Leaflet Alignment Fixture and Methods Therefor

• US 20110000073A1
• Filed: 03/31/2010
• Published: 01/06/2011
• Est. Priority Date: 03/31/2009
• Status: Abandoned Application

• Current Assignee: Medical Entrepreneurs II, Inc.
• Original Assignee: Medical Entrepreneurs II, Inc.
• Inventors: O'Fallon, Patrick, Huynh, Van, Yang, Jun
• Application Number:
  US12/752,084
• Publication Number:
  US 20110000073A1
• Time in Patent Office: Days
• US Class Current: 29/464
• CPC Class Codes: A61F 2/2412 with soft flexible valve members, e.g. tissue valves shaped like natural valves check valves with flexible valve members in general F16K15/14
• CPC Class Codes: A61F 2/2415 Manufacturing methods
• CPC Class Codes: Y10T 29/49895 Associating parts by use of aligning means [e.g., use of a drift pin or a "fixture"]
• CPC Class Codes: Y10T 29/49998 Work holding
• CPC Class Codes: Y10T 29/53961 with work-holder for assembly
• CPC Class Codes: Y10T 29/53978 including means to relatively position plural work parts

Abstract

Described herein is an assembly and alignment tool for aligning leaflets of a soft leaflet prosthetic heart valve and fix the leaflets to each other and/or to a wireform or stent. In embodiments, the assembly or alignment tool includes a mandrel configured to support one or more leaflets of a prosthetic valve. The mandrel includes at least one suture hole disposed on the surface thereof to allow a needle to pass through when sewing the one or more leaflets to a wireform.

Claims

1. An assembly tool for a prosthetic valve, comprising:

a mandrel configured to support one or more leaflets of a prosthetic valve, wherein the mandrel includes at least one suture hole disposed on the surface thereof, and wherein the at least one suture hole is configured to allow a needle to pass through when sewing the one or more leaflets to a wireform.

2. The assembly tool of claim 1, wherein the mandrel is configured in the shape of the inflow side of the one or more leaflets.

3. The assembly tool of claim 1, further comprising a stabilization component configured to stabilize the one or more leaflets on the mandrel.

4. The assembly tool of claim 3, further comprising a guide configured to align the stabilization component and the mandrel in a predetermined alignment with the one or more leaflets.

5. The assembly tool of claim 4, wherein the guide comprises opposing similar surface contours to at least one of the mandrel and the stabilization component.

6. The assembly tool of claim 4, wherein the guide includes a protruding structure.

7. The assembly tool of claim 6, wherein the protruding structure is in the form of a triangle, circle, oval, square, or a combination thereof.

8. The assembly tool of claim 3, wherein the stabilization component comprises a cap configured to rest on top of the one or more leaflets.

9. The assembly tool of claim 8, wherein the cap is in the shape of the outflow side of the one or more leaflets.

10. The assembly tool of claim 3, wherein the stabilization component comprises at least one of a partial wireform shape or a complete wireform shape.

11. The assembly tool of claim 3, wherein the stabilization component comprises one or more needles.

12. The assembly tool of claim 3, wherein the stabilization component comprises a structure with at least one needle configured for placement in the at least one suture hole of the mandrel.

13. The assembly tool of claim 3, wherein the stabilization component comprises a component for providing a friction or vacuum between the one or more leaflets and the mandrel.

14. The assembly tool of claim 3, wherein the stabilization component comprises a clamp.

15. The assembly tool of claim 1, wherein the suture holes are between about 0.01″

and 0.25″

in diameter.

16. The assembly tool of claim 1, wherein the mandrel includes one or more slits to locate and align the wireform, wherein the wireform is configured to be placed on top of the one or more leaflets.

17. The assembly tool of claim 1, wherein the mandrel includes a lip configured to keep the one or more leaflets in a predetermined alignment.

18. The assembly tool of claim 17, wherein the lip is configured to keep the one or more leaflets aligned in such a manner as to keep a constant coaptation gap.

19. The assembly tool of claim 1, further comprising a tab shelf configured to allow the one or more leaflets to join together without interference.

20. The assembly tool of claim 1, wherein one or more components of the tool are comprised of a rigid, non-brittle, biocompatible, and non-leaching material.

21. The assembly tool of claim 20, wherein the material is plastic.

22. The assembly tool of claim 20, wherein the material is stainless steel.

23. The assembly tool of claim 1, wherein the one or more leaflets of the prosthetic valve are comprised of a biological tissue.

24. The assembly tool of claim 23, wherein the biological tissue is human pericardial tissue, animal pericardial tissue, dura mater, or a combination thereof.

25. The assembly tool of claim 1, wherein the one or more leaflets of the prosthetic valve are comprised of a synthetic material.

26. A method for assembling a prosthetic valve, the method comprising:

providing one or more leaflets;

providing a mandrel configured to support the one or more leaflets;

providing a stabilization component configured to stabilize the one or more leaflets on the mandrel;

providing a guide configured to align the stabilization component and the mandrel in a desired alignment with the one or more leaflets; and

sewing the one or more leaflets to a wireform;

wherein the mandrel, stabilization component, and guide are configured to align the leaflets and the wireform in a desired configuration.

27. The method of claim 26, wherein the desired configuration includes the leaflets being aligned in such a manner as to include a coaptation gap.

28. The method of claim 27, wherein the coaptation gap is between 0.000 inches and 0.200 inches.

29. The method of claim 26, wherein the desired configuration includes the leaflets being aligned in such a manner as to include no coaptation gap.

30. An assembly tool comprising:

an outer portion having a plurality of cusps and plateaued extensions; and

a mandrel at least partially contained within the outer portion, wherein the mandrel has a surface configured to replicate an inflow surface of at least one leaflet of a prosthetic valve, and wherein the mandrel is configured to support the at least one leaflet in a predetermined alignment when the at least one leaflet is placed thereon.

31. The assembly tool of claim 30, further comprising a plurality of suture holes disposed in a surface of the mandrel.

32. The assembly tool of claim 30, further comprising a stabilization component, wherein the stabilization component is configured to hold the at least one leaflet in the predetermined alignment when the at least one leaflet is placed on the mandrel.

33. The assembly tool of claim 30, wherein the mandrel has a plurality of wireform slits disposed on a surface, wherein the wireform slits are configured to locate and align a wireform when the wireform is placed thereon.

34. The assembly tool of claim 30, wherein the surface of the mandrel is configured to replicate an inflow surface of at least one leaflet of the prosthetic valve in an open position.

35. The assembly tool of claim 34, further comprising a stabilization component, wherein the stabilization component is configured to stabilize the at least one leaflet of the prosthetic valve in the open position.

36. The assembly tool of claim 30, further comprising a lip positioned between the mandrel and the outer portion, wherein the lip is configured to keep the leaflets aligned in such a manner as to keep a constant coaptation gap.