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 was embedded 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.

[1]  I. Shimoyama,et al.  A sensitive liquid-cantilever diaphragm for pressure sensor , 2013, 2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS).

[2]  Darrin J. Young,et al.  Skin-Coupled Personal Wearable Ambulatory Pulse Wave Velocity Monitoring System Using Microelectromechanical Sensors , 2014, IEEE Sensors Journal.

[3]  Haim Azhari,et al.  Appendix A: Typical Acoustic Properties of Tissues , 2010 .

[4]  Panayiotis A. Kyriacou,et al.  Pilot investigation of photoplethysmographic signals and blood oxygen saturation values during blood pressure cuff-induced hypoperfusion , 2009 .

[5]  C. Hayward,et al.  Noninvasive determination of age-related changes in the human arterial pulse. , 1989, Circulation.

[6]  B. Pannier,et al.  Assessment of arterial distensibility by automatic pulse wave velocity measurement. Validation and clinical application studies. , 1995, Hypertension.

[7]  Wen-Jong Wu,et al.  Flexible PZT Thin Film Tactile Sensor for Biomedical Monitoring , 2013, Sensors.

[8]  H. Hasegawa,et al.  Correction of change in propagation time delay of pulse wave during flow-mediated dilation in ultrasonic measurement of arterial wall viscoelasticity , 2014 .

[9]  Jürg Dual,et al.  Impedance matched channel walls in acoustofluidic systems. , 2014, Lab on a chip.

[10]  I. Shimoyama,et al.  Multi-axis force sensor with dynamic range up to ultrasonic , 2014, 2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS).