Direction sensitive sensor probe for the evaluation of voluntary and reflex pelvic floor contractions
Direction sensitive sensor probe for the evaluation of voluntary and reflex pelvic floor contractions
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DOI：
10.1002/nau.20263
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发表时间：
2007-01-01
影响因子：
2
通讯作者：
Omata, Sadao
中科院分区：
文献类型：
--
作者：
Constantinou, Christos E.;Omata, Sadao
目的：介绍一种用于评价盆底功能的阴道探头的研制。这种探头设计的基本标准包括一种评估关闭阴道的等渗力是否均匀分布或它们在某些方向上是否比其他方向更大的方法。本研究的目的是设计一种定向敏感的多传感器探头，具有周向空间分辨率，用于识别盆底自主收缩和反射性收缩后作用于阴道的各向异性力的分布。材料和方法：探头系统由安装在钢板弹簧上的四对力/位移传感器组成，能够对自主和反射收缩进行等张测量。组件可伸缩至23 mm以供插入，并可扩展至60 mm以用于测量。同时测量力和位移，传感器位于阴道前/后和左/右方向。使用该探头进行测量，以确定阴道壁的时间和空间特征反应。对9名平均年龄为的受试者的自愿盆底收缩和咳嗽引起的收缩的数据进行了分析。结果：研制了一套坚固的探头系统，并成功地进行了测量。初步结果显示，最大的力和位移发生在阴道前部的反射性收缩中，证实了作用在阴道壁上的力的各向异性。数据还显示，咳嗽所产生的力和位移都比自愿的盆底收缩幅度更大。结论：已研制出一种定向多传感器阴道探头，用于评估盆底等张收缩时产生的力和位移。对结果的分析提供了新的生物力学数据，表明盆底收缩导致阴道闭合的各向异性。
Aims: The development of a vaginal probe for the evaluation of the dynamics of pelvic floor function is described. Fundamental criteria in the design of this probe involves the incorporation of a means of assessing whether the isotonic forces closing the vagina are equally distributed or whether they are greater in some directions than others. The aim of this study is to present the design of directionally sensitive multi-sensor probe, having circumferential spatial resolution, constructed to identify the distribution of anisotropic forces acting on the vagina following voluntary and reflex pelvic floor contractions. Materials and Methods: Probe system consists of four pairs of force/displacement sensors mounted on leaf springs enabling isotonic measurements of voluntary and reflex contractions. Assembly is retractable to 23 mm for insertion, and expandable to 60 mm for measurement. Simultaneous measurements were made of force and displacement with the sensors oriented in the anterior/posterior and left/right orientation of the vagina. Using this probe, measurements were carried out to identify the temporal and spatial characteristic response of the vaginal wall. Data were analyzed with respect to voluntary pelvic floor and cough-induced contractions of nine subjects having a mean age of 64 years. Results: A robust probe system was developed and measurements were successfully made. Initial results show that the maximum force and displacement occurs during reflex contractions in the anterior aspect of the vagina validating the anisotropic nature of the forces acting on the vaginal wall. The data also show that both the force and displacement produced by the cough-induced has a higher magnitude than voluntary pelvic floor contraction. Conclusions: A directional multi-sensor vaginal probe has been developed to evaluate the force and displacement produced during isotonic pelvic floor contractions. Analysis of the results provided new biomechanical data demonstrating the anisotropic nature of vaginal closure as a consequence of pelvic floor contractions.