呼吸气道流量与压力参数检测系统的电路设计  

CIRCUIT DESIGN FOR MEASURING AIRWAY FLOW AND PRESSURE PARAMETERS

作　　者：黄志伟[1] 叶继伦 

机构地区：[1]泸州医学院生物医学工程系医学工程技术教研室,四川泸州646000 [2]深圳迈瑞生物医疗电子股份有限公司

出　　处：《泸州医学院学报》2008年第1期57-60,共4页Journal of Luzhou Medical College

摘　　要：目的:设计一种压差式呼吸力学参数测量系统的硬件电路,可以检测病人呼吸气道压力和气体流量,实现对病人呼吸气道和呼吸机实时工作情况的监测。方法:利用流量传感器将呼吸气流引入到压力传感器,检测到病人气道的流量和压力电信号,再通过差分放大器和滤波发送到单片机系统进行计算,最后将这两个参数发送到监护仪或呼吸机用于参数和波形的显示。结果:流量同标准流量计的相对误差是8.43%,气道压力同呼吸机测试仪的相对误差是2.5%,都在系统规格设定的范围以内。结论:该电路监测的参数准确,显示波形细腻平滑,满足临床呼吸力学参数监测的功能和应用需要。Objective：To design the respiratory dynamic parameters measuring system for monitoring and displaying of airway flow and pressure.Methods：The airflow was introduced by flow sensor to the pressure sensor, then the patent＇s breath flow and airway pressure were measured. These two real-time signals were sent to MCU system for deducing the respiratory dynamic parameters by the inner processing. These parameters were transmitted to the monitor for the displaying of parameters and waveforms.Results：The relative error between the measured flow and standard flowmeter is 8.43%, and the relative error between the measured airway pressure and test meter of ventilator is 2.5%： these two errors were within the range set by the specification.COnClUSiOn ：The system was effective to detect the parameters and display the waveform exquisitely and smoothly, which met the function and application need of measuring the respiratory mechanics in clinic.

关 键 词：呼吸力学 高端监护仪 呼吸机 

分 类 号：R318.01[医药卫生—生物医学工程]