Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/195181
Title: An easy-to-use hand-to-hand impedance-based sensor to obtain carotid pulse arrival time
Author: Hernández Urrea, Marc
Casanella, Ramon
Javierre Garcés, Casimiro F.
Casas, Octavi
Keywords: Electrocardiografia
Aparells i instruments mèdics
Tonometria
Elèctrodes
Pols (Fisiologia)
Electrocardiography
Medical instruments and apparatus
Tonometry
Electrodes
Pulse
Issue Date: Jan-2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Abstract: Pulse arrival times (PATs) are time intervals between the electrocardiogram (ECG) and an arterial pulse wave (APW) widely used to obtain cuffless blood pressure (BP). Although some distal APWs can be easily measured using, for example, a photoplethysmography (PPG) sensor on a finger, proximal APWs, such as the one of the carotid in the neck, are much more difficult to obtain for unskilled users. To overcome this, we propose an impedance-based sensor using only two electrodes in contact with each upper extremity (one to inject current and one to measure voltage at each hand or wrist), which can measure both ECG and an APW [an impedance plethysmogram, (IPG)] to obtain the PAT. Since the injected current flows from hand to hand across the upper torso, we hypothesize that the measured IPG should be sensitive to the arrival of the APW near the heart and, therefore, that the obtained PAT could be used as a surrogate of a proximal PAT even when measured on the hands. We have verified this by comparing the hand-to-hand impedance PAT obtained with the sensor with a gold-standard proximal PAT obtained in the carotid by tonometry in a cohort of 84 volunteers aged 20-61 years, showing a correlation of r=0.90 between the two. These results support the feasibility of future inclusion of these proximal PAT measurements in easy-to-use devices to obtain cuffless BP or other cardiovascular information with improved performance by nonspecialist users outside clinical settings.
Note: Versió postprint del document publicat a: https://doi.org/10.1109/JSEN.2022.3232985
It is part of: IEEE Sensors Journal, 2023, vol. 23, num. 5
URI: http://hdl.handle.net/2445/195181
Related resource: https://doi.org/10.1109/JSEN.2022.3232985
ISSN: 1530-437X
Appears in Collections:Articles publicats en revistes (Ciències Fisiològiques)

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