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Sensors 2014, 14(7), 13088-13101; doi:10.3390/s140713088
Article

An Optical Fibre-Based Sensor for Respiratory Monitoring

1,2
,
1
,
1
,
1,* , 1,2
 and
1
1 Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Protection and Physiology, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland 2 ETH Zurich, Swiss Federal Institute of Technology, Department of Information Technology and Electrical Engineering, Gloriastrasse 35, 8092 Zurich, Switzerland
* Author to whom correspondence should be addressed.
Received: 29 April 2014 / Revised: 29 April 2014 / Accepted: 15 July 2014 / Published: 21 July 2014
(This article belongs to the Special Issue Biomedical Sensors and Systems)
View Full-Text   |   Download PDF [1031 KB, 23 July 2014; original version 21 July 2014]   |   Browse Figures

Abstract

In this paper, a textile-based respiratory sensing system is presented. Highly flexible polymeric optical fibres (POFs) that react to applied pressure were integrated into a carrier fabric to form a wearable sensing system. After the evaluation of different optical fibres, different setups were compared. To demonstrate the feasibility of such a wearable sensor, the setup featuring the best performance was placed on the human torso, and thus it was possible to measure the respiratory rate. Furthermore, we show that such a wearable system enables to keep track of the way of breathing (diaphragmatic, upper costal and mixed) when the sensor is placed at different positions of the torso. A comparison of the results with the output of some commercial respiratory measurements devices confirmed the utility of such a monitoring device.
Keywords: breathing monitoring; fibre optic sensing; respiratory rate; medical textiles; photonic textiles; technical textiles breathing monitoring; fibre optic sensing; respiratory rate; medical textiles; photonic textiles; technical textiles
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Krehel, M.; Schmid, M.; Rossi, R.M.; Boesel, L.F.; Bona, G.-L.; Scherer, L.J. An Optical Fibre-Based Sensor for Respiratory Monitoring. Sensors 2014, 14, 13088-13101.

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