Bileaflet prosthetic valve and method of manufacture

• US 20050149181A1
• Filed: 01/07/2004
• Published: 07/07/2005
• Est. Priority Date: 01/07/2004
• Status: Abandoned Application

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Eberhardt, Carol E.
• Application Number:
  US10/752,864
• Publication Number:
  US 20050149181A1
• Time in Patent Office: Days
• US Class Current: 623/2.140
• 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: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable

Abstract

A prosthetic valve including a body, a first leaflet, and a second leaflet. The first leaflet extends across and is coupled to the body. The first leaflet is cut from a first porcine aortic valve and defines a first inner surface. The second leaflet extends across and is coupled to the body opposite the first leaflet. The second leaflet is cut from a second porcine aortic valve and defines a second inner surface.

Claims

1. A prosthetic valve comprising:

a body;

a first leaflet extending across and coupled to the body, the first leaflet being cut from a porcine aortic valve and defining a first inner surface; and

a second leaflet extending across and coupled to the body opposite the first leaflet, the second leaflet being cut from a porcine aortic valve and defining a second inner surface;

wherein the prosthetic valve is configured such that upon closure of the first and second leaflets, the first inner surface and the second inner surface redundantly coapt.

3. The prosthetic valve of claim 1, wherein the first leaflet and the second leaflet are each a left cusp.

4. The prosthetic valve of claim 1, wherein the first and second leaflets each define a free edge, and upon closure of the prosthetic valve, the free edges interact and pucker.

5. The prosthetic valve of claim 1, wherein the first and second leaflets are coupled with the body in a manner characterized by a lack of tautness.

6. The prosthetic valve of claim 1, wherein the first and second leaflets each define a cut edge fixed to the body, a free edge not fixed to the body, and the first and second inner surfaces coapt with each other along a catenary spaced from the free edges, and further wherein the catenary represents a line of interaction between the first and second leaflets nearest the cut edge.

7. The prosthetic valve of claim 6, wherein upon closure of the prosthetic valve, the first inner surface and the second inner surface interact to define an enhanced surface area interface between the catenary and the free edges.

8. The prosthetic valve of claim 6, wherein each of the free edges has a length that is longer than a length of the catenary.

9. The prosthetic valve of claim 6, wherein upon opening of the first and second leaflets, the first and second free edges define an opening, the opening having a perimeter greater than twice a length of the catenary.

10. The prosthetic valve of claim 1, wherein the prosthetic valve is characterized by the absence of a third leaflet.

11. The prosthetic valve of claim 1, wherein the body includes a stent including an annular frame, a first strut extending from the annular frame, and a second strut spaced from the first strut and extending from the annular frame.

12. The prosthetic valve of claim 10, wherein the first strut and the second strut are nonsymmetrically positioned with respect to the annular frame.

13. The prosthetic valve of claim 1, wherein the prosthetic valve is a prosthetic mitral valve.

14. The prosthetic valve of claim 1, wherein the body includes a tubular body.

15. The prosthetic valve of claim 14, wherein the tubular body is an aortic root.

2. (canceled)

16. A prosthetic valve comprising:

a body;

a first leaflet extending across and sutured to the body, the first leaflet having an elongated shape and defining a cut edge sutured to the body, a free edge not sutured to the body, and an inner surface; and

a second leaflet extending across and is sutured to the body opposite the first leaflet, the second leaflet having an elongated shape and defining a cut edge sutured to the body, a free edge not sutured to the body, and an inner surface;

wherein the inner surfaces of the first and second leaflets are adapted to coapt with each other along a catenary, the catenary being spaced from the free edges of the first and second leaflets and representing a line of interaction between the first and second leaflets nearest the cut edge.

17. The prosthetic valve of claim 16, wherein the first leaflet is cut from a first porcine aortic valve, and the second leaflet is cut from a second porcine aortic valve.

18. The prosthetic valve of claim 17, wherein the first and second leaflets are each a left cusp.

19. The prosthetic valve of claim 16, wherein upon closure of the prosthetic valve, the inner surface of the first leaflet redundantly coapts with the inner surface of the second leaflet.

21. The prosthetic valve of claim 16, wherein each of the free edges has a length that is longer than a length of the catenary.

22. The prosthetic valve of claim 16, wherein upon opening the prosthetic valve, the free edges define an opening having a perimeter greater than the twice a length of the catenary.

24. The prosthetic valve of claim 16, wherein the first and second leaflets each define a free edge not sutured to the body, and upon closure of the prosthetic valve, the free edges pucker.

25. The prosthetic valve of claim 16, wherein the first and second leaflets are coupled to the body in a manner characterized by a lack of tautness.

26. The prosthetic valve of claim 16, wherein the body includes a stent including an annular frame, a first strut extending from the annular frame, and a second strut spaced from the first strut and extending from the annular frame.

27. The prosthetic valve of claim 26, wherein the first strut and the second strut are nonsymmetrically positioned with respect to the annular frame.

28. The prosthetic valve of claim 16, wherein the prosthetic valve is a prosthetic mitral valve.

29. The prosthetic valve of claim 16, wherein the body includes a tubular body

30. The prosthetic valve of claim 29, wherein the tubular body is an aortic root.

20. (canceled)

23. The prosthetic valve of claim 2016, wherein upon closure of the prosthetic valve, the first and second inner surfaces interact to define an enhanced surface area interface between the catenary and the free edges.

31. A prosthetic valve comprising:

a body;

a first leaflet extending across and sutured to the body, the first leaflet being cut from a first porcine aortic valve, defining a first inner surface, and having an elongated shape; and

a second leaflet extending across and sutured to the body opposite the first leaflet, the second leaflet being cut from a second porcine aortic valve, defining a second inner surface, and having an elongated shape.

32. A method of manufacturing a prosthetic valve, the method comprising:

providing a body;

cutting a first leaflet defining a first inner surface from a first porcine aortic valve;

coupling the first leaflet to the body;

cutting a second leaflet defining a second inner surface from a second porcine aortic valve; and

coupling the second leaflet to the body opposite the first leaflet.

33. The method of claim 32, wherein the first leaflet and the second leaflet are each a left cusp.

34. The method of claim 32, wherein coupling the first leaflet and the second leaflet to the first and second struts includes positioning the first leaflet and the second leaflet upon the body such that the first and second inner surfaces redundantly coapt upon closure of the prosthetic valve.

35. The method of claim 32, wherein coupling the first leaflet and coupling the second leaflet to the first and second struts includes leaving a first free edge of the first leaflet and a second free edge of the second leaflet unsutured to the body, respectively, wherein the free edges are adapted to pucker upon closure of the prosthetic valve.

36. The method of claim 32, wherein cutting the first and second leaflets includes selecting the first and second leaflets from a plurality of porcine aortic valves previously harvested for potential use in a prosthetic aortic valve.

37. The method of claim 32, wherein cutting the first and second leaflets includes selecting the first and second leaflets from a plurality of leaflets, and each of the plurality of leaflets differs in size from each of the other plurality of leaflets.

38. The method of claim 37, wherein selecting the first and second leaflets includes selecting the first and second leaflets each having a size corresponding to a size of the body.

39. The method of claim 32, wherein the body includes a stent including an annular frame, a first stent extending from the annular frame, and a second strut extending from the annular frame spaced from the first stent.

40. The method of claim 32, wherein the body is a tubular body.