Abstract
Fingertip 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 an FTP waveform was clearly observed for young subjects, whereas the incisura was only slightly evident in the FTP waveforms for older subjects. The FTP speed, and the change of FTP waveform before and after smoking, was measured in which the magnitude of FTP waveforms for some subjects rapidly decreased during smoking and gradually recovered to the original waveform after smoking. FTP sensing will be useful for diagnosis of the circulatory system and of the general state of health.
