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Development of an experimental system for the study of urethral biomechanical function.

机译:开发用于研究尿道生物力学功能的实验系统。

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摘要

Despite its principal mechanical function in the storage and release of urine, the biomechanical properties of the urethra have remained largely unexplored. The purpose of this study was to develop and validate an experimental model that can be used for evaluating whole urethral tissue in such a manner. Bladder-urethral specimens were excised from halothane-anesthetized female rats and mounted at in vivo length within the experimental apparatus consisting of a tissue perfusion chamber, an adjustable fluid column, and a laser micrometer. Outer diameter measurements were made at proximal, mid, and distal axial locations in response to increases in intraluminal pressure and after addition of various muscle-responsive agents. Basal smooth muscle tone and regional variations in compliance were detected through pressure-diameter responses. Chemically evoked contractile responses were measured and correspond to regional compositions of intrinsic smooth and striated muscle components. The results presented illustrate the utility of this system, which should permit a more thorough characterization of structure-function relationships and urethral biomechanical function in relation to normal and dysfunctional tissue states.
机译:尽管其在尿液的储存和释放中具有主要的机械功能,但尿道的生物力学特性仍未得到充分开发。这项研究的目的是开发和验证一种可用于以这种方式评估整个尿道组织的实验模型。从氟烷麻醉的雌性大鼠中切除膀胱尿道标本,并以体内长度安装在由组织灌注室,可调液柱和激光测微仪组成的实验装置中。响应于腔内压力的增加以及在添加各种肌肉反应性药物后,在近端,中端和远端轴向位置进行了外径测量。通过压力-直径反应检测基础平滑肌张力和顺应性的区域变化。测量了化学诱发的收缩反应,并对应于固有的平滑和横纹肌成分的区域组成。给出的结果说明了该系统的实用性,该系统应允许更全面地表征与正常和功能失调的组织状态相关的结构功能关系和尿道生物力学功能。

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