| 摘要 |
An optical type pulse wave detection section 1 detects the pulse waveform MH above the skin while moving in the circumferential direction of the arm, when a manual position change mechanism 2 is operated. Capillary vessels and arterioles surrounding a radial artery 24 are formed inside the skin, and pulsation of the capillary vessels and arterioles are opposite in polarity. When a polarity detection section 3 outputs a polarity detection signal KS showing the polarity of the pulse waveform MH, the polarity is displayed on a display 4. Accordingly, a subject can position the pulse wave detection section 1 above the arterioles surrounding the artery by operating the manual position change mechanism 2 while observing the display 4, allowing the pulse waveform MH to be detected with an optimal SN ratio. In addition, the pulse waveform of the arterioles can be detected by specifying the position of the artery without causing a constrictive feeling to the subject.
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