Intravascular sensing method and system
US9775567B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2015 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Dec 22, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/0002
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Described herein are methods and systems for calculating a corrected Fractional Flow Reserve (FFR). An illustrative method includes delivering a first pressure sensing device including a pressure sensor to a location in a blood vessel having a stenosis, positioning the pressure sensor distal to the stenosis, measuring the distal pressure, measuring the proximal pressure, and calculating a corrected FFR using the measured proximal and distal pressures and applying a correction factor or correction equation. The corrected FFR may approximate a FFR that would have been obtained if the pressure measured downstream of the stenosis was measured using a second pressure sensing device having a second maximum cross-sectional area in a distal portion of the second pressure sensing device that is different from the first maximum cross-sectional area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.