Electro-resistive bands for non-invasive cardiac and respiration monitoring, a feasibility study. (14th January 2015)

• Record Type: Journal Article
• Authors: Gargiulo, Gaetano D; O'Loughlin, Aiden; Breen, Paul P
• Is Part Of: Physiological measurement. Volume 36:Number 2(2015:Feb.)
• Page Start: N35
• Page End: N49
• Publication Date: 2015-01-14
• Subjects: electrode-less cardiac monitor -- lung volume monitoring -- non-invasive long-term monitoring -- tidal volume monitoring -- cardiac output monitoring; Physiology -- Measurement -- Periodicals; Patient monitoring -- Periodicals; 612
• DOI: 10.1088/0967-3334/36/2/N35
• Languages: English
• ISSNs: 0967-3334

Abstract

Abstract: Continuous unobtrusive monitoring of tidal volume, particularly for critical care patients (i.e. neonates and patients in intensive care) during sleep studies and during daily activities, is still an unresolved monitoring need. Also a successful monitoring solution is yet to be proposed for continuous non-invasive cardiac stroke volume monitoring that is a novel clinical need. In this paper we present the feasibility study for a wearable, non-invasive, non-contact and unobtrusive sensor (embedded in a standard T-shirt) based on four electro-resistive bands that simultaneously monitors tidal volume and cardiac stroke volume changes. This low power sensor system (requires only 100 mW and accepts a wide power supply range up to ±18 V); thus the sensor can be easily embedded in existing wearable solutions (i.e. Holter monitors). Moreover, being contactless, it can be worn over bandages or electrodes, and as it does not rely over the integrity of the garment to work, it allows practitioners to perform procedures during monitoring. For this preliminary evaluation, one subject has worn the sensor over the period of 24 h (removing it only to shower); the accuracy of the tidal volume tested against a portable spirometer reported a precision of ±10% also during physical activity; accuracy tests for cardiac output (as it may require invasive procedure) have not been carried out in this preliminary trial.