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Optica, Biomedical Optics Express, 12(3), p. 3325, 2012

DOI: 10.1364/boe.3.003325

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A miniature optical breathing sensor

Journal article published in 2012 by Jinesh Mathew, Yuliya Semenova ORCID, Gerald Farrell ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We demonstrate a novel miniature optical breathing sensor based on an Agarose infiltrated photonic crystal fiber interferometer. The sensor detects the variation in relative humidity that occurs between inhaled and exhaled breath. The sensor interrogation system can determine the breathing pattern in real time and can also predict the breathing rate and the breathing status during respiration. The sensor is suitable for monitoring patients during a magnetic resonance imaging scan where use of sedatives and anesthetics necessitates breathing monitoring; electronic sensors are not suitable in such an environment and a visual observation of the patient's respiratory efforts is often difficult.