Ige Ebenezer Olubunmi, Adetunla Adedotun, Amudipe Samuel Olufemi, Adeoye Adeyinka, Glucksberg Matthew
Department of Biomedical Engineering, Afe Babalola University, Ado-Ekiti, Nigeria.
Department of Mechanical and Mechatronics Engineering, Afe Babalola University, Ado-Ekiti, Nigeria.
Heliyon. 2022 May;8(5):e09378. doi: 10.1016/j.heliyon.2022.e09378. Epub 2022 May 2.
Mechanical ventilator is a machine that is mechanically designed to deliver breathable air in and out of the lungs to provide a breathing mechanism for a patient who is physically unable to breathe, it is an indispensable life-support device in critical care medicine and medical emergencies such as scenarios during the COVID-19 pandemic. This research presents a model design of the pneumatic circuit that is electronically controlled, by using computer-aided pneumatic rig over selected 5/3, 5/2, 3/2 solenoid gating valves, the performance of these valves must be investigated to ascertain the most appropriate valve to be used for the electro-pneumatic mechanical ventilator. An elaborate parametric investigation reported for volume-controlled ventilators illustrate the influences of key parameters on the dynamics of the ventilated respiratory system. This study presents the linearity of tidal volume, peak pressure and lung compliance for the parameters considered. However, the maximum pressure of the ventilation device increases slowly when the tidal volumes exceed 600 ml. In addition, influence of evacuation time of the ventilator predicted over high throughput in time regimes of 1 s; 1.2 s; 1.4 s; 1.6 s, and 1.8 s showed that the pressure platform in the pipe might not appear if the exhaust time of the ventilator is less than 1.6 s. The 5/2 solenoid valve was considered the best with consistent flowrate. The archetypal model of the pneumatic circuit developed in this research could find vital application in the design of patient-interfacing devices particularly in ventilators and neonatal incubator.
机械通气机是一种通过机械设计使空气进出肺部，为身体无法自主呼吸的患者提供呼吸机制的机器，它是重症医学和医疗紧急情况（如新冠疫情期间的各种场景）中不可或缺的生命支持设备。本研究提出了一种电控气动回路的模型设计，通过使用计算机辅助气动装置，对选定的5/3、5/2、3/2电磁门阀进行研究，必须对这些阀门的性能进行调查，以确定最适合用于电动气动机械通气机的阀门。针对容量控制通气机进行的详细参数研究说明了关键参数对通气呼吸系统动力学的影响。本研究给出了所考虑参数的潮气量、峰值压力和肺顺应性的线性关系。然而，当潮气量超过600毫升时，通气装置的最大压力会缓慢增加。此外，在1秒、1.2秒、1.4秒、1.6秒和1.8秒的时间范围内，对通气机排气时间的预测影响表明，如果通气机的排气时间小于1.6秒，管道中可能不会出现压力平台。5/2电磁阀被认为是流量最稳定的最佳选择。本研究中开发的气动回路原型模型在患者接口设备的设计中，特别是在通气机和新生儿培养箱的设计中，可能会有重要应用。
