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Title: Mechanism of pressure induced baseline shift in bioelectric signals measurement using wearable electrodes
Authors: Xu, P
Tao, X 
Liu, H
Wang, S
Issue Date: 2012
Source: Proceedings - IEEE-EMBS International Conference on Biomedical and Health Informatics: Global Grand Challenge of Health Informatics, BHI 2012, 2012, 6211726, p. 871-874
Abstract: In this paper, we present an objective evaluation method to study the pressure induced abrupt baseline shift in bioelectric signals measurement using textile electrodes. The evaluation was carried out on a hollow simulator, made from a Teflon tube with two pieces of filtration membranes at each end to mimic human skin, which filled with saline solution. An electrode pair was set to contact with the membranes under controllable pressure. The baseline of bioelectric signals, indicated by open circuit potential (OCP) of the electrode pair, was continuously recorded when increasing the electrode-membrane contact pressure stepwise. Electrochemical impedances of the electrode pair were also measured at each pressure step. The results shown that the OCP and impedance decreased with electrode contact pressure. Mechanism of the abrupt baseline shift was analyzed using a capacitor model which well explained this phenomenon.
ISBN: 9781457721779
DOI: 10.1109/BHI.2012.6211726
Description: IEEE-EMBS International Conference on Biomedical and Health Informatics, BHI 2012. In Conj. with the 8th Int. Symp.on Medical Devices and Biosensors and the 7th Int. Symp. on Biomedical and Health Engineering, Hong Kong and Shenzhen, 2-7 January 2012
Appears in Collections:Conference Paper

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