Kaye K W, Milne N, Creed K, van der Werf B
Urological Research Centre, University of Western Australia, Australia.
Aust N Z J Surg. 1997 Jan;67(1):40-4.
The present study was performed to determine whether a 'urogenital diaphram' exists, to examine the true nature of the striated external urethral sphincter and to evaluate whether the standard technique for radical prostatectomy damages the external sphincter.
Fifty radical prostatectomies were performed using optical magnification and the dorsal bunching technique, and the external sphincter was carefully examined. Ten human cadavers and one 5-year-old baboon were dissected with longitudinal (sagittal) and transverse sections being taken through the prostate apex, membranous and bulbar urethrae. During the standard technique for dorsal vein control during radical prostatectomy, the tissue incorporated within the ligature was examined for striated muscle.
No 'urogenital diaphragm' could be demonstrated in any human or baboon tissue. The striated external urethral sphincter is a cylinder of muscle surrounding the membranous urethra, extending from the perineal membrane to the prostate and continuing over the prostate as part of the anterior fibromuscular stroma. Striated muscle was present in the ligated material from the dorsal venous complex.
The 'urogenital diaphragm' is a myth. The standard technique of radical prostatectomy significantly damages the external sphincter.
本研究旨在确定“尿生殖膈”是否存在，研究横纹肌性尿道外括约肌的真实本质，并评估根治性前列腺切除术的标准技术是否会损伤外括约肌。
采用光学放大和背侧束扎技术进行了50例根治性前列腺切除术，并仔细检查了外括约肌。对10具人类尸体和1只5岁狒狒进行解剖，沿前列腺尖部、膜部尿道和球部尿道作纵（矢状）切和横切。在根治性前列腺切除术中控制背静脉的标准技术操作过程中，检查结扎组织内的横纹肌。
在任何人类或狒狒组织中均未证实存在“尿生殖膈”。横纹肌性尿道外括约肌是围绕膜部尿道的肌肉圆柱体，从会阴膜延伸至前列腺，并作为前纤维肌基质的一部分延续至前列腺上方。背侧静脉复合体的结扎材料中存在横纹肌。
“尿生殖膈”是不存在的。根治性前列腺切除术的标准技术会严重损伤外括约肌。
