Skin-electrode impedance measurement during ECG acquisition: method's validation

LEONARDO CASAL; GUILLERMO LA MURA

Journal of Physics: Conference Series

IOP Publishing

Año: 2016 vol. 705

Skin-electrode impedance measurement can provide valuable information prior, during and post electrocardiographic (ECG) or electroencephalographic (EEG) acquisitions. In this work we validate a method for skin-electrode impedance measurement using test circuits with known resistance and capacitor values, at different frequencies for injected excitation current. Finally the method is successfully used for impedance measurement during ECG acquisition on a subject using 125 Hz and 6 nA square wave excitation signal at instrumentation amplifier input. The method can be used for many electrodes configuration.