研究肛门外括约肌(EAS)的局部解剖,以确定最佳插针位置。 方法 15例健康妇女(0～4产次),年龄28～74岁(平均50±14岁),身高150～171cm(平均162±5cm).受检者左侧卧位,臂和膝屈曲,右大腿接地线,测量皮肤粘膜交界与肛门的距离。插入位置均在EAS后部,且位于皮肤粘膜交界和肛门连线上.在皮肤粘膜交界处作首次插入.若未探测到肌肉,则以5mm间距朝肛门方向继续插针,直到探测到EMG活动。每次插入都要注意首次听到和看到的清 Local anatomy of the external anal sphincter (EAS) was studied to determine the optimal pin placement. Methods Fifteen healthy women (0-4 births), aged from 28 to 74 years old (mean 50 ± 14 years) and 150-1 171 cm (average 162 ± 5 cm) Right thigh ground line, measure the distance between mucocutaneous junction and anus. Inserted at the rear of the EAS and on the mucocutaneous junction and anus, inserted first at the mucocutaneous junction.If no muscle is detected, the needle is continued in the anus at 5mm intervals until EMG activity is detected . Pay attention to the first time you hear and see each insertion