基于流量变化率阈值触发的便携式无创正压呼吸机系统设计  

Design of Portable Noninvasive Positive Pressure Ventilator System Based on Threshold Trigger of Flow Rate Change

作　　者：王鑫 袁勤[1] 牛航舵 叶继伦 袁智颖 WANG Xin;YUAN Qin;NIU Hangduo;YE Jilun;YUAN Zhiying(School of Life Science and Technology,University of Electronic Science and Technology of China,Chengdu,611731;School of Biomedical Engineering,Health Science Center,Shenzhen University,Shenzhen,518060;Guangdong BIOLIGHT Innovation Research Institute,Zhuhai,519080)

机构地区：[1]电子科技大学生命科学与技术学院,成都市611731 [2]深圳大学医学部生物医学工程学院,深圳市518060 [3]广东省宝莱特创新研究院,珠海市519080

出　　处：《中国医疗器械杂志》2023年第5期512-517,544,共7页Chinese Journal of Medical Instrumentation

摘　　要：为了有效治疗呼吸系统疾病,设计了一款无创正压呼吸机系统,提出了系统总体结构设计,并完成硬件搭建。采用流量变化率阈值触发方式对患者呼吸状态进行识别,其中流量变化率的计算通过最小二乘法实现。同时,根据流量-时间、压力-时间特性曲线实时计算呼吸参数。此外,还搭载了4种通气模式:持续控制通气、持续气道正压通气、双水平气道正压通气和压力支持通气。最后进行参数测量精度和通气模式设置测试。结果表明,该系统提供的关键呼吸参数计算符合相关标准,同时支持4种通气模式的稳定输出,可为患者提供呼吸治疗,满足呼吸机基本功能需求。In order to effectively treat respiratory diseases,a non-invasive positive pressure ventilator system is designed,the overall structure design of the system is proposed,and the hardware construction is completed.The breathing state of the patient is identified by the threshold triggering method of the flow rate of change,and the calculation of the flow rate of change is realized by the least squares method.At the same time,the breathing parameters are calculated in real time according to the flow-time and pressure-time characteristic curves.In addition,CMV,CPAP,BiPAP and PSV ventilation modes are also implemented.Finally,the parameter measurement accuracy and ventilation mode setting tests are carried out.The results show that the calculation of key breathing parameters provided by the system meets the relevant standards,and supports the stable output of 4 ventilation modes at the same time,provides breathing treatment for patients,and meets the basic functional requirements of the ventilator.

关 键 词：呼吸机 呼吸触发 参数计算 通气模式 

分 类 号：R197.39[医药卫生—卫生事业管理] TH77[医药卫生—公共卫生与预防医学]