In non-invasive ventilation, continuous monitoring of respiratory volumes is essential. Here, we present a method for the measurement of respiratory volumes by a single fiber-grating sensor of bending and provide the proof-of-principle by applying a calibration-test measurement procedure on a set of 18 healthy volunteers. Results establish a linear correlation between a change in lung volume and the corresponding change in a local thorax curvature. They also show good sensor accuracy in measurements of tidal and minute respiratory volumes for different types of breathing. The proposed technique does not rely on the air flow through an oronasal mask or the observation of chest movement by a clinician, which distinguishes it from the current clinical practice.
Bibliographical note© 2014 Optical Society of America
This paper was published in Biomedical optics express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-5-4-1136. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Petrović, M. D., Petrovic, J., Daničić, A., Vukčević, M., Bojović, B., Hadžievski, L., ... Webb, D. J. (2014). Non-invasive respiratory monitoring using long-period fiber grating sensors. Biomedical Optics Express, 5(4), 1136-1144. https://doi.org/10.1364/BOE.5.001136