Patent · US Active

Computer-implemented method, computer program and surgical system for determining the volumetric flow rate of blood through a portion of a blood vessel in a surgical field

US11771322B2 · kind B2 · utility

0Cited by

0References

16Claims

0Family size

Assignee

Carl Zeiss Meditec AG · DE

Inventors

Ady Naber · Karlsruhe, DE
Werner Nahm · Vellberg, DE
Christoph Hauger · Aalen, DE
Roland Guckler · Ulm, DE

Key dates

Filing date	Feb 2, 2021
Grant date	Oct 3, 2023
Priority date	—
Expiry date	Feb 2, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG06V2201/031
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The invention relates to a computer-implemented method (10) for determining the blood volume flow (IBI) through a portion (90i, i=1, 2, 3, . . . ) of a blood vessel (88) in an operating region (36) using a fluorophore. A plurality of images (801, 802, 803, 804, . . . ) are provided, which are based on fluorescent light in the form of light having wavelengths lying within a fluorescence spectrum of the fluorophore, and which show the portion (90i) of the blood vessel (88) at different recording times (t1, t2, t3, t4, . . . ). By processing at least one of the provided images (801, 802, 803, 804, . . . ), a diameter (D) and a length (L) of the portion (90i) of the blood vessel (88) and also a time interval for a propagation of the fluorophore through the portion (90i) of the blood vessel (88) are determined, which time interval describes a characteristic transit time (τ) for the fluorophore in the portion (90i) of the blood vessel (88), in which a blood vessel model (MBQ) for the portion (90i) of the blood vessel (88) is specified, which blood vessel model describes the portion (90i) of the blood vessel (88) as a flow channel (94) having a length (L), having a wall (95) with a wall t…

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.