Mechanism of pressure induced baseline shift in bioelectric signals measurement using wearable electrodes

Pengjun Xu, Xiaoming Tao, Hao Liu, Shanyuan Wang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

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.
Original languageEnglish
Title of host publicationProceedings - IEEE-EMBS International Conference on Biomedical and Health Informatics
Subtitle of host publicationGlobal Grand Challenge of Health Informatics, BHI 2012
Pages871-874
Number of pages4
DOIs
Publication statusPublished - 30 Jul 2012
EventIEEE-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, Hong Kong
Duration: 2 Jan 20127 Jan 2012

Conference

ConferenceIEEE-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
CountryHong Kong
CityHong Kong and Shenzhen
Period2/01/127/01/12

ASJC Scopus subject areas

  • Biomedical Engineering
  • Health Informatics

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