Sandridge D A, Thorp J M
Department of Obstetrics and Gynecology, Memorial Mission, Asheville, USA.
Obstet Gynecol. 1995 Dec;86(6):1007-9. doi: 10.1016/0029-7844(95)00324-K.
Endosonography from within the anus has been used to image the anorectum and its associated musculature. A 5.0-MHz endovaginal probe was inserted vaginally, and longitudinal and cross-sectional views of the anorectum were obtained. We were able to measure rectal length and diameter, puborectalis thickness and angle, thickness of internal and external anal sphincter, and the curvature of the anal canal. We visualized defects in the internal and external anal sphincters. Suitable images were obtained from 70 subjects. Muscle thicknesses were within previously published ranges. Twenty-five of 70 subjects (36%) had defects of the internal anal sphincter, and 19 of 65 subjects (29%) had defects of the external anal sphincter.
经肛门内超声检查已用于对肛管直肠及其相关肌肉组织进行成像。将一个5.0兆赫的阴道探头经阴道插入，获取肛管直肠的纵向和横截面图像。我们能够测量直肠长度和直径、耻骨直肠肌厚度和角度、肛门内括约肌和外括约肌厚度以及肛管曲度。我们观察到肛门内括约肌和外括约肌存在缺损。从70名受试者获得了合适的图像。肌肉厚度在先前发表的范围内。70名受试者中有25名（36%）存在肛门内括约肌缺损，65名受试者中有19名（29%）存在肛门外括约肌缺损。
