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Characterizing Dry Electrodes Impedance by Parametric Modeling for Arm Wearable Long-term Cardiac Rhythm Monitoring

Bosnjak, A, Linares, P, McLaughlin, JAD and Escalona, OJ (2017) Characterizing Dry Electrodes Impedance by Parametric Modeling for Arm Wearable Long-term Cardiac Rhythm Monitoring. In: 44th Computing in Cardiology Conference, 2017, Rennes, France, Rennes, France. Computing in Cardiology, 2017. Vol 44 4 pp. [Conference contribution]

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URL: http://www.cinc.org

DOI: 10.22489/CinC.2016.301-506


There are cardiac patients requiring their ECG to be constantly monitored. The quality of long-term electrical activity feature measurements in the ECG may rely considerably on the electrodes and their long-term skin interface performance stability; thus, affecting the accuracy of clinical diagnosis and treatment. Particularly, misbehavior of the skin-electrode impedance (Zse) may cause a large degree of distortion in the ECG signal; therefore, it is important to analyze, characterize and provide a reliable modeling of any emerging dry electrode technology being used for longterm ECG monitoring. In this paper we present a useful methodology for modeling the Zse behavior. With the objective to obtain these parameters, we tested four methods for fitting curves: a) 1-time constant impedance of a circuit. b) 2-time constant impedance measurement.c) A fractional calculus with 1-time constant impedance, and d) A fractional calculus with 2-time constant impedance. As results we obtained that the 2-time constant circuit implementation of Zse using a fractional calculus proved to be best fitted to the phase plot measured with the Solartron analyzer.

Item Type:Conference contribution (Paper)
Keywords:ECG long term monitoring, dry electrodes, skin-electrode impedance, polyurethane, AgCl, 3-electrodes method, impedance spectroscopy, parametric modelling.
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:39013
Deposited By: Professor Omar Escalona
Deposited On:24 Apr 2018 07:41
Last Modified:24 Apr 2018 07:41

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