Dorschner W, Stolzenburg J U
Department of Urology, Leipzig University, FRG.
Urol Int. 1994;52(4):185-8. doi: 10.1159/000282605.
The urethral component of continence is the object of a lively discussion. A large number of the examiners interpret the external striated urethral muscle as part of the muscular pelvic diaphragm, formed partially or completely by the so-called musculus transversus perinei profundus. About 30,000 histological sections have been examined by light microscopy in a systematical manner. In contrast to numerous suggestions in the literature the musculus sphincter urethrae has been found to be an independent morphological unit in our investigation. It is separated from the surroundings by a segment of connective tissue. Furthermore, with the help of transversal, sagittal and frontal serial sections it was possible to show that the musculus transversus perinei profundus does not exist. In the female as well as in the male in the direction of the urethra the outer sphincter always borders on a layer of smooth muscle cells. In order to distinguish both parts the terms musculus sphincter urethrae transversostriatus and musculus sphincter urethrae glaber are introduced. In the context of a new continence theory three structures capable of occluding the urinary bladder will be discussed. It should be emphasized that the musculus sphincter urethrae glaber makes long-term continence possible.
尿道控尿功能一直是一个热门的讨论话题。许多检查者将尿道外横纹肌解释为盆底肌的一部分，部分或完全由所谓的会阴深横肌构成。我们系统地用光学显微镜检查了约30000个组织切片。与文献中的众多观点相反，我们的研究发现尿道括约肌是一个独立的形态学单位。它通过一段结缔组织与周围组织分隔开来。此外，通过横向、矢状和额状连续切片，我们发现会阴深横肌并不存在。在女性和男性中，尿道方向的外括约肌总是与一层平滑肌细胞相邻。为了区分这两个部分，我们引入了尿道横纹括约肌和尿道光滑括约肌这两个术语。在新的控尿理论背景下，我们将讨论三种能够闭合膀胱的结构。需要强调的是，尿道光滑括约肌使长期控尿成为可能。
