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在静脉外体膜氧化过程中动脉和排水管的流量能力:模拟模型

Avishka Wickramarachchi¹, Aidan J C Burrell^2,3, Patrick R Joyce²

¹Cardio-Respiratory Engineering and Technology Laboratory, Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, VIC, Australia.

|May 24, 2024

概括

较小的管和较低的流速可以在静脉外体膜氧化 (VA ECMO) 期间提供足够的支持. 动脉管的大小和全身血管阻力是关键因素,挑战了需要更大的管和高流量的需求.

科学领域:

心血管生理学心血管生理学
医疗设备工程医疗设备工程
临界护理医学临界护理医学

背景情况:

静脉脉外体膜氧化 (VA ECMO) 中的大管与增加的并发症有关.
较小的管能够提供足够的血液动力学支持的能力仍然不清楚.

研究的目的:

为了评估各种管大小和VA ECMO流速对血液动力学支的影响.
评估模拟疾病状态的表现,包括严重的左心室衰竭,高血压和低血压.

主要方法:

使用了一个带有模拟循环的VA ECMO电路.
在不同系统和肺血管阻力 (SVR/PVR) 下测试了动脉管 (13-21 Fr) 和排水管 (21-25 Fr).

主要成果:

一个15 Fr动脉和21 Fr排水结合实现了>4 L/min流量和81.1 mmHg的平均动脉压力.
系统性血管阻力显著影响所有测量参数;肺血管阻力影响最小.
较大的排水管只在与较大的动脉管配对时才能提高最大流量.

结论:

较小的管和较低的流速可以充分支持模拟患者在不同的血液动力学条件下.
动脉管大小和SVR是VA ECMO流量输送的关键决定因素.
这些发现挑战了大管和高流量的必要性,以获得有效的VA ECMO支持.

关键词:

在 ECPR ECPR 中.VA ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO ECMO 球管大小球管大小肢体缺血症肢体缺血症模拟的循环循环循环循环.返回管可以返回管.血管损伤是因为血管损伤.静脉管静脉管静脉管

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