Non-cylindrical prosthetic valve system for transluminal delivery

• US 20070043435A1
• Filed: 05/15/2006
• Published: 02/22/2007
• Est. Priority Date: 11/17/1999
• Status: Abandoned Application

• Current Assignee: Medtronic Corevalve LLC (Medtronic Plc)
• Original Assignee: Medtronic Corevalve LLC (Medtronic Plc)
• Inventors: Nguyen, Than, Seguin, Jacques, Bortlein, Georg, Pannek, Edward
• Application Number:
  US11/434,506
• Publication Number:
  US 20070043435A1
• 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 2/2433 using balloon catheter
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• CPC Class Codes: A61F 2/2439 Expansion controlled by filaments
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• 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 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/0078 hyperboloidal
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2250/0036 differing in thickness
• CPC Class Codes: A61F 2250/0037 differing in height or in length
• CPC Class Codes: A61F 2250/0069 Sealing means

Abstract

A prosthetic valve assembly for use in replacing a deficient native valve comprises a replacement valve supported on an expandable prosthesis frame. If desired, one or more expandable anchors may be used. The prosthesis frame, which entirely supports the valve annulus, valve leaflets, and valve commissure points, is configured to be collapsible for transluminal delivery and expandable to contact the anatomical annulus of the native valve when the assembly is properly positioned. Portions of the prosthesis frame may expand to a preset diameter to maintain coaptivity of the replacement valve and to prevent occlusion of the coronary ostia. The prosthesis frame is compressible about a catheter, and restrained from expanding by an outer sheath. The catheter may be inserted inside a lumen within the body, such as the femoral artery, and delivered to a desired location, such as the heart. When the outer sheath is retracted, the prosthesis frame expands to an expanded position such that the valve and prosthesis frame expand at the implantation site and the anchor engages the lumen wall. The prosthesis frame has a non-cylindrical configuration with a preset maximum expansion diameter region about the valve opening to maintain the preferred valve geometry. The prosthesis frame may also have other regions having a preset maximum expansion diameter to avoid blockage of adjacent structures such as the coronary ostia.

Claims

1. A prosthetic valve assembly, comprising:

a prosthesis frame comprising a first end, a second end, and a middle section therebetween; and

a valve engaged to the prosthesis frame;

wherein the first end comprises a first plurality of elongate structural members and a first plurality of expandable cells, the second end comprises a second plurality of elongate structural members and a second plurality of expandable cells, and the middle section comprises a third plurality of heterogeneous elongate structural members and a third plurality of expandable cells, wherein the expandable cells are defined by the elongate structural members in an enclosed arrangement.

2. The prosthetic valve assembly as in claim 1, wherein the third plurality of expandable cells comprises a third plurality of heterogeneous expandable cells.

3. A prosthetic valve assembly, comprising:

a prosthesis frame comprising a first end, a second end, and a middle section therebetween; and

a valve engaged to the prosthesis frame;

wherein the first end comprises a first plurality of elongate structural members and a first plurality of expandable cells, the second end comprises a second plurality of elongate structural members and a second plurality of expandable cells, and the middle section comprises a third plurality of elongate structural members and a third plurality of heterogeneous expandable cells, wherein the expandable cells are defined by the elongate structural members in an enclosed arrangement.

4. A prosthetic valve assembly, comprising:

an expandable prosthesis frame having a heterogeneous configuration, the expandable prosthesis frame comprising a plurality of elongate structural members and a plurality of cells; and

a valve engaged to the prosthesis frame;

wherein each opening of the plurality of cells comprises an area and a shape and each elongate structural member of the plurality of elongate structural members comprises a length, a width, an axial cross-sectional shape and an axial cross-sectional area.

5. The prosthetic valve assembly of claim 4, wherein the plurality of cells are heterogeneous.

6. The prosthetic valve assembly of claim 4, wherein the plurality of elongate structural member are heterogeneous.

7. The prosthetic valve assembly of claim 5, wherein at least two cells of the plurality of cells have different areas.

8. The prosthetic valve assembly of claim 7, wherein the at least two cells have homogeneous shapes.

9. The prosthetic valve assembly of claim 7, wherein at least three cells of the plurality of cells each have different areas.

10. The prosthetic valve assembly of claim 5, wherein at least two cells have heterogeneous shapes.

11. The prosthetic valve assembly of claim 10, wherein at least three cells have heterogeneous shapes.

12. The prosthetic valve assembly of claim 4, wherein a spacing between a first pair of adjacent cells of the plurality of cells is different from a spacing between a second pair of adjacent cells of the plurality of cells.

13. The prosthetic valve assembly of claim 12, wherein the first pair of adjacent cells and the second pair of adjacent cells have a similar relative orientation on the prosthesis frame.

14. The prosthetic valve assembly of claim 12, wherein the spacing between the first pair of adjacent cells, the spacing between the second pair of adjacent cells and a spacing between a third pair of adjacent cells are each different.

15. The prosthetic valve assembly of claim 6, wherein at least one of the plurality of elongate structural members has a heterogeneous cross-sectional area along its length.

16. The prosthetic valve assembly of claim 6, wherein at least one of the plurality of elongate structural members has a heterogeneous width along its length.

17. The prosthetic valve assembly of claim 6, wherein at least one of the plurality of elongate structural members has a heterogeneous thickness along its length.

18. The prosthetic valve assembly of claim 6, wherein at least one of the plurality of elongate structural members has a heterogeneous cross-sectional shape along its length.

19. The prosthetic valve assembly of claim 6, wherein at least two of the plurality of elongate structural members have different axial cross-sectional areas.

20. The prosthetic valve assembly of claim 6, wherein at least two of the plurality of elongate structural members have different widths.

21. The prosthetic valve assembly of claim 6, wherein at least two of the plurality of elongate structural members have different lengths.

22. The prosthetic valve assembly of claim 6, wherein at least two of the plurality of elongate structural members have different cross-sectional shapes.

23. The prosthetic valve assembly of claim 19, wherein the at least two of the plurality of elongate structural members each lie between two cells of the plurality of cells.

24. The prosthetic valve assembly of claim 19, wherein at least three of the plurality of elongate structural members each have different average axial cross-sectional areas.

25. The prosthetic valve assembly of claim 4, wherein at least two of the elongate structural members have heterogeneous cross-sectional shapes.

26. A prosthetic valve assembly comprising:

a prosthesis frame having a first and second end and having a reduced and expanded configuration, the frame comprising a first zone proximal the first end, a second zone proximal the second end, and a third zone therebetween, said zones positioned axially with respect to each other, wherein the fully expanded diameter of the first zone is different than that of the second zone; and

a valve engaged to the prosthesis frame.

27. The valve assembly of claim 26, wherein the valve is primarily supported by the third zone.

28. The valve assembly of claim 27, wherein the fully expanded diameter of the third zone is less than those of the first and second zones.

29. The valve assembly of claim 28, wherein the third zone comprises a generally concave portion.

30. The valve assembly of claim 26, wherein the prosthesis frame is self-expanding.

31. The valve assembly of claim 26, wherein the first zone of the prosthesis frame is tapered.

32. The valve assembly of claim 26, wherein the second zone comprises a generally bulbous configuration.

33. The valve assembly of claim 26, wherein the first zone comprises a generally tapered configuration.

34. The valve assembly of claim 26, wherein the first zone is adapted to wedge against a patient'"'"'s native valve leaflets.

35. The valve assembly of claim 26, wherein the first zone is adapted to wedge against a patient'"'"'s surgically implanted valve leaflets.

36. The valve assembly of claim 26, wherein the first zone is adapted to deflect one or more commissure posts of a surgically implanted heart valve.

37. The valve assembly of claim 26, wherein no substantial continuous portion of the prosthesis frame is of constant diameter.

38. The valve assembly of claim 32, wherein the second end has a diameter less than the greatest fully expanded diameter of the second zone.

39. The valve assembly of claim 26, wherein the prosthesis frame comprises a plurality of cells defined by one or more structural members, wherein the cells that are configured so as to be expandable.

40. The valve assembly of claim 39, wherein a portion of the plurality of cells are homogeneous in shape.

41. The valve assembly of claim 39, wherein a portion of the plurality of cells are homogeneous in size.

42. The valve assembly of claim 39, wherein a portion of the plurality of cells are homogeneous in structural member configuration.

43. The valve assembly of claim 39, wherein a portion of the plurality of cells are heterogeneous in shape.

44. The valve assembly of claim 39, wherein a portion of the plurality of cells are heterogeneous in size.

45. The valve assembly of claim 39, wherein a portion of the plurality of cells are heterogeneous in structural member configuration.

46. The valve assembly of claim 39, wherein at least some of the structural members have varied cross-sectional configurations along their length.

47. A prosthetic valve assembly for treating a patient, comprising:

a valve for controlling blood flow;

a non-cylindrical means for maintaining and supporting the geometry of the valve means; and

an anchor attached to the non-cylindrical means.

48. The valve assembly of claim 47, wherein the maintaining and supporting means comprises a prosthesis frame comprising a plurality of expandable cells and having a non-uniform diameter along its length.

49. A prosthetic valve assembly comprising a prosthesis frame having a first zone, a second generally bulbous zone having a maximum expanded diameter greater than that of the first zone, and a valve support zone having a maximum expanded diameter smaller than those of the first and second zones.

50. The valve assembly of claim 49, wherein the first zone is tapered.

51. The valve assembly of claim 49, wherein the valve support zone is generally concave in outer configuration.

52. The valve assembly of claim 49 further comprising a valve supported by the valve support zone.

53. The valve assembly of claim 52, wherein the valve is a tri-cuspid tissue valve.

54. The valve assembly of claim 49, wherein the frame is self-expandable.

55. A method of implanting the valve assembly in a patient, the method comprising providing a prosthetic valve assembly comprising a prosthesis frame having a first zone, a second generally bulbous zone having a maximum expanded diameter greater than that of the first zone, and a valve support zone having a maximum expanded diameter smaller than those of the first and second zones, said prosthetic valve assembly mounted onto a catheter suitable for percutaneous and vascular delivery and deploying said valve assembly within an appropriate native lumen of the patient.

56. The method of claim 55, wherein the step of deploying comprises deploying the valve assembly within a previously-implanted prosthetic cardiac valve.

57. A method for treating a patient comprising:

inserting a self-expanding valve into the lumen of a previously-implanted cardiovascular device with a lumen of a patient.

58. The method of treating a patient as in claim 57, wherein the implanted cardiovascular device is a surgically implanted cardiac valve.

59. The method of treating a patient as in claim 57, wherein the implanted cardiovascular device is an aorto-ventricular conduit.

60. The method of treating a patient as in claim 57, further comprising expanding the self-expanding valve against one or more valve leaflets of a patient without contacting a valve annulus of the patient.

61. The method of treating a patient as in claim 58, wherein the surgically implanted cardiac valve comprises at least one commissure post and a bloodflow cross-sectional area.

62. The method of treating a patient as in claim 61, further comprising outwardly deflecting the at least one commissure post.

63. The method of treating a patient as in claim 61, further comprising deflecting the at least one commissure post to increase the bloodflow cross-sectional area.

64. The method of treating a patient as in claim 62, wherein at least a portion of the at least one commissure post is moved at least about 1 mm.

65. The method of treating a patient as in claim 64, wherein at least a portion of the at least one commissure post is moved at least about 1.5 mm.

67. The method of treating a patient as in claim 57, wherein the previously-implanted cardiovascular device comprises a valve leaflet support with a cross-sectional area.

68. The method of treating a patient as in claim 67, further comprising deforming the valve leaflet support to increase the cross-sectional area.

69. The method of treating a patient as in claim 62, wherein at least a portion of the at least one commissure post is deflected at least about 3 degrees.

70. The method of treating a patient as in claim 69, wherein at least a portion of the at least one commissure post is deflected at least about 5 degrees.

71. The method of treating a patient as in claim 70, wherein at least a portion of the at least one commissure post is deflected at least about 10 degrees.

72. The method of treating a patient as in claim 62, wherein at least a portion of the at least one commissure post is deflected from a generally radially inward position to a generally parallel position.

73. The method of treating a patient as in claim 62, wherein at least a portion of the at least one commissure post is deflected from a generally radially inward position to generally radially outward position.

66. The method of treating a patient as in claim 66, wherein at least a portion of the at least one commissure post is moved at least about 2 mm.

74. A method for implanting a cardiovascular device comprising inserting an expandable heart valve into a vascular system of a patient, anchoring the expandable heart valve against a distal surface of one or more valve leaflets of the patient without contacting an annulus surface of the patient.

75. The method for implanting a cardiovascular device of claim 74, wherein the one or more valve leaflets are native valve leaflets.

76. The method for implanting a cardiovascular device of claim 74, wherein the one or more valve leaflets are artificial valve leaflets.

77. A method for implanting a cardiovascular device comprising:

providing a cardiovascular device located on a delivery system;

inserting the delivery system through an aortic arch of a patient from a first arterial access point;

inserting a snare from a second arterial access point;

grasping the delivery system with the snare; and

manipulating the snare to align the delivery system with a lumen of the patient'"'"'s aortic valve.

78. The method for implanting a cardiovascular device as in claim 77, wherein the cardiovascular device is a self-expanding valve.

79. The method for implanting a cardiovascular device as in claim 78, wherein the delivery system comprises a catheter and guidewire.

80. The method for implanting a cardiovascular device as in claim 79, wherein the grasping step comprises grasping the catheter with the snare.

81. The method for implanting a cardiovascular device as in claim 79, wherein the grasping step comprises grasping the guidewire with the snare.

82. The method for implanting a cardiovascular device as in claim 78, wherein the delivery system comprises a catheter with a retaining sheath.

83. The method for implanting a cardiovascular device as in claim 82, wherein the catheter comprises a retaining sheath controller.

84. The method for implanting a cardiovascular device as in claim 83, wherein the retaining sheath controller comprises one or more detents or stops for a defined sheath position.

85. The method for implanting a cardiovascular device as in claim 83, wherein the catheter comprises a multi-rate retaining sheath controller.

86. The method for implanting a cardiovascular device as in claim 82, wherein the catheter comprises one or more longitudinal stiffening elements.

87. The method for implanting a cardiovascular device as in claim 86, wherein the catheter comprises a catheter circumference and two longitudinal stiffening elements located generally on opposite sides of the catheter circumference.

88. The method for implanting a cardiovascular device as in claim 82, wherein the retaining sheath comprises one or more longitudinal stiffening elements.

89. The method for implanting a cardiovascular device as in claim 88, wherein the retaining sheath comprises a retaining sheath circumference and two longitudinal stiffening elements located generally on opposite sides of the retaining sheath circumference.

90. The method for implanting a cardiovascular device as in claim 78, wherein the delivery system comprises a catheter and introducer sheath.

91. The method for implanting a cardiovascular device as in claim 90, wherein the catheter comprises a distal delivery section and a proximal body having a reduced diameter relative to the distal delivery section.

92. The method for implanting a cardiovascular device as in claim 91, wherein the introducer sheath is integrated with the proximal body of the catheter.