Removing respiratory artefacts from transthoracic bioimpedance spectroscopy measurements

I. Cuba-Gyllensten, F. Abtahi, A. G. Bonomi, K. Lindecrantz, F. Seoane, O. Amft

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Abstract

Transthoracic impedance spectroscopy (TIS) measurements from wearable textile electrodes provide a tool to remotely and non-invasively monitor patient health. However, breathing and cardiac processes inevitably affect TIS measurements, since they are sensitive to changes in geometry and air or fluid volumes in the thorax. This study aimed at investigating the effect of respiration on Cole parameters extracted from TIS measurements and developing a method to suppress artifacts. TIS data were collected from 10 participants at 16 frequencies (range: 10 kHz - 1 MHz) using a textile electrode system (Philips Technologie Gmbh). Simultaneously, breathing volumes and frequency were logged using an electronic spirometer augmented with data from a breathing belt. The effect of respiration on TIS measurements was studied at paced (10 and 16 bpm) deep and shallow breathing. These measurements were repeated for each subject in three different postures (lying down, reclining and sitting). Cole parameter estimation was improved by assessing the tidal expiration point thus removing breathing artifacts. This leads to lower intra-subject variability between sessions and a need for less measurements points to accurately assess the spectra. Future work should explore algorithmic artifacts compensation models using breathing and posture or patient contextual information to improve ambulatory transthoracic impedance measurements.

Original languageEnglish
Article number012018
JournalJournal of Physics: Conference Series
Volume434
Issue number1
DOIs
Publication statusPublished - 1 Jan 2013
Event15th International Conference on Electrical Bio-Impedance, ICEBI 2013 and 14th Conference on Electrical Impedance Tomography, EIT 2013 - Heilbad Heiligenstadt, Germany
Duration: 22 Apr 201325 Apr 2013

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    Cuba-Gyllensten, I., Abtahi, F., Bonomi, A. G., Lindecrantz, K., Seoane, F., & Amft, O. (2013). Removing respiratory artefacts from transthoracic bioimpedance spectroscopy measurements. Journal of Physics: Conference Series, 434(1), [012018]. https://doi.org/10.1088/1742-6596/434/1/012018