Claims for Patent: 8,647,605

Summary for Patent: 8,647,605

Title:	Real time imaging during solid organ transplant
Abstract:	The invention provides methods and systems for imaging vessels in a subject. In certain embodiments the vessels may be associated with a solid organ transplant.
Inventor(s):	Mangat; Gurpreet (Markham, CA), Brzozowski; Lukasz (Toronto, CA), Croft; Richard L (Oakville, CA)
Assignee:	Novadaq Technologies, Inc. (Mississauga, CA)
Application Number:	11/912,877
Patent Claims:	1. A method of intra-operatively determining the patency of a transplanted organ or a vessel which is surgically joined to the transplanted organ in a recipient subject, comprising: administering a fluorescent dye to a recipient subject prior to an organ transplant procedure, wherein the fluorescent dye is a tricarbocyanine dye; obtaining a fluorescent image of an organ or a vessel attached to the organ in the recipient subject prior to the organ transplant procedure; administering a fluorescent dye to the recipient subject after the organ transplant procedure, wherein the fluorescent dye is a tricarbocyanine dye; applying a sufficient amount of energy to a transplanted organ or the vessel surgically joined to the transplanted organ such that the fluorescent dye fluoresces; obtaining a fluorescent image of the transplanted organ or a vessel surgically joined to the transplanted organ; calculating on a processor a pixel intensity of the fluorescent image of the organ or the vessel prior to the transplant procedure and a pixel intensity of the fluorescent image of the transplanted organ or the vessel surgically joined to the transplanted organ; calculating on the processor a change in pixel intensity between the fluorescent image of the organ or the vessel prior to the transplant procedure and the fluorescent image of the transplanted organ or the vessel surgically joined to the transplanted organ; and comparing the fluorescent image of the transplanted organ or the vessel surgically joined to the transplanted organ with the fluorescent image of the organ or the vessel prior to the transplant procedure, wherein an increase in pixel intensity from prior to the transplant procedure to after the transplant procedure indicates greater perfusion in at least one of a tissue or fluid flow through the vessel surgically joined to the transplanted organ, and a decrease in pixel intensity from prior to the transplant procedure to after the transplant procedure indicates a decrease in perfusion in at least one of the tissue or fluid flow through the vessel surgically joined to the transplanted organ. 2. The method of claim 1, wherein the recipient subject is an animal. 3. The method of claim 2, wherein the animal is a human. 4. The method of claim 1, wherein the fluorescent dye comprises a mixture or combination of multiple fluorescent dyes. 5. The method of claim 1, wherein the tricarbocyanine dye is indocyanine green. 6. The method of claim 1, wherein the dye is administered intravenously. 7. The method of claim 1, wherein the dye is administered by catheter. 8. The method of claim 1, wherein the dye is administered as a bolus injection. 9. The method of claim 1, wherein the dye is administered less than an hour before determining patency. 10. The method of claim 1, wherein the dye is administered more than 30 seconds before determining patency. 11. The method of claim 1, wherein the energy is light energy. 12. The method of claim 11, wherein the light energy is provided by a laser. 13. The method of claim 11, wherein the light energy is provided by an incandescent light and a filter. 14. The method of claim 11, wherein the wavelength of the light energy is in the infra-red spectrum. 15. The method of claim 11, wherein the wavelength of the light energy is about 805 nanometers. 16. The method of claim 1, wherein the image is obtained by a camera. 17. The method of claim 16, wherein the camera is a charge coupled device. 18. The method of claim 16, wherein the camera is a video recorder. 19. The method of claim 11, wherein the laser power output is about 2.5 watts. 20. The method of claim 19, wherein the laser power output lasts for about 30 seconds. 21. The method of claim 20, wherein the output is a continuous wave. 22. The method of claim 1, wherein the vessel is a blood vessel. 23. The method of claim 1, wherein the vessel is an artery. 24. The method of claim 1, wherein the vessel is a vein. 25. The method of claim 1, wherein the vessel is a ureter. 26. The method of claim 1, wherein the vessel is comprised of a duct. 27. The method of claim 1, wherein the organ is chosen from a heart, a liver, a pancreas, a kidney and a lung. 28. The method of claim 1, wherein the organ is one or more of a heart and a lung. 29. The method of claim 1, wherein the organ is one or more of a pancreas and a kidney. 30. The method of claim 1, wherein the vessel is chosen from an inferior vena cava, superior vena cava, an atrial cuff, an aortic root, an aorta, a pulmonary trunk, a pulmonary vein, a pulmonary artery, a hepatic artery, a hepatic vein, a portal vein, a bile duct, a renal artery, a renal vein, a pancreatic duct, a pancreatic artery, a pancreatic vein, an arterial graft, a venous graft. 31. The method of claim 1, wherein the vessel comprises an anastomosis. 32. The method of claim 1, wherein the method is performed ex vivo. 33. The method of claim 1, wherein the vessel is from a biological source. 34. The method of claim 1, wherein the vessel comprises a graft. 35. The method of claim 34, wherein the graft is chosen from an allograft, an autograft and a xenograft. 36. The method of claim 1, wherein the vessel is from a synthetic source. 37. The method of claim 1, wherein the image is obtained with a surgical microscope or endoscope. 38. A method of intra-operatively determining the patency of a transplanted organ or a vessel which is attached to the transplanted organ in a recipient subject, comprising: administering a fluorescent dye to a donor subject prior to an organ transplant procedure, wherein the fluorescent dye is a tricarbocyanine dye; obtaining a fluorescent image of an organ or a vessel attached to the organ in the donor subject prior to the organ transplant procedure; administering a fluorescent dye to a recipient subject after the organ transplant procedure, wherein the fluorescent dye is a tricarbocyanine dye; applying a sufficient amount of energy to the transplanted organ or the vessel such that the fluorescent dye fluoresces; obtaining a fluorescent image of the transplanted organ or the vessel; calculating on a processor a pixel intensity of the fluorescent image of the organ or the vessel prior to the transplant procedure and a pixel intensity of the fluorescent image of the transplanted organ or the vessel; calculating on the processor a change in pixel intensity between the fluorescent image of the organ or the vessel prior to the transplant procedure and the fluorescent image of the transplanted organ or the vessel; and comparing the fluorescent image of the transplanted organ or the vessel with the fluorescent image of the organ or the vessel prior to the transplant procedure, wherein an increase in pixel intensity from prior to the transplant procedure to after the transplant procedure indicates greater perfusion in at least one of a tissue or fluid flow through the vessel, and a decrease in pixel intensity from prior to the transplant procedure to after the transplant procedure indicates a decrease in perfusion in at least one of the tissue or fluid flow through the vessel. 39. A method of intra-operatively determining the patency of a transplanted organ or a vessel which is surgically joined to the transplanted organ in a recipient subject, comprising: administering a fluorescent dye to a recipient subject prior to an organ transplant procedure, wherein the fluorescent dye is a tricarbocyanine dye; obtaining a fluorescent image of an organ or a vessel attached to the organ in the recipient subject prior to the organ transplant procedure; administering a fluorescent dye to a recipient subject after the organ transplant procedure, wherein the fluorescent dye is a tricarbocyanine dye; applying a sufficient amount of energy to a transplanted organ or a transplanted vessel such that the fluorescent dye fluoresces; obtaining a fluorescent image of the transplanted organ or the transplanted vessel; calculating on a processor a pixel intensity of the fluorescent image of the organ or the vessel prior to the transplant procedure and a pixel intensity of the fluorescent image of the transplanted organ or the transplanted vessel; calculating on the processor a change in pixel intensity between the fluorescent image of the organ or the vessel prior to the transplant procedure and the fluorescent image of the transplanted organ or the transplanted vessel; and comparing the fluorescent image of the transplanted organ or the transplanted vessel with the fluorescent image of the organ or the vessel prior to the transplant procedure, wherein an increase in pixel intensity from prior to the transplant procedure to after the transplant procedure indicates greater perfusion in at least one of a tissue or fluid flow through the transplanted vessel, and a decrease in pixel intensity from prior to the transplant procedure to after the transplant procedure indicates a decrease in perfusion in at least one of the tissue or fluid flow through the transplanted vessel.