min左右,每周1次。
(2)yao物治疗:①通便yao物保留灌肠;②可服用多纤素等;③中yao熏洗肛门。
(3)其他:可采用生物反馈办法及按摩法等。
2.手术办法
多采用耻骨直肠肌部分切断的方法,有助于解除肛管狭窄,从而缓解排粪困难。
术前要注意排除影响手术效果的其它原因:如应在术前先行局部理疗和气囊扩肛,使瘢痕软化,恢复肛管直肠的顺应性;常可达到奏效的目的。
操作方法:按常规做好消毒、骶部麻醉等术前准备,在尾骨尖向下做正中切口,长4.0~5.0cm。电刀逐层切开,暴露尾骨尖,即为耻骨直肠肌上缘标志。术者左食指伸入直肠,向上顶起耻骨直肠肌,以弯钳将其自肠壁小心分离,注意不要损伤肠壁,于两钳间切除耻骨直肠肌肌束1.5cm宽,残端缝扎止血,冲洗伤口。并放置橡皮片引流。缝合皮下组织及皮肤。术后24小时拔除引流片,注意伤口出血、裂开、窦道形成及伤口感染等并发症。一般无大便失禁。
绞窄性脐疝有肠管坏死者应切除坏死肠襻并行肠吻合术。若病人的一般情况很差,则疝修补术留待以后处理。
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