Method and system for calculating blood vessel pressure difference and fractional flow reserve
US11064897B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2016 |
| Grant date | Jul 20, 2021 |
| Priority date | — |
| Expiry date | Nov 1, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2576/023
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for computing fractional flow reserve (FFR), including receiving geometrical parameters of a blood vessel segment including a proximal end and a distal end, the geometrical parameters including a first geometrical parameter, a second geometrical parameter and a third geometrical parameter; and with the proximal end as a reference point, deriving a reference lumen diameter function and a geometrical parameter difference function based on the geometrical parameters and the distance from the position along the segment of blood vessel to the reference point. Derivatives of the geometrical parameter difference function are calculated in multiple scales. FFR is computed as a ratio of a second blood flow pressure at the first location of the blood vessel to a first blood flow pressure at the proximal end of the segment based on the multiple scales of derivative difference functions and the maximum mean blood flow velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.