基于时频域分析的连续波雷达心跳间隔和心率变异性非接触估计

IF 3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Hoang Thi Yen;Masaki Kurosawa;Tetsuo Kirimoto;Yukiya Hakozaki;Takemi Matsui;Guanghao Sun
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引用次数: 0

摘要

生命体征是健康状况的客观指标。心率变异性(HRV)是连续心跳间隔变化的生理现象,它比呼吸速率(RR)或心率(HR)携带更多的生理信息。医用雷达是非接触式生命体征监测的潜在传感器。然而,这种传感器需要一个更复杂的过程来提取HRV。利用基于局部投影降噪(LPNR)的非线性自适应滤波器和基于卷积的平滑滤波器从雷达信号中提取心跳分量。心跳组件仍然包含不希望出现的峰值;因此,利用导数函数检测斜率最大的峰,即期望的峰,然后进行r峰检测,得到HRV。为了评估该方法的性能,我们在18名健康受试者身上测试了该系统,并将该传感器测量的HRV与接触式心电图(ECG)测量的HRV进行了比较。结果表明:雷达HRV与心电HRV的相关性为97.43%;心跳间隔(IBI) 95%置信度为59.5 ms。此外,还将该方法应用于日本横滨医院住院患者的HRV变化监测。临床数据处理结果为护士日常检查提供了依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Non-Contact Estimation of Cardiac Inter-Beat Interval and Heart Rate Variability Using Time-Frequency Domain Analysis for CW Radar
Vital signs are objective indices of health status. Heart rate variability (HRV) is the physiological phenomenon of variation in interval between consecutive heartbeats, which carries more physiological information than respiration rate (RR) or heart rate (HR). Medical radar isa potential sensor for non-contact vital sign monitoring. However, this sensor requires a more complicated process for HRV extraction. In this study, the HRV was obtained as follows: The heartbeat component was extracted from the radar signal using a locally projected noise reduction (LPNR)-based nonlinear adaptive filter and a convolution-based smoothing filter. The heartbeat component still includes undesired peaks; therefore, a derivative function was used to detect the sharpest slope peak, which is the desired peak, followed by R-peak detection to obtain HRV. To evaluate the performance of the proposed method, we tested the system on 18 healthy subjects and compared the HRV determined by this sensor with that measured by contact-type electrocardiography (ECG). The results show a correlation of 97.43% between HRV by radar and HRV by ECG; the 95% confidence of inter-beat interval (IBI) is 59.5 ms. In addition, the proposed method was applied to monitor the change in HRV of an inpatient from Yokohama Hospital, Japan. The clinical data processing results provided consent for the nurse's daily check.
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来源期刊
CiteScore
5.80
自引率
9.40%
发文量
58
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