自动闭环机械通气控制器的设计

Design of a closed-loop automatic mechanical ventilation controller

目的:设计一种自动闭环机械通气控制器,为改变临床机械通气治疗过程中,通气参数依靠医生个人经验判断进行设定的现状。方法:针对闭环控制系统要求,设计两个闭环控制子系统:维持呼气末二氧化碳(PETCO2)浓度的PETCO2控制系统和调节呼吸弹性的呼气末正压(PEEP)控制系统。PETCO2控制系统既可以独立工作也能够与PEEP控制系统联合工作。结果:实现了患者PETCO2和呼吸弹性水平的闭环自动控制。结论:自动闭环机械通气控制器可在维持必要通气的基础上,降低呼吸弹性,提高了临床呼吸治疗效果和质量。

Objective：In the clinical mechanical ventilation practice, the medical workers often set the ventilator parameters only depend on their own experience. In order to change that,we design a Closed-Loop Automatic Mechanical Ventilation Controller.Methods： Design two closed-loop control subsystems to meet the requirements of closed-loop control system. PETCO2 control subsystem used to keep the concentration of PETCO2, and another subsystem design to regulate the respiratory elasticity called PEEP control subsystem. PETCO2 control subsystem can work on its own or work with PEEP control subsystem.Results： Using this closed-loop controller, the partial CO2 pressure and respiratory elasticity of patient was regulated in real time.Conclusion：By using this closed-loop automatic mechanical ventilation controller, the respiratory elasticity was largely reduced with the adequate gas exchange. Therefore, the ventilator using this closed-loop automatic mechanical ventilation controller can improve the ventilation quality and also reduce the risk of lung injury.