Two piece heart valve and anchor

• US 20050137691A1
• Filed: 12/23/2003
• Published: 06/23/2005
• Est. Priority Date: 12/23/2003
• Status: Abandoned Application

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Sadra Medical, Inc. (Boston Scientific Corporation)
• Inventors: Krolik, Jeff, Morejohn, Dwight P., Michlitsch, Kenneth J., Salahieh, Amr
• Application Number:
  US10/746,942
• Publication Number:
  US 20050137691A1
• Time in Patent Office: Days
• US Class Current: 623/2.110
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/006 modular

Abstract

Apparatus for endovascularly replacing a patient'"'"'s heart valve, including: a custom-designed anchor; and a replacement valve, wherein the custom-designed anchor is adapted to engage native leaflets of the heart valve, and wherein the anchor and the valve are adapted for in vivo expansion and coupling to one another to form composite apparatus that endovascularly replaces the heart valve. The invention also includes a method for endovascularly replacing a patient'"'"'s heart valve. In some embodiments the method includes the steps of: providing apparatus comprising an anchor piece and a replacement valve piece; endovascularly delivering the anchor piece to a vicinity of the heart valve in a collapsed delivery configuration; expanding the anchor piece to a deployed configuration; engaging at least one valve leaflet of the heart valve with the anchor piece; endovascularly delivering the replacement valve piece to the vicinity of the heart valve in a collapsed delivery configuration; expanding the replacement valve piece to a deployed configuration; and coupling the valve piece to the anchor piece in vivo to form composite two-piece apparatus that endovascularly replaces the patient'"'"'s heart valve.

Claims

1. Apparatus for endovascularly replacing a patient'"'"'s heart valve, the apparatus comprising:

a custom-designed anchor; and

a replacement valve,

wherein the custom-designed anchor is adapted to engage native leaflets of the heart valve, and

wherein the anchor and the valve are adapted for in vivo expansion and coupling to one another to form composite apparatus that endovascularly replaces the heart valve.

2. The apparatus of claim 1, wherein the anchor comprises a lip section adapted to engage valve leaflets of the heart valve and to preclude distal migration of the composite apparatus.

3. The apparatus of claim 2, wherein the anchor comprises a groove section adapted to couple the anchor to the replacement valve to form the composite apparatus.

4. The apparatus of claim 3, wherein the groove section is adapted to reduce impingement of tissue from the valve leaflets within the groove section, thereby facilitating formation of the composite apparatus.

5. The apparatus of claim 1, wherein the anchor comprises a skirt section adapted to preclude proximal migration of the composite apparatus.

6. The apparatus of claim 1, wherein the anchor is at least partially covered by a biocompatible film.

7. The apparatus of claim 1, wherein the anchor comprises a lip section, a groove section and a skirt section.

8. The apparatus of claim 7, wherein the replacement valve comprises a valve and an expandable frame.

9. The apparatus of claim 8, wherein the expandable frame of the replacement valve is adapted to engage the groove section of the anchor to form the composite apparatus.

10. The apparatus of claim 1, wherein the replacement valve comprises a valve chosen from the group consisting of mechanical valves, biologic valves, and combinations thereof.

11. The apparatus of claim 10, wherein the replacement valve further comprises an expandable frame coupled to the valve.

12. The apparatus of claim 11, wherein the expandable frame is adapted to couple the replacement valve to the anchor to form the composite apparatus.

13. The apparatus of claim 1, wherein the apparatus is fabricated from a material chosen from the group consisting of stainless steel, spring steel, shape-memory polymers, shape-memory alloys, nickel-titanium alloys, and combinations thereof.

14. The apparatus of claim 1, wherein both the anchor and the replacement valve have collapsed delivery configurations and expanded deployed configurations.

15. The apparatus of claim 14, wherein the anchor and the replacement valve are adapted for expansion from the delivery to the deployed configurations via a mechanism chosen from the group consisting of balloon-expansion, self-expansion, and combinations thereof.

16. The apparatus of claim 14 further comprising a delivery system for endovascularly advancing the anchor and the replacement valve to a vicinity of the patient'"'"'s valve while the anchor and the replacement valve are disposed in the collapsed delivery configuration.

17. The apparatus of claim 16, wherein the delivery system comprises a single catheter.

18. The apparatus of claim 16, wherein the delivery system comprises multiple catheters.

19. The apparatus of claim 16, wherein the delivery system is adapted to facilitate expansion of the anchor and the replacement valve to the deployed configuration and to facilitate coupling of the anchor to the replacement valve to form the composite apparatus.

20. The apparatus of claim 1, wherein the apparatus comprises at least one radiopaque feature adapted to facilitate deployment and in vivo coupling of the anchor to the replacement valve under fluoroscopic guidance.

21. The apparatus of claim 16, wherein the delivery system comprises at least one radiopaque feature adapted to facilitate deployment and in vivo coupling of the anchor to the replacement valve under fluoroscopic guidance.

22. The apparatus of claim 1, wherein the apparatus is adapted to facilitate dynamic repositioning of the apparatus during delivery.

23. The apparatus of claim 1, wherein engagement of the native leaflets is adapted to facilitate positive registration of the anchor relative to the patient'"'"'s heart valve and the patient'"'"'s coronary ostia.

24. The apparatus of claim 1, wherein the composite apparatus is adapted to reduce paravalvular regurgitation.

25. The apparatus of claim 1, wherein the apparatus is configured for percutaneous delivery through the patient'"'"'s aorta without necessitating a transseptal puncture.

26. A method for endovascularly replacing a patient'"'"'s heart valve, the method comprising:

providing apparatus comprising an anchor piece and a replacement valve piece;

endovascularly delivering the anchor piece to a vicinity of the heart valve in a collapsed delivery configuration;

expanding the anchor piece to a deployed configuration;

engaging at least one valve leaflet of the heart valve with the anchor piece;

endovascularly delivering the replacement valve piece to the vicinity of the heart valve in a collapsed delivery configuration;

expanding the replacement valve piece to a deployed configuration; and

coupling the valve piece to the anchor piece in vivo to form composite two-piece apparatus that endovascularly replaces the patient'"'"'s heart valve.

27. The method of claim 26, wherein providing two-piece apparatus further comprises providing two-piece apparatus having at least one radiopaque feature, and wherein endovascularly delivering the anchor and valve pieces further comprises endovascularly delivering the anchor and valve pieces under fluoroscopic guidance.

28. The method of claim 26, wherein engaging at least one the valve leaflet further comprises dynamically repositioning the anchor piece relative to the patient'"'"'s heart valve.

29. The method of claim 26, wherein engaging the at least one valve leaflet further comprises positively registering a position of the anchor piece relative to the patient'"'"'s heart valve and a coronary ostium.

30. The method of claim 26, wherein endovascularly delivering the anchor and valve pieces further comprises endovascularly delivering the anchor and valve pieces with a delivery system comprising a single catheter, the anchor and valve pieces longitudinally separated from one another along a length of the catheter in the collapsed delivery configuration.

31. The method of claim 26, wherein endovascularly delivering the anchor and valve pieces comprises endovascularly delivering the anchor and valve pieces through the patient'"'"'s aorta without necessitating a transseptal puncture.

32. Apparatus for endovascularly replacing a patient'"'"'s heart valve, the apparatus comprising:

an anchor having a first portion of an alignment/locking mechanism; and

a replacement valve having a second portion of the alignment/locking mechanism,

wherein the anchor and the valve are adapted for in vivo expansion and coupling to one another to form composite apparatus that endovascularly replaces the patient'"'"'s heart valve.

33. The apparatus of claim 32, wherein the first and second portions of the alignment/locking mechanism are configured to lockingly form the composite apparatus.

34. The apparatus of claim 32, wherein the anchor comprises a lip section, a groove section and a skirt section.

35. The apparatus of claim 34, wherein the lip section is adapted to engage valve leaflets of the heart valve and preclude distal migration of the composite apparatus.

36. The apparatus of claim 34, wherein the groove section is adapted to couple the anchor to the replacement valve to form the composite apparatus.

37. The apparatus of claim 34, wherein the skirt section is adapted to preclude proximal migration of the composite apparatus.

38. The apparatus of claim 32, wherein the anchor is at least partially covered by a biocompatible film.

39. The apparatus of claim 32, wherein the replacement valve comprises a valve chosen from the group consisting of mechanical valves, biologic valves, and combinations thereof.

40. The apparatus of claim 32, wherein the replacement valve further comprises an expandable frame coupled to the valve.

41. The apparatus of claim 32, wherein both the anchor and the replacement valve have collapsed delivery configurations and expanded deployed configurations.

42. The apparatus of claim 41, wherein the anchor and the replacement valve are adapted for expansion from the delivery to the deployed configurations via a mechanism chosen from the group consisting of balloon-expansion, self-expansion, and combinations thereof.

43. The apparatus of claim 41 further comprising a delivery system for endovascularly advancing the anchor and the replacement valve to a vicinity of the patient'"'"'s valve while the anchor and the replacement valve are disposed in the collapsed delivery configuration.

44. The apparatus of claim 43, wherein the apparatus comprises at least one radiopaque feature adapted to facilitate deployment and in vivo coupling of the anchor to the replacement valve under fluoroscopic guidance.

45. The apparatus of claim 32, wherein the apparatus is at least partially fabricated from a material chosen from the group consisting of stainless steel, spring steel, shape-memory polymers, shape-memory alloys, nickel-titanium alloys, and combinations thereof.

46. A method for endovascularly replacing a patient'"'"'s heart valve, the method comprising:

endovascularly delivering an anchor piece having a first portion of an alignment/locking mechanism to a vicinity of the heart valve in a collapsed delivery configuration;

expanding the anchor piece to a deployed configuration such that the anchor piece displaces the patient'"'"'s heart valve;

endovascularly delivering a replacement valve piece having a second portion of the alignment/locking mechanism to the vicinity of the heart valve in a collapsed delivery configuration;

expanding the replacement valve piece to a deployed configuration; and

coupling the valve piece to the anchor piece in vivo by securing the first and second portions of the alignment/locking mechanism to one another, thereby forming composite two-piece apparatus that endovascularly replaces the patient'"'"'s heart valve.

47. The method of claim 46, wherein providing two-piece apparatus further comprises providing two-piece apparatus having at least one radiopaque feature, and wherein endovascularly delivering the anchor and valve pieces further comprises endovascularly delivering the anchor and valve pieces under fluoroscopic guidance.

48. The method of claim 46, further comprising dynamically repositioning the anchor piece relative to the patient'"'"'s heart valve.

49. The method of claim 46, further comprising positively registering a position of the anchor piece relative to the patient'"'"'s valve and the patient'"'"'s coronary ostia.

50. The method of claim 49 wherein positively registering comprises engaging valve leaflets of the patient'"'"'s heart valve.

51. The method of claim 46, wherein endovascularly delivering the anchor and valve pieces further comprises endovascularly delivering the anchor and valve pieces with a delivery system comprising a single catheter, the anchor and valve pieces longitudinally separated from one another along a length of the catheter in the collapsed delivery configuration.

52. The method of claim 46, wherein endovascularly delivering the anchor and valve pieces comprises endovascularly delivering the anchor and valve pieces through the patient'"'"'s aorta without necessitating a transseptal puncture.