一种袖带波动信号无失真提取的方法  

A Method to Detect Pulsating Signals from a Cuff Without Distortion

作　　者：赵富强[1] 任朝晖[1] 

机构地区：[1]首都医科大学生物医学工程系,100054

出　　处：《北京生物医学工程》2001年第2期106-108,共3页Beijing Biomedical Engineering

基　　金：北京市科技新星培养计划资助

摘　　要：对人体生理信号进行无失真提取是生物医学测量领域的一个重要研究内容 ,这种无失真的信号是后续进行信号分析和处理的重要基础。在波动法血压无创测量技术中 ,袖带内的压力信号是由变化范围很大的由于放气造成的斜坡信号和袖带下由于动脉波动造成的较小的波动信号叠加而成。在传统方法中 ,为了通过袖带压力的变化提取动脉波动信号 ,采用了滤波技术 ,这种方法将低频的斜坡信号滤除的同时 ,也将波动信号的部分成分滤掉 ,因此造成了提取的波动信号的失真 ,严重影响了后续信号处理方法的发展。本文介绍了一种将模拟电路和数字电路结合的用于无失真提取袖带波动信号的方法。经实验 ,该方法能够无失真地提取袖带波动信号 ,从而为对袖带波动信号进行更深入的后续分析打下了基础。It is an important research topic to get physiological signal precisely and undistorted in biomedical measurement. For noninvasive oscillometric blood pressure measuring technique, the pressure signal in a cuff is composed of the ramp signal due to deflation and the pulsating signal due to artery pulsating underneath. The pulsating signal needs to be analyzed to estimate BP. But traditionally when using high-pass filter to remove the ramp to get the pulsating signal, the resulting signal gets distorted very much, because along with the filtering off ramp signal of low frequency, part of pulsating signal is also filtered off. Thus, Later on signal processing and analysis are restricted. Here in this paper we present an idea to obtain the pulsating signals undistorted. This would be a basic work to improve the traditional oscillometric technique.

关 键 词：信号提取 袖带 流动信号 提取 人体生理信号 

分 类 号：R318.04[医药卫生—生物医学工程] R33[医药卫生—基础医学]