Title :
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
fDate :
7/1/2006 12:00:00 AM
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;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2006.875714
