侯殷伟 程云章 边俊杰

摘要：目前可穿戴式无创血压监测设备大多采用光电容积脉搏波描记法（PPG）信号进行血压监测，然而在运动过程中，PPG信号极易受运动伪影（Motion Artifacts）影响，从而大幅降低血压监测的准确性。近年来，基于PPG信号的运动过程血压实时估计成为研究热点。主要介绍PPG信号抗运动伪影技术研究进展，阐述PPC信号原理及噪声来源，并对现有PPG信号去噪算法原理与优缺点进行比较，最后分析运动伪影去除技术存在的问题及未来发展趋势。

关键词：运动伪影;血压估计;PPG信号;基线漂移

DOI： 10. 11907/rjdk.191753

开放科学（资源服务）标识码（OSID）：

中图分类号：TP312

文献标识码：A

文章编号：1672-7800（2020）004-0107-04

Research Progress of Motion Artifact Removal Algorithm Based on PPG Signal

HOU Qj-wej'， CHENG Yun-zhang'， BIAN Jun-jie1.2

（I.Sh.anghai Interventional Medical Device Engineering Technology Re.search Center . Univer.sity of Sha，zghaifor Science and

Technology， Shanghai 200093. China ; 2. Zhejiang .Shan.shi Medical In.strument Co.Ltd. ， Hangzhou 311100 . China ）Abstract： Currently ， wearahle non-invasive blood pressure monitoring devices are mostly based on photoplethysmography signals.However. during the movement. the PPG signal is highly susceptihle to motion artifacts. and the existing motion artifacts seriously in-terfere with the accuracy of blood pressure monitoring. In recent years. real-time estimation of' blood pressure based on PPG signalshas become a hot topic in current research. This paper mainly studies the research progress of PPG signal anti-motion artifact technolo-gy . The principle of PPG signal and the source of noise are expounded， and the principle， advantages and disadvantages of the existingPPG signal denoising algorithm are analyzed and compared. Finally， the problems existing in the motion artifact removal technologyand the f'uture development trends are analyzed.Key Words ： motion artifacts;blood pressure estimation ; PPG signal;baseline drift

O 引言

血壓（BP）是与高血压患者密切相关的生理指标，可作为重要参数用于发现早期心血管疾病。血压监测的准确性对于心血管疾病诊断具有重要价值…。无创连续血压监测能够反映人体血压变化规律，掌握血压变化率可以大幅降低高血压患者出现致命危险的概率[2]。同时，长期、连续的血压监测数据对于病患心血管状况的评估与诊断具有重要作用。近年来，使用可穿戴式设备监测血压的方式已得到了普及，由于成本较低，在这种设备中监测血压最常用的方法是使用光电容积脉搏波（PhotoPlethysmoGraphy，PPG）信号[3]。光电容积脉搏波描记法[4]是一种电光技术，其将传感器置于皮肤上方，通过发射绿光照亮皮肤表层，由传感器接收反射光强度变化，并通过对PPG信号的周期性检测与分析得到血压值。该方式能够克服传统血压测量的缺点，摆脱传统袖带带来的不适感，适用于连续血压监测。……