Miniature piezoelectric cardiovascular monitoring system
US10610113B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2015 |
| Grant date | Apr 7, 2020 |
| Priority date | — |
| Expiry date | Nov 2, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.