Sensor-Based Garments that Enable the Use of Bioimpedance Technology: Towards Personalized Healthcare Monitoring
2013 (English)Doctoral thesis, monograph (Other academic)
Functional garments for physiological sensing purposes have been utilized in several disciplines
i.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 physiological
measurements. Electrical Bioimpedance (EBI) is a non-invasive and effective technology that can
be used for detection and supervision of different health conditions. In some specific applications
such as body composition assessment EBIS has shown encouraging results proving good degree
of effectiveness and reliability. In a similar way Impedance Cardiography (ICG) is another
modality of EBI primarily concerned with the determination of Stroke Volume SV, indices of
contractility, and other aspects of hemodynamics.
EBI technology in the previously mentioned modalities can benefit from a integration with a
garment; however, a successful implementation of EBI technology depends on the good
performance of textile electrodes. The main weakness of Textrodes is a deficient skin-electrode
interface which 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.
This research work studies the performance of textile electrodes and garments for EBI
spectroscopy for Total Body Assessment and Transthoracic Electrical Bioimpedance (TEB) for
cardio monitoring. Their performance is analyzed based on impedance spectra, estimation of
parameters, influence of electrode polarization impedance Zep and quality of the signals using as
reference Ag/AgCl electrodes. The study includes the analysis of some characteristics of the
textile electrodes such as conductive material, skin-electrode contact area size and fabric
The results obtained in this research work present evidence that textile garments with a dry skinelectrode
interface like the ones used in research produce reliable EBI measurements in both
modalities: BIS for Total Body Assessment and TEB for Impedance Cardiography. Textile
technology, if successfully integrated, may enable the utilization of EBI in both modalities and
consequently implementing wearable applications for home and personal health monitoring.
Place, publisher, year, edition, pages
echnology and Health, KTH Royal Institute of Technology , 2013.
TRITA-STH : report, ISSN 1653-3836 ; 6
Engineering and Technology
IdentifiersURN: urn:nbn:se:hb:diva-3645Local ID: 2320/11963ISBN: 978-91-7501-603-0OAI: oai:DiVA.org:hb-3645DiVA: diva2:877035