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Comparison of dry-textile electrodes for electrical bioimpedance spectroscopy measurements
University of Borås. (Swedish School of Textiles)
KTH, School of Technology and Health (STH), Medical sensors, signals and systems (MSSS).
2010 (English)Conference paper (Refereed)
Abstract [en]

Textile Electrodes have been widely studied for biopotentials recordings, specially for monitoring the cardiac activity. Commercially available applications, such as Adistar T-shirt and Textronics Cardioshirt, have proved a good performance for heart rate monitoring and are available worldwide. Textile technology can also be used for Electrical Bioimpedance Spectroscopy measurements enabling home and personalized health monitoring applications however solid ground research about the measurement performance of the electrodes must be done prior to the development of any textile-enabled EBI application. In this work a comparison of the measurement performance of two different types of dry-textile electrodes and manufacturers has been performed against standardized RedDot 3M Ag/AgCl electrolytic electrodes. 4-Electrode, whole body, Ankle-to-Wrist EBI measurements have been taken with the Impedimed spectrometer SFB7 from healthy subjects in the frequency range of 3kHz to 500kHz. Measurements have been taken with dry electrodes at different times to study the influence of the interaction skin-electrode interface on the EBI measurements. The analysis of the obtained complex EBI spectra shows that the measurements performed with textile electrodes produce constant and reliable EBI spectra. Certain deviation can be observed at higher frequencies and the measurements obtained with Textronics and Ag/AgCl electrodes present a better resemblance. Textile technology, if successfully integrated it, may enable the performance of EBI measurements in new scenarios allowing the rising of novel wearable monitoring applications for home and personal care as well as car safety.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2010. Vol. 224, no 1
, Journal of Physics Conference Series, 224:1
National Category
Medical Laboratory and Measurements Technologies
URN: urn:nbn:se:kth:diva-73064DOI: 10.1088/1742-6596/224/1/012140ScopusID: 2-s2.0-77954666264OAI: diva2:488617
International Conference of Electrical Bioimpedance

QC 20120206

Available from: 2012-02-06 Created: 2012-02-01 Last updated: 2012-12-13Bibliographically approved
In thesis
1. Sensor-Based Garments that Enable the Use of Bioimpedance Technology: Towards PersonalizedHealthcare Monitoring.
Open this publication in new window or tab >>Sensor-Based Garments that Enable the Use of Bioimpedance Technology: Towards PersonalizedHealthcare Monitoring.
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Functional garments for physiological sensing purposes have been utilized in several disciplinesi.e. sports, firefighting, military and medical. In most of the cases textile electrodes (Textrodes)embedded in the garment are employed to monitor vital signs and other physiologicalmeasurements. Electrical Bioimpedance (EBI) is a non-invasive and effective technology that canbe used for detection and supervision of different health conditions. In some specific applicationssuch as body composition assessment EBIS has shown encouraging results proving good degreeof effectiveness and reliability. In a similar way Impedance Cardiography (ICG) is anothermodality of EBI primarily concerned with the determination of Stroke Volume SV, indices ofcontractility, and other aspects of hemodynamics.EBI technology in the previously mentioned modalities can benefit from a integration with agarment; however, a successful implementation of EBI technology depends on the goodperformance of textile electrodes. The main weakness of Textrodes is a deficient skin-electrodeinterface which produces a high degree of sensitivity to signal disturbances. This sensitivity canbe reduced with a suitable selection of the electrode material and an intelligent and ergonomicgarment design that ensures an effective skin-electrode contact area.This research work studies the performance of textile electrodes and garments for EBIspectroscopy for Total Body Assessment and Transthoracic Electrical Bioimpedance (TEB) forcardio monitoring. Their performance is analyzed based on impedance spectra, estimation ofparameters, influence of electrode polarization impedance Zep and quality of the signals using asreference Ag/AgCl electrodes. The study includes the analysis of some characteristics of thetextile electrodes such as conductive material, skin-electrode contact area size and fabricconstruction.The results obtained in this research work present evidence that textile garments with a dry skinelectrodeinterface like the ones used in research produce reliable EBI measurements in bothmodalities: BIS for Total Body Assessment and TEB for Impedance Cardiography. Textiletechnology, if successfully integrated, may enable the utilization of EBI in both modalities andconsequently implementing wearable applications for home and personal health monitoring.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2013. x, 70 p.
TRITA-STH : report, ISSN 1653-3836 ; 2012:6
Bioimpedance, textrodes, textile electrodes, Impedance Cardiography, Body Composition
National Category
Medical Materials Medical Equipment Engineering
urn:nbn:se:kth:diva-107493 (URN)978-91-7501-603-0 (ISBN)
Public defence
2013-01-16, 3-221, Alfred Nobels Allé 10, Flemingsberg, 14:40 (English)

QC 20121213

Available from: 2012-12-13 Created: 2012-12-12 Last updated: 2016-02-04Bibliographically approved

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