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Development of a capacitive bioimpedance measurement system
dc.contributor | Eilebrecht, Benjamin |
dc.contributor | Medrano, Guillermo |
dc.contributor.author | Gómez Abad, Daniel |
dc.date.accessioned | 2010-02-12T13:26:20Z |
dc.date.available | 2010-02-12T13:26:20Z |
dc.date.issued | 2009-08-24 |
dc.identifier.uri | http://hdl.handle.net/2099.1/8526 |
dc.description.abstract | Bioelectrical impedance spectroscopy (BIS) is a well-established and non-invasive method to determine and monitor body composition. Commercially available bioelectrical impedance systems use coated hydrogel-aluminium electrodes, where the hydrogel acts as an adhesive and as an electrolytic medium. The gel/adhesive is physiologically inert over short periods. However, when used over longer periods, hydrogel-aluminium electrodes present limitations, which capacitive electrodes may overcome. First measurements using capacitive electrodes have shown that commercial devices are not designed to work with these kind of electrodes. The presented high impedance, specially at low frequencies (e.g. 5kHz), presents a challenge for the current injection and therefore for the design of the current source. Within this project, a bioimpedance spectroscopy (BIS) system to perform measurements using capacitive electrodes has been developed. The system has been tested in the critical frequency range, namely in the lower frequency range (5 kHz - 43 kHz). Measurements have been performed using dummy electrical models, which simulate di erent values of skin and electrode impedance. The results obtained show the better performance of the device in comparison to a commercial device (Xitron Hydra 4200, Xitron Technologies) for that frequency range. An important item in this thesis has been the design of a multi-frequency current source able to perform measurements using capacitive electrodes. |
dc.language.iso | eng |
dc.publisher | Universitat Politècnica de Catalunya |
dc.subject | Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Circuits de microones, radiofreqüència i ones mil·limètriques |
dc.subject.lcsh | Impedance, Bioelectric |
dc.subject.lcsh | Nonlinear oscillations |
dc.subject.lcsh | Impedance (Electricity)--Measurement |
dc.subject.other | Bioimpedance spectroscopy |
dc.subject.other | Capacitive measurement |
dc.subject.other | Capacitive electrodes |
dc.subject.other | Multi-frequency |
dc.subject.other | Current source |
dc.title | Development of a capacitive bioimpedance measurement system |
dc.type | Master thesis |
dc.subject.lemac | Impedància (Electricitat) |
dc.subject.lemac | Freqüències de sistemes oscil·lants |
dc.subject.lemac | Mesurament -- Instruments |
dc.rights.access | Open Access |
dc.audience.educationlevel | Màster |
dc.audience.mediator | Escola Politècnica Superior de Castelldefels |