SELF-EXPANDING HEART VALVES FOR CORONARY PERFUSION AND SEALING

• US 20170079786A1
• Filed: 05/20/2015
• Published: 03/23/2017
• Est. Priority Date: 05/21/2014
• Status: Active Grant

• Current Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories Incorporated)
• Inventors: Li, Xue Mei, Alkhatib, Yousef F.
• Granted Patent: US 10,321,993 B2
• Time in Patent Office: Days
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2230/001 Figure-8-shaped, e.g. hourglass-shaped
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2250/0037 differing in height or in length
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61F 2250/0069 Sealing means

Abstract

A prosthetic heart valve includes a collapsible and expandable stent including a plurality of struts forming cells, the stent having a proximal end, a distal end, an annulus section adjacent the proximal end, an aortic section adjacent the distal end, and a transition section disposed between the annulus section and the aortic section, the aortic section having a larger diameter than the annulus section. The heart valve further includes a valve assembly disposed entirely in the annulus section of the stent for controlling the flow of blood through the stent, the valve assembly including a plurality of leaflets, and a cuff, the cuff being disposed on a surface of the stent and extending fully over at least two rows of cells of the stent.

Claims

1. A prosthetic heart valve, comprising:

a collapsible and expandable stent including a plurality of struts forming cells, the stent having a proximal end, a distal end, an annulus section adjacent the proximal end, an aortic section adjacent the distal end, and a transition section disposed between the annulus section and the aortic section, the aortic section having a larger diameter than the annulus section; and

a valve assembly disposed entirely in the annulus section of the stent for controlling the flow of blood through the stent, the valve assembly including a plurality of leaflets, and a cuff, the cuff being disposed on a surface of the stent and extending fully over at least two rows of cells of the stent.

2. The prosthetic heart valve of claim 1, wherein the cuff is disposed on a luminal surface of the stent.

3. The prosthetic heart valve of claim 1, wherein the cuff is disposed about an abluminal surface of the stent.

4. The prosthetic heart valve of claim 1, wherein the at least two rows of cells are disposed in the annulus section the stent.

5. The prosthetic heart valve of claim 1, wherein the stent includes a plurality of commissure features and the at least two rows of cells include a first row and a second row, the second row having a plurality of primary cells and a plurality of undersized cells, each of the primary cells being disposed directly below one of the commissure features of the stent.

6. The prosthetic heart valve of claim 5, wherein the stent includes three of the commissure features.

7. The prosthetic heart valve of claim 1, wherein the at least two rows of cells include a first row adjacent the proximal end of the stent and a second row, the second row having a plurality of undersized cells that are smaller than cells of the first row.

8. The prosthetic heart valve of claim 1, wherein cells in the transition section of the stent remain uncovered by the cuff to allow blood flow therethrough.

9. The prosthetic heart valve of claim 1, wherein cells in the transition section are larger than cells in the annulus section.

10. The prosthetic heart valve of claim 1, wherein the transition section includes cells having an asymmetric shape having an odd number of struts.

11. A prosthetic heart valve, comprising:

a collapsible and expandable stent including a plurality of struts forming cells, the stent having a proximal end, a distal end, an annulus section adjacent the proximal end, an aortic section adjacent the distal end, a transition section disposed between the annulus section and the aortic section, a plurality of commissure features and a plurality of axial struts oriented parallel to a longitudinal axis of the stent;

a valve assembly disposed entirely in the annulus section of the stent for controlling the flow of blood through the stent, the valve assembly including a plurality of leaflets and a cuff, the cuff being disposed on a surface of the stent and extending fully over at least two rows of cells of the stent.

12. The prosthetic heart valve of claim 11, wherein the plurality of axial struts are disposed in the transition section.

13. The prosthetic heart valve of claim 11, wherein the transition section includes multiple groups of cells, each group being disposed between adjacent commissure features and including a hexagonal cell and two asymmetric cells having an odd number of struts.

14. The prosthetic heart valve of claim 11, wherein the annulus section includes undersized cells having a first group of struts with a first length and a second group of struts with a length less than the first length and the plurality of axial struts are coupled to struts in the second group.

15. The prosthetic heart valve of claim 11, wherein each of the axial struts has a length that is greater than a length of one of the plurality of commissure features.

16. The prosthetic heart valve of claim 11, wherein the transition section includes multiple groups of cells, each group being disposed between adjacent commissure features and including three hexagonal cells.

17. The prosthetic heart valve of claim 11, further comprising an auxiliary strut disposed below each of the plurality of commissure features.

18. The prosthetic heart valve of claim 17, wherein the annulus section includes undersized cells having a first group of struts with a first length and a second group of struts with a length less than the first length, the struts in the second group being coupled to at least one of the plurality of axial struts or to one of the auxiliary struts.

19. The prosthetic heart valve of claim 18, wherein the annulus section includes at least one full row of the undersized cells, and the cuff extends fully over the full row of undersized cells.

20. The prosthetic heart valve of claim 17, wherein each of the axial struts has a length that is equal to the sum of a length of one of the plurality of commissure features and a length of one of the auxiliary struts.