Dynamic calibration of a blood pressure measurement device
US11337657B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2016 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Mar 2, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/0247
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Various embodiments enable calibrating a non-invasive blood pressure measurement device by determining multiple parameters defining a stress-strain relationship of an artery of a patient. The device may obtain output signals from a blood pressure sensor at two or more measurement elevations. The obtained measurement signals may be filtered into AC and quasi-DC components, and results fit to exponential functions to calculate an arterial time constant and a veinous time constant related to vein draining/filling rates. The arterial and veinous time constants may be used to calculate an infinity ratio. The infinity ratio and the obtained sensor output may be used to calculate values for multiple parameters defining a stress-strain relationship of a measured artery. Once defined, this stress-strain relationship may be stored and applied to future sensor output signals (e.g., blood pressure measuring sessions) to infer patient blood pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.