Micro integrated laser Doppler blood flow sensor and its application to dehydration prevention

Using Micro Electro Mechanical Systems (MEMS) technologies, we have developed the world´s smallest, lightest, and least power-consuming integrated laser Doppler blood flow sensor. Unlikely commercial optical fiber type blood flow instruments, the structure of our sensor need not optical fiber, which is also invulnerable to any movements of the person wearing it. Therefore our sensor enables stable measurement the person raising an arm with our sensor attached to a finger-tip (arm-raising test). In this paper, we present a new structure of an integrated laser Doppler blood flow sensor and its application to dehydration prevention using our sensor and arm-raising test.