IP Library › Granted Patent US 12,201,734
Granted Patent B2
US 12,201,734 · App. 17/054,505 · Granted Jan 21, 2025

Method for sterilizing heart valves

Inventors: Steven M. Claessens (Santa Rosa, CA); Rachel Ann Cooney (Costa Mesa, CA)
Assignee: EDWARDS LIFESCIENCES CORPORATION
A61L2/007A61L2/18A61L27/3687A61L2202/181A61L2202/21
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Quick Facts
Patent No.
US 12,201,734
App. No.
17/054,505
Granted
Jan 21, 2025
Kind
B2
Abstract

A method of preparing a sterilized heart valve, the method comprising: compressing a compressible frame of a heart valve from an expanded configuration to a crimped configuration; the heart valve comprising the frame and a plurality of leaflets coupled to the frame; wherein each of the plurality of leaflets comprises a dry, unfixed, decellularized, antigen-free biological tissue that has been treated with a solution comprising a polyol or polyhydric alcohol; packaging the heart valve within a sealed packaging system while the heart valve is in the crimped configuration; and sterilizing the heart valve packaged within the sealed packaging system with one or more cycles of electron beam radiation.

Claims (27)

1. A method of sterilizing a prosthetic heart valve, the method comprising:

radially compressing a compressible frame of a heart valve from an expanded configuration to an at least partially crimped configuration, the heart valve comprising the frame and a plurality of leaflets coupled to the frame, wherein each of the plurality of leaflets comprises a dry, unfixed, decellularized pericardial tissue, wherein the tissue has not been treated with a cross-linking fixative solution;

packaging the compressed heart valve within a sealed packaging system; and

sterilizing the compressed heart valve packaged within the sealed packaging system with one or more cycles of electron beam radiation.

2. The method of claim 1 , wherein each of the one or more cycles of electron beam radiation comprises a dose of about 15-40 kGy.

3. The method of claim 1 , further comprising treating the plurality of leaflets with a solution comprising a polyol or polyhydric alcohol.

4. The method of claim 3 , wherein the polyol or polyhydric alcohol is glycerol.

5. The method of claim 1 , further comprising coupling the heart valve to a delivery system.

6. A method of preparing a sterilized heart valve, comprising:

coupling a heart valve to a delivery system, the heart valve comprising a compressible frame and a plurality of leaflets coupled to the frame, wherein each of the plurality of leaflets comprises a dry, unfixed, decellularized, antigen-free pericardial tissue, wherein the tissue has not been treated with a cross-linking fixative solution;

compressing the frame of the heart valve from an expanded configuration to a crimped configuration;

packaging the compressed heart valve within a sealed packaging system while the frame of the heart valve is in the crimped configuration; and

sterilizing the compressed heart valve packaged within the sealed packaging system with one or more cycles of electron beam radiation, wherein each of the one or more cycles of electron beam radiation comprises a dose of about 15-40 kGy.

7. The method of claim 6 , wherein the pericardial tissue is selected from the group consisting of porcine pericardial tissue and bovine pericardial tissue.

8. The method of claim 6 , further comprising loading the heart valve within a sheath associated with the delivery system.

9. The method of claim 8 , wherein the loading is performed by causing the sheath to move axially over the heart valve.

10. The method of claim 6 , wherein the frame is at least partially crimped in the crimped configuration.

11. The method of claim 6 , wherein the frame is fully crimped in the crimped configuration.

12. The method of claim 6 , wherein the heart valve has a first diameter when the frame is in the expanded configuration and a second diameter when the frame is in the crimped configuration, wherein the second diameter is smaller than the first diameter.

13. The method of claim 12 , wherein the second diameter is less than about 50% of the first diameter.

14. The method of claim 13 , wherein the second diameter is about 10% of the first diameter.

15. The method of claim 6 , wherein each of the one or more cycles of radiation comprises a dose of about 15-20 kGy.

16. The method of claim 6 , wherein the heart valve packaged within the sealed packaging system is sterilized with two or more cycles of electron beam radiation.

17. The method of claim 6 , wherein the heart valve packaged within the sealed packaging system is sterilized with three cycles of electron beam radiation.

18. The method of claim 6 , further comprising refrigerating the heart valve and the packaging system before the sterilizing step.

19. The method of claim 6 , wherein the heart valve does not comprise fluorinated materials.

20. The method of claim 6 , wherein the packaging system does not contain a liquid storage solution.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 30, 2021
From: CLAESSENS, STEVEN M.; GOHRES, RACHEL ANN
To: EDWARDS LIFESCIENCES CORPORATION
Reel/Frame 055769/0879 →
Continuity (2)
Provisional Application 62572277 · Oct 13, 2017
Related Publication 20210187135A1 · Jun 24, 2021
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