A practical approach to electrode-skin impedance unbalance measurement

Author

Spinelli, Enrique M. ; Mayosky, Miguel A. ; Pallás-Areny, Ramon

Author_Institution

Fac. de Ingenieria, Univ. Nacional de La Plata, Argentina

Volume

53

Issue

7

fYear

2006

fDate

7/1/2006 12:00:00 AM

Firstpage

1451

Lastpage

1453

Abstract

Unbalance between electrode-skin impedances is a major problem in biopotential recordings, leading to increased power-line interference. This paper proposes a simple, direct method to measure that unbalance at power-line frequency (50-60 Hz), thus allowing the determination of actual recording conditions for biopotential amplifiers. The method is useful in research, amplifier testing, electrode design and teaching purposes. It has been experimentally validated by using both phantom impedances and real electrode-skin impedances.

Keywords

bioelectric phenomena; biomedical electrodes; biomedical measurement; electric impedance; skin; 50 to 60 Hz; biopotential amplifiers; biopotential recording; electrode-skin impedance unbalance measurement; phantom impedances; power-line interference; Biomedical measurements; Electrodes; Electromagnetic interference; Frequency measurement; Impedance measurement; Instruments; Power amplifiers; Power measurement; Testing; Voltage; Biopotential amplifier; electrode-skin impedance; power-line interference; Amplifiers; Artifacts; Electric Impedance; Electricity; Electrodes; Equipment Design; Equipment Failure Analysis; Reproducibility of Results; Sensitivity and Specificity; Skin Physiology;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/TBME.2006.875714

Filename

1643419