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Textrode functional straps for bioimpedance measurements-experimental results for body composition analysis
KTH, School of Technology and Health (STH), Medical sensors, signals and systems (MSSS).
KTH, School of Technology and Health (STH), Medical sensors, signals and systems (MSSS).ORCID iD: 0000-0002-6995-967X
KTH, School of Technology and Health (STH), Medical sensors, signals and systems (MSSS).
2013 (English)In: European Journal of Clinical Nutrition, ISSN 0954-3007, E-ISSN 1476-5640, Vol. 67, no SUPPL. 1, S22-S27 p.Article in journal (Refereed) Published
Abstract [en]

Background/Objectives:Functional garments for physiological sensing purposes have been used in several disciplines, that is, sports, firefighting, military and medicine. In most of the cases, textile electrodes (textrodes) embedded in the garment are used to monitor vital signs and other physiological measurements. Electrical bioimpedance (EBI) is a non-invasive and effective technology that can be used for the detection and supervision of different health conditions.EBI technology could make use of the advantages of garment integration; however, a successful implementation of EBI technology depends on the good performance of textrodes. The main drawback of textrodes is a deficient skin-electrode interface that produces a high degree of sensitivity to signal disturbances. This sensitivity can be reduced with a suitable selection of the electrode material and an intelligent and ergonomic garment design that ensures an effective skin-electrode contact area.Subjects/Methods:In this work, textrode functional straps for total right side EBI measurements for body composition are presented, and its measurement performance is compared against the use of Ag/AgCl electrodes. Shieldex sensor fabric and a tetra-polar electrode configuration using the ImpediMed spectrometer SFB7 in the frequency range of 3-500 kHz were used to obtain and analyse the impedance spectra and Cole and body composition parameters.Results:The results obtained show stable and reliable measurements; the slight differences obtained with the functional garment do not significantly affect the computation of Cole and body composition parameters.Conclusions:The use of a larger sensor area, a high conductive material and an appropriate design can compensate, to some degree, for the charge transfer deficiency of the skin-electrode interface.

Place, publisher, year, edition, pages
2013. Vol. 67, no SUPPL. 1, S22-S27 p.
Keyword [en]
Body composition, bioimpedance, textrodes, textile electrodes, Bioimpedance spectroscopy
National Category
Other Medical Engineering Medical Materials
Identifiers
URN: urn:nbn:se:kth:diva-107482DOI: 10.1038/ejcn.2012.161ISI: 000318689500005Scopus ID: 2-s2.0-84872161959OAI: oai:DiVA.org:kth-107482DiVA: diva2:576266
Note

QC 2013205

Available from: 2012-12-12 Created: 2012-12-12 Last updated: 2017-12-07Bibliographically 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.
Series
TRITA-STH : report, ISSN 1653-3836 ; 2012:6
Keyword
Bioimpedance, textrodes, textile electrodes, Impedance Cardiography, Body Composition
National Category
Medical Materials Medical Equipment Engineering
Identifiers
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)
Opponent
Supervisors
Note

QC 20121213

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

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Seoane, Fernando

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