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In this context, a novel sensing method to monitor simultaneously the heartbeat and respiratory rate signals of patients within an electrically safety environment was developed and tested. An optical fiber-based sensor was used in order to detect two optical phenomena. Photo-plethysmography and the relation between bending radius and attenuation of optical fiber were coupled through a single beam light traveling along this fiber.<\/jats:p>","DOI":"10.3390\/s141121523","type":"journal-article","created":{"date-parts":[[2014,11,17]],"date-time":"2014-11-17T03:15:21Z","timestamp":1416194121000},"page":"21523-21534","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["Electrically Insulated Sensing of Respiratory Rate and Heartbeat Using Optical Fibers"],"prefix":"10.3390","volume":"14","author":[{"given":"Ernesto","family":"Suaste-G\u00f3mez","sequence":"first","affiliation":[{"name":"Electrical Engineering Department, Bioelectronics Section, Centro de Investigaci\u00f3n y de Estudios Avanzados del IPN, Av. IPN 2508, Col. 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