Removing respiratory artefacts from transthoracic bioimpedance spectroscopy measurements

Cuba-Gyllensten, IllaphaKTH,Skolan för teknik och hälsa (STH),Philips Research Europe, High Tech. Campus 34, 5656AE, Eindhoven, Netherlands; ACTLab., Signal Processing Systems, TU Eindhoven, 5600MB Eindhoven, Netherlands (author)

QC 20131209
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.

TEKNIK OCH TEKNOLOGIER Medicinteknik Annan medicinteknik hsv//swe
ENGINEERING AND TECHNOLOGY Medical Engineering Other Medical Engineering hsv//eng
Air
Artificial intelligence
Electric impedance
Electric impedance tomography
Parameter estimation
Patient monitoring
Textiles

Abtahi, FarhadPhilips Research Europe, High Tech. Campus 34, 5656AE, Eindhoven, Netherlands(Swepub:kth)u17ajigh (author)
Bonomi, Alberto Giovanni.KTH,Skolan för teknik och hälsa (STH)(Swepub:kth)PI000000 (author)
Lindecrantz, KajKTH,Medicinska sensorer, signaler och system,University of Borås, Sweden(Swepub:kth)u1kuwno6 (author)
Seoane, FernandoKTH,Medicinska sensorer, signaler och system,Karolinska Institute, Sweden(Swepub:kth)u1rc29r4 (author)
Amft, O.ACTLab., Signal Processing Systems, TU Eindhoven, 5600MB Eindhoven, Netherlands (author)
KTHSkolan för teknik och hälsa (STH) (creator_code:org_t)

In:XV International Conference on Electrical Bio-Impedance (ICEBI) & XIV Conference on Electrical Impedance Tomography (EIT): Institute of Physics Publishing (IOPP)

By the author/editor: Cuba-Gyllensten, ...; Abtahi, Farhad; Bonomi, Alberto ...; Lindecrantz, Kaj; Seoane, Fernando; Amft, O.

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Medical Engineer ...; and Other Medical En ...

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