探索用计算流体动力学的尿管镜设计,以改善盆内压力
Carla Miguel1, Ashok Sangani2, Scott Wiener3
1Department of Urology, Upstate University Hospital, SUNY Upstate Medical University, 750 East Adams Street, Syracuse, NY, 13210, USA.
Urolithiasis
|September 14, 2023
概括
在尿路透镜检查期间最大限度地降低盆内压力,需要优化尿路透镜在尿路接入外内的放置. 将尿管镜置于离中心的位置显著增加了液体的流出,减少了潜在的并发症.
科学领域:
- 泌尿器科 泌尿器科 泌尿器科 泌尿器科
- 医疗器械 医疗器械
- 计算流体动力学的流体动力学.
背景情况:
- 在尿路透镜检查期间,高的盆腔内压力 (IPP) 与严重的并发症有关,如皮叶静脉逆流,出血和感染.
- 优化尿道镜和尿道接入罩 (UAS) 的配置对于提高尿道镜程序的安全性和有效性至关重要.
研究的目的:
- 在UAS中确定尿管镜的最佳截面和方向,以最大限度地减少IPP和最大限度地增加液体外流.
- 通过创建和测试旨在抵消尿道镜的原型无人机系统来验证这些发现.
主要方法:
- 计算流体动力学 (COMSOL) 模拟被用于在10 Fr UAS内建模四个具有相等横截面积的尿道镜.
- 通过将9.5Fr的柔性尿管镜置于12Fr的UAS中,使用单丝 suture,创建了一个UAS原型.
- 在标准和原型UAS配置之间比较了流体流量.
主要成果:
- 模拟显示,偏移圆形尿道镜与中心尿道镜相比,导致阻力减少41%,IPP降低,流量增加.
- 经过修改的UAS原型显示,与未经修改的UAS (30.0 mL/min) 相比,平均流量体积 (33.76 mL/min) 增加了12.5% (p < 0.05).
- 将尿管望远镜放置在UAS的侧壁上,可以最大限度地增加输出.
结论:
- 在圆形UAS中放置圆形尿管镜偏移将最大限度地提高液体流出.
- 设计用于抵消尿管镜的原型无人机系统实现了大量的输出流量增加,在尿管镜检查期间可能减少IPP.
- 这种偏移策略提供了一种提高流体动态的方法,而不影响工作道或流入.
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