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机械通气机的设计与仿真

Design and simulation of mechanical ventilators.

作者信息

El-Hadj Abdellah, Kezrane Mohamed, Ahmad Hijaz, Ameur Houari, Bin Abd Rahim S Zamree, Younsi Abdelhakime, Abu-Zinadah Hanaa

机构信息

Laboratory of Mechanics, Physics, Mathematical modeling (LMP2M), University of Medea, Medea, Algeria.

Department of Basic Sciences,University of Engineering and Technology, Peshawar, Pakistan.

出版信息

Chaos Solitons Fractals. 2021 Sep;150:111169. doi: 10.1016/j.chaos.2021.111169. Epub 2021 Jun 25.

DOI:10.1016/j.chaos.2021.111169
PMID:34188366
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8226155/
Abstract

During this period of COVID-19 pandemic, the lack of medical equipment (like ventilators) leads to complications arising in the medical field. A low-cost ventilator seems to be an alternative substitute to fill the lacking. This paper presents a numerical analysis for predicting the delivered parameters of a low-cost mechanical ventilator. Based on several manufactured mechanical ventilators, two proposed designs are investigated in this study. Fluid-structure interaction (FSI) analysis is used for solving any problems with the first design, and computational fluid dynamic (CFD) analysis with moving boundary is used for solving any issues with the second design. For this purpose, ANSYS Workbench platform is used to solve the set of equations. The results showed that the Ambu-bag-based mechanical ventilator exhibited difficulties in controlling ventilation variables, which certainly will cause serious health problems such as barotrauma. The mechanical ventilator based on piston-cylinder is more satisfactory with regards to delivered parameters to the patient. The ways to obtain pressure control mode (PCM) and volume control mode (VCM) are identified. Finally, the ventilator output is highly affected by inlet flow, length of the cylinder, and piston diameter.

摘要

在新冠疫情期间，医疗设备（如呼吸机）的短缺导致医疗领域出现并发症。一种低成本呼吸机似乎是填补这一缺口的替代选择。本文对一种低成本机械呼吸机的输送参数预测进行了数值分析。基于几种已制造的机械呼吸机，本研究对两种提议的设计进行了研究。流固耦合（FSI）分析用于解决第一种设计的任何问题，带有移动边界的计算流体动力学（CFD）分析用于解决第二种设计的任何问题。为此，使用ANSYS Workbench平台来求解方程组。结果表明，基于复苏球囊的机械呼吸机在控制通气变量方面存在困难，这肯定会导致严重的健康问题，如气压伤。基于活塞-气缸的机械呼吸机在向患者输送参数方面更令人满意。确定了获得压力控制模式（PCM）和容积控制模式（VCM）的方法。最后，呼吸机输出受进气流量、气缸长度和活塞直径的影响很大。

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