{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T15:47:30Z","timestamp":1785772050650,"version":"3.56.0"},"reference-count":16,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2019,11,21]],"date-time":"2019-11-21T00:00:00Z","timestamp":1574294400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["JP16H01805"],"award-info":[{"award-number":["JP16H01805"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100009035","name":"Program on Open Innovation Platform with Enterprises, Research Institute and Academia","doi-asserted-by":"publisher","award":["JPMJOP1722"],"award-info":[{"award-number":["JPMJOP1722"]}],"id":[{"id":"10.13039\/501100009035","id-type":"DOI","asserted-by":"publisher"}]},{"name":"General Research Fund Project","award":["PolyU 152207\/18E"],"award-info":[{"award-number":["PolyU 152207\/18E"]}]},{"name":"PolyU Central Grant project","award":["1-ZVGB"],"award-info":[{"award-number":["1-ZVGB"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Fiber Bragg grating (FBG) sensors fabricated in silica optical fiber (Silica-FBG) have been used to measure the strain of human arteries as pulse wave signals. A variety of vital signs including blood pressure can be derived from these signals. However, silica optical fiber presents a safety risk because it is easily fractured. In this research, an FBG sensor fabricated in plastic optical fiber (POF-FBG) was employed to resolve this problem. Pulse wave signals were measured by POF-FBG and silica-FBG sensors for four subjects. After signal processing, a calibration curve was constructed by partial least squares regression, then blood pressure was calculated from the calibration curve. As a result, the POF-FBG sensor could measure the pulse wave signals with an signal to noise (SN) ratio at least eight times higher than the silica-FBG sensor. Further, the measured signals were substantially similar to those of an acceleration plethysmograph (APG). Blood pressure is measured with low error, but the POF-FBG APG correlation is distributed from 0.54 to 0.72, which is not as high as desired. Based on these results, pulse wave signals should be measured under a wide range of reference blood pressures to confirm the reliability of blood pressure measurement uses POF-FBG sensors.<\/jats:p>","DOI":"10.3390\/s19235088","type":"journal-article","created":{"date-parts":[[2019,11,22]],"date-time":"2019-11-22T02:49:27Z","timestamp":1574390967000},"page":"5088","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":78,"title":["Measurement of Pulse Wave Signals and Blood Pressure by a Plastic Optical Fiber FBG Sensor"],"prefix":"10.3390","volume":"19","author":[{"given":"Yuki","family":"Haseda","sequence":"first","affiliation":[{"name":"Gratuate School of Medicine, Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julien","family":"Bonefacino","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Photonics Research Centre, The Hong Kong Polytechnic University, 11 Yuk Choi Road, Hung Hom, Kowloon, Hong Kong, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hwa-Yaw","family":"Tam","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Photonics Research Centre, The Hong Kong Polytechnic University, 11 Yuk Choi Road, Hung Hom, Kowloon, Hong Kong, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shun","family":"Chino","sequence":"additional","affiliation":[{"name":"Interdisciplinary Graduate School of Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4297-7648","authenticated-orcid":false,"given":"Shouhei","family":"Koyama","sequence":"additional","affiliation":[{"name":"Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroaki","family":"Ishizawa","sequence":"additional","affiliation":[{"name":"Institute for Fiber Engineering, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2019,11,21]]},"reference":[{"key":"ref_1","unstructured":"Ministry of Health, Labour and Welfare (2019, June 10). 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Sensors, 17.","DOI":"10.3390\/s17010048"},{"key":"ref_12","unstructured":"Sato, S., Kawamura, M., Miyauchi, Y., Koyama, S., and Ishizawa, H. (2011, January 13\u201314). Simultaneous Measurement of the Pulse Rate and Respiratory Rate by Fiber Bragg Gratins Sensors. Proceedings of the 28th SICE Sensing Forum, Yokohama, Japan."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Katsuragawa, Y., and Ishizawa, H. (2015, January 11\u201314). Non-invasive Blood Pressure Measurement by Pulse Wave Analysis Using FBG sensor. Proceedings of the 2015 IEEE International Instrument and Measurement Technology Conference (I2MTC), Pisa, Italy.","DOI":"10.1109\/I2MTC.2015.7151320"},{"key":"ref_14","first-page":"1","article-title":"Ultra-fast polymer optical fiber Bragg grating inscription for medical devices","volume":"7","author":"Bonefacino","year":"2018","journal-title":"Light Sci. 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