Tiny wearable sensor measures blood flow

Kyocera has developed a tiny optical sensor to measure blood flow volume in subcutaneous tissue, meant to be integrated into a phone or wearable. Potential applications include monitoring stress and preventing dehydration, heat stroke, and altitude sickness.

The device will be used  in/on an ear, finger or forehead, to measure the velocity-driven frequency of reflected light within blood vessels. The  sensor utilizes the relative shift in frequency and the strength of the reflected light  to determine blood-flow volume.

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