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首页> 外文期刊>Journal of the mechanical behavior of biomedical materials >A catheter friction tester using balance sensor: Combined evaluation of the effects of mechanical properties of tubing materials and surface coatings
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A catheter friction tester using balance sensor: Combined evaluation of the effects of mechanical properties of tubing materials and surface coatings

机译：使用平衡传感器的导管摩擦测试仪：结合管道材料和表面涂层机械性能影响的综合评价

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In this study, we introduce a new experimental approach to characterize the forces emerging from simulated catherization. This setup allows for a linear translation of urinary catheters in vertical direction as controlled by an actuator. By employing silicone-based elastomer with a duct of comparable diameter with catheters as urethra model, sliding contacts during the translation of catheters along the duct is generated. A most unique design and operation feature of this setup is that a digital balance was employed as the sensor to detect emerging forces from simulated catherization. Moreover, the possibility to give a variation in environment (ambient air vs. water), clearance, elasticity, and curvature of silicone-based urethra model allows for the detection of forces arising from diverse simulated catherization conditions. Two types of commercially available catheters varying in tubing materials and surface coatings were tested together with their respective uncoated catheter tubing. The first set of testing on the catheter samples showed that this setup can probe the combined effect from flexural strain of bulk tubing materials and slipperiness of surface coatings, both of which are expected to affect the comfort and smooth gliding in clinical catherization. We argue that this new experimental setup can provide unique and valuable information in preclinical friction testing of urinary catheters.
机译：在这项研究中，我们介绍了一种新的实验方法来表征模拟背心的力量。该设置允许在垂直方向上线性平移，垂直方向由执行器控制。通过使用具有与导管的可比直径的硅氧烷基弹性体作为尿道模型，产生沿着管道的导管翻译过程中的滑动触点。该设置的最独特的设计和操作特征是使用数字平衡作为传感器，以检测来自模拟背心的新兴力。此外，在基于硅氧烷的尿道模型的环境（环境空气与水），间隙，弹性和曲率的可能性允许检测不同模拟的背心条件引起的力的可能性。两种类型的市售导管在管材材料和表面涂层中改变，与它们各自的未涂覆的导管管进行测试。在导管样品上的第一组测试表明，该设置可以探测来自散装管材料的弯曲菌株和表面涂层的光滑的组合效果，这两者都预期会影响临床背心的舒适性和光滑滑动。我们认为，这种新的实验设置可以在尿道导管的临床前摩擦测试中提供独特和有价值的信息。

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