Electrical characterisation of dry microneedle electrodes for portable bio-potential recording applications

Electrically stable electrodes are required for personal healthcare monitoring systems in order to monitor vital parameters without affecting patient lifestyle. This paper presents the electrical characterization of MEMS-based microneedle electrodes for surface bio-potential recording. Electrical measurements are presented for the impedance and DC offset of the electrodes and typical bio-potential signal (ECG, EMG) recordings are illustrated using the electrodes. These results demonstrate the suitability of the new electrodes for long-term wearable recording applications.