DeLancey J O
Obstet Gynecol. 1986 Jul;68(1):91-7.
This study was undertaken to identify with some precision the location of various paraurethral structures along the length of the urethra. The locations of four areas were identified. The intramural urethra (the area where this structure traverses the bladder wall) extends from the 0 to 15% of total urethral length. The midurethra extends from about 20 to 60% of total urethral length and is the region where one finds the striated urethral sphincter, posterior pubourethral ligaments, and vaginolevator attachments. The urogenital diaphragm with its compressor urethrae and urethrovaginal sphincter is found from 54 to 76% of urethral length. The distal urethra courses from 79 to 100% where the urethra passes between the vestibular bulbs and bulbocavernosus muscles. Some functional considerations of these findings are discussed.
本研究旨在精确确定尿道全长上各种尿道旁结构的位置。确定了四个区域的位置。壁内尿道（该结构穿过膀胱壁的区域）从尿道总长度的0%延伸至15%。尿道中段从尿道总长度的约20%延伸至60%，是发现横纹尿道括约肌、耻骨后尿道韧带和阴道提肌附着处的区域。尿道生殖膈及其尿道压缩肌和尿道阴道括约肌位于尿道长度的54%至76%处。远端尿道从尿道长度的79%延伸至100%，此处尿道在前庭球和球海绵体肌之间穿过。讨论了这些发现的一些功能方面的考虑。
