{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,10]],"date-time":"2026-04-10T18:31:49Z","timestamp":1775845909006,"version":"3.50.1"},"reference-count":28,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2014,7,21]],"date-time":"2014-07-21T00:00:00Z","timestamp":1405900800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>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.<\/jats:p>","DOI":"10.3390\/s140713088","type":"journal-article","created":{"date-parts":[[2014,7,21]],"date-time":"2014-07-21T11:43:19Z","timestamp":1405942999000},"page":"13088-13101","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":118,"title":["An Optical Fibre-Based Sensor for Respiratory Monitoring"],"prefix":"10.3390","volume":"14","author":[{"given":"Marek","family":"Krehel","sequence":"first","affiliation":[{"name":"Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Protection and Physiology, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland"},{"name":"ETH Zurich, Swiss Federal Institute of Technology, Department of Information Technology and Electrical Engineering, Gloriastrasse 35, 8092 Zurich, Switzerland"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5299-5885","authenticated-orcid":false,"given":"Michel","family":"Schmid","sequence":"additional","affiliation":[{"name":"Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Protection and Physiology, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0946-682X","authenticated-orcid":false,"given":"Ren\u00e9","family":"Rossi","sequence":"additional","affiliation":[{"name":"Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Protection and Physiology, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland"}]},{"given":"Luciano","family":"Boesel","sequence":"additional","affiliation":[{"name":"Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Protection and Physiology, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland"}]},{"given":"Gian-Luca","family":"Bona","sequence":"additional","affiliation":[{"name":"Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Protection and Physiology, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland"},{"name":"ETH Zurich, Swiss Federal Institute of Technology, Department of Information Technology and Electrical Engineering, Gloriastrasse 35, 8092 Zurich, Switzerland"}]},{"given":"Lukas","family":"Scherer","sequence":"additional","affiliation":[{"name":"Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Protection and Physiology, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland"}]}],"member":"1968","published-online":{"date-parts":[[2014,7,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"657","DOI":"10.5694\/j.1326-5377.2008.tb01825.x","article-title":"Respiratory rate: The neglected vital sign","volume":"188","author":"Cretikos","year":"2008","journal-title":"Med. 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