Title :
Detection of finger-tip blood vessel pulsation using CoSiB thin amorphous wire CMOS-IC SI sensor
Author :
Kusumoto, D. ; Shen, L.P. ; Naruse, Y. ; Mohri, K. ; Uchiyama, T.
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
Finger-tip blood vessel pulsation (FTP) with a capillary blood vessel pressure of few milligrams was accurately detected using a CoSiB amorphous wire stress-impedance (SI) sensor which shows a giant strain-gauge factor of about 4000. The incisura in a FTP waveform was clearly observed for young aged subjects, while the incisura slightly appeared in the FTP waveform for older subjects after sports. The blood vessel pulsation speed was measured between the elbow and the wrist V ew, and also between the wrist and the finger-tip Vwf , and the authors found that Vew was faster than Vwf. It is concluded that the FTP sensing will be useful for diagnosis of the circulatory system and the health state
Keywords :
CMOS integrated circuits; amorphous magnetic materials; biomedical electronics; blood pressure measurement; blood vessels; multivibrators; CoSiB; CoSiB thin amorphous wire CMOS-IC SI sensor; blood vessel pulsation speed; capillary blood vessel pressure; circulatory system diagnosis; elbow; finger-tip blood vessel pulsation detection; giant strain-gauge factor; health state diagnosis; incisura; sports; wrist; young aged subjects; Amorphous materials; Blood vessels; CMOS integrated circuits; Elbow; Infrared sensors; Pulse generation; Sensor phenomena and characterization; Velocity measurement; Wire; Wrist;
Journal_Title :
Magnetics, IEEE Transactions on
