摘要
目的利用指尖PPG信号,获取血流、血管及微循环等心血管动力学参数。方法提出由反射式传感器DCM03及血氧模拟前端AFE4490设计指尖脉搏采集系统,并对原始脉搏波信号进行滤波,最终采用去噪效果较好的4阶ChebyⅡ滤波器降噪。对降噪后的信号进行二次微分得到加速脉搏波,对两种不同的加速脉搏波分别计算脉搏波传导时间,最终建立脉搏波传导时间和血压的估算模型,并由此估算心搏输出量、心搏指数等其他心血管动力学参数。结果对30个测试对象进行系统测试实验,得到收缩压和舒张压标准值与测试值之间的相关系数分别为0.9845和0.9663,而心率、心脏指数及心搏指数的相关系数为0.9779、0.8463及0.8133。结论系统测试值与标准值之间相关性较好,可为心血管疾病预测的研究提供一定参考依据。
Objective To obtain cardiovascular dynamic parameters such as blood flow,blood vessel and microcirculation based on PPG signal of fingertip.Methods A fingertip pulse acquisition system was designed using the reflective sensor DCM03 and the blood oxygen simulation front-end AFE4490.The filtering of the original pulse signal was discussed.Then,a 4-order ChebyⅡfilter with better denoising effect was used to denoise the fingertip pulse.The acceleration pulse wave was obtained by the second differential of the denoised signal and two different kinds of acceleration pulse waves were calculated.Finally,the estimation model of pulse wave conduction time and blood pressure was established and from which other cardiovascular dynamic parameters such as the cardiac output and the cardiac index were estimated.Results The correlation coefficients between the systolic blood pressure and diastolic blood pressure were 0.9845 and 0.9663,and the correlation coefficients between the heart rate,cardiac index and stroke volume index were 0.9779,0.8463 and 0.8133,respectively.Conclusion Linear correlation between the measured values and the estimated values was obtained,which may provide reference for the research of cardiovascular disease prediction.
作者
甘永进
陈辉
赵地
李琼
郑金存
Gan Yongjin;Chen Hui;Zhao Di;Li Qiong;Zheng Jincun(School of Physics and Telecommunication Engineering,Yulin Normal University,Yulin Guangxi 537000,China;不详)
出处
《航天医学与医学工程》
CAS
CSCD
北大核心
2019年第6期523-530,共8页
Space Medicine & Medical Engineering
基金
广西高校中青年教师基础能力提升项目(2019KY0585)
玉林师范学院校级科研项目(2019YJKY07)
关键词
光电容积脉搏波
血压
心血管动力学参数
滤波器
加速脉搏波
传导时间
photoelectric volume pulse wave
blood pressure
cardiovascular dynamics parameters
filter
acceleration pulse wave
conduction time
