Pulse wave measurement in human using piezoresistive cantilever on liquid

Pulse wave measurement in human using piezoresistive cantilever on liquid We propose a device that can measure pulse waves at various points on human body with high sensitivity. Pulse wave velocity was calculated from a synchronized pulse wave measurement on two points. The device had a piezoresistive cantilever placed on silicone oil. The cantilever with oil wasembedded in polydimethylsiloxane (PDMS). Pressure waves from arteries can be well conveyed to the cantilever, for the human-skin-like acoustic impedance of the silicone oil and PDMS. The signal to noise ratio of the device was ~80 dB in 10-100 Hz, when excited ~1 μm in displacement.