Kayvan Najarian,Kenn Oldham,Daniel Slavin,Ashwin Belle,Kevin R. Ward,Sardar Ansari,Rodney C. Daniels
申请号：
US14675062
公开号：
US20150305632A1
申请日:
2015.03.31
申请国别(地区):
US
年份:
2015
代理人:
摘要：
The invention is a passive, wearable sensor that uses a thin piezoelectric material to produce a time history of blood pressure of the patient, with signal processing algorithms to extract physiological information. The sensor consists of a piezoelectric transducer set in a polymer laminate that can be applied to the finger or wrist of the patient. During use, a combination of compressive and bending deformation in the piezoelectric layer in response to blood pressure in the finger or wrist as a voltage output. Using signal processing techniques, the raw signal is filtered and decomposed to obtain a information to form derivative signals such as blood pressure, pulse pressure, pulse pressure variability, heart rate, heart rate variability, and respiratory rate which can be very important pre-cursors in the monitoring of the patient's physiological conditions.
