Lock-in measurement of bio-impedance variations

被引：37

作者：

Min, M ^{[1
]}

Märtens, O ^{[1
]}

Parve, T ^{[1
]}

机构：

[1] Tallinn Univ Technol, Dept Elect, EE-19086 Tallinn, Estonia

来源：

MEASUREMENT | 2000年 / 27卷 / 01期

基金：

欧盟地平线“2020”;

关键词：

lock-in measurement; electrical bio-impedance; synchronous demodulation;

D O I：

10.1016/S0263-2241(99)00048-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electrical impedance measured between suitably placed electrodes can give a reasonable amount of information about the basic physiological parameters of the patient's body and its organs and vital systems. High noise immunity of the lock-in demodulation technology allows one to obtain, from the bio-impedance variations, the signals corresponding to breathing and heart beating, even using the handles of the veloergometer or other similar equipment as the electrodes. From these signals it is possible to get not only simple physiological parameters like the breathing rate and heart rate, but also to derive more complex parameters like the tidal volume and minute volume of respiration, and stroke volume and cardiac output of the heart. The application specific integrated circuit (ASIC) has been designed for electrical bio-impedance measurements in portable and implantable equipment. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：21 / 28

页数：8

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