人体肺通气的主动机械模拟装置研究与设计

Development of an Active Mechanical Lung for Simulating Human Pulmonary Ventilation

目前,包括夹板肺在内的被动模拟肺是医院和厂家检测呼吸机性能的重要装置。但该类模拟肺所模拟的人体呼吸情况与实际情况相差较大,不能模拟人体主动呼吸的功能。为此,该研究设计了一款包括“模拟呼吸肌肉做功装置”“模拟胸腔”和“模拟呼吸道”在内的、能模拟人体肺通气功能的机械主动模拟装置:3D打印所设计的人体气道,并在气道末端连接左右气囊替代人体左右肺;控制电机驱动曲柄连杆机构带动活塞反复运动并输出交替变化的压力到“模拟胸腔”,产生自主呼吸气流流经“模拟呼吸道”。以模拟正常成人的呼吸为目标,设计实验平台测试验证了所设计的主动机械模拟装置产生的呼吸气流、气压与目标气流、气压一致。所设计的主动机械模拟装置将有利于呼吸机性能的检测。

At present,the passive simulated lung including the splint lung is an important device for hospitals and manufacturers in testing the functions of a respirator.However,the human respiration simulated by this passive simulated lung is quite different from the actual respiration.And it is not able to simulate the spontaneous breathing.Therefore,including"the device simulating respiratory muscle work","the simulated thorax"and"the simulated airway",an active mechanical lung to simulate human pulmonary ventilation was designed:3D printed human respiratory tract was developed and connected the left and right air bags at the end of the respiratory tract to simulate the left and right lungs of the human body.By controlling a motor running to drive the crank and rod to move a piston back and forth,and to deliver an alternating pressure in the simulated pleural,and so as to generate an active respiratory airflow in airway.The experimental respiratory airflow and pressure from the active mechanical lung developed in this study are consistent with the target airflow and pressure which collected from the normal adult.The developed active mechanical lung function will be conducive to improve the quality of the respirator.