Patent ID: 8406860
Filing Date: 2013-03-26
Classification: A61B,A61M,G06T

Abstract:
1. A method for intraoperatively assessing blood flow in surgical flaps and identifying vascular compromise, comprising the steps of: defining a static region of interest (ROI) in an image of a surgical flap; detecting a fluorescence response from tissue following application of a bolus of ICG into the bloodstream; measuring, on one of native tissue adjacent the ROI and a surgical flap pre-operatively associated with the ROI, a first rate of change of increasing perfusion of ICG with time until a determined maximum fluorescence is reached; measuring, on the surgical flap post-operatively associated with the ROI, a second rate of change of increasing perfusion of ICG with time until a determined maximum fluorescence is reached; measuring, on one of native tissue adjacent the ROI and the surgical flap pre-operatively associated with the ROI, a first rate of change of decreasing perfusion of ICG with time after the determined maximum fluorescence is reached; measuring, on the surgical flap post-operatively associated with the ROI, a second rate of change of decreasing perfusion of ICG with time after the determined maximum fluorescence is reached; and determining a degree of vascular compromise at the ROI from at least one of