阴道分娩时会阴三度裂伤１１例分析娄桂荣，王敬薇，韩旭，王卓然在分娩过程中，由于先露部的下降与对盆底的直接压迫，肛提肌向下与两侧扩展，会阴体变薄，阴道皱襞展平，所以会网与阴道是分娩期最易被损伤的部分．除盆底肌肉外，凡同时累及部分或全部肛门括约肌，甚至直... Vaginal delivery of the third episode of perineal laceration Lou Guirong, Wang Jingwei, Han Xu, Wang Zhuoran in the delivery process, due to the first dew drop and direct compression of the pelvic floor, levator ani muscle downward and bilateral expansion, perineum Body thinning, vaginal folds flattening, so the net and the vagina is the most vulnerable part of the childbirth period. In addition to pelvic floor muscles, where both involve some or all of the anal sphincter, and even straight ...