Noordzij J W, Dabhoiwala N F
Department of Urology, Academic Medical Centre, Amsterdam, The Netherlands.
Scand J Urol Nephrol. 1993;27(3):371-80. doi: 10.3109/00365599309180449.
Macro- and microscopic dissection of 8 adult and 2 fetal human bladders was undertaken in two directions as part of a study to evaluate ureterovesical junction function. In the trigonal region the detrusor muscle consists of 3, more or less triangular layers. Both ureters are only loosely enveloped by a fibromuscular sheath of mainly bladder origin. This design allows for easy movement of the ureters on their oblique course through the bladder wall. The ureteral muscle fibers play only a minor part in the sheath or join the detrusor muscle. The majority fan out to end at the bladder mucosa or intermingle with fibers originating from the opposite ureter. Since an intricate muscular structure can be demonstrated, an active anti-reflux muscular component in the normal human bladder seems plausible. A classic ureteral sphincter mechanism does not exist. Our findings are discussed and compared with data from the literature.
作为一项评估输尿管膀胱连接部功能研究的一部分，对8个成人及2个胎儿的人类膀胱进行了大体和显微镜下的双向解剖。在三角区，逼尿肌由3层或多或少呈三角形的肌层组成。两条输尿管仅被主要起源于膀胱的纤维肌鞘松散地包裹。这种结构使得输尿管在斜行穿过膀胱壁时易于移动。输尿管肌纤维在鞘中仅起次要作用，或与逼尿肌相连。大多数肌纤维呈扇形散开，止于膀胱黏膜或与来自对侧输尿管的纤维交织。由于可以证明存在复杂的肌肉结构，正常人类膀胱中存在主动抗反流肌肉成分似乎是合理的。经典的输尿管括约肌机制并不存在。我们将讨论我们的发现，并与文献数据进行比较。
