Measurement of Pulse Wave Signals and Blood Pressure by a Plastic Optical Fiber FBG Sensor

被引:60
|
作者
Haseda, Yuki [1 ]
Bonefacino, Julien [2 ]
Tam, Hwa-Yaw [2 ]
Chino, Shun [3 ]
Koyama, Shouhei [4 ]
Ishizawa, Hiroaki [5 ]
机构
[1] Shinshu Univ, Gratuate Sch Med Sci & Technol, 3-15-1 Tokida, Ueda, Nagano 3868567, Japan
[2] Hong Kong Polytech Univ, Photon Res Ctr, Dept Elect Engn, Hung Hom,Kowloon, 11 Yuk Choi Rd, Hong Kong, Peoples R China
[3] Shinshu Univ, Interdisciplinary Grad Sch Sci & Technol, 3-15-1 Tokida, Ueda, Nagano 3868567, Japan
[4] Shinshu Univ, Fac Text Sci & Technol, 3-15-1 Tokida, Ueda, Nagano 3868567, Japan
[5] Shinshu Univ, Inst Fiber Engn, 3-15-1 Tokida, Ueda, Nagano 3868567, Japan
关键词
fiber Bragg grating; plastic optical fiber; non-invasive measurement; pulse wave signals; blood pressure; partial least squares regression;
D O I
10.3390/s19235088
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
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.
引用
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页数:11
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