STENT CELL BRIDGE FOR CUFF ATTACHMENT

• US 20180071090A1
• Filed: 11/17/2017
• Published: 03/15/2018
• Est. Priority Date: 06/10/2014
• Status: Active Grant

• Current Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories)
• Original Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories)
• Inventors: Khouengboua, Sounthara (OTT), Benson, Thomas Mark, Li, Xue Mei
• Granted Patent: US 10,433,957 B2
• Time in Patent Office: Days
• 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 2/2418 Scaffolds therefor, e.g. support stents
• 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 stent extending from an inflow end to an outflow end, and a cuff having an inflow end an outflow end. The stent includes first and second circumferential rows of cells defined by first and second pluralities of struts, respectively. The second circumferential row is positioned closer to the outflow end of the stent than the first circumferential row. At least one cell in the second circumferential row includes by a first strut opposed to a fourth strut and a second strut opposed to a third strut. A bridging feature in at least one cell in the second circumferential row includes first and second supplemental struts extending across an intermediate portion of the cell. The outflow end of the cuff is coupled to the stent along the bridging feature.

Claims

1. A prosthetic heart valve, comprising:

a stent having a collapsed condition and an expanded condition and extending from an inflow end to an outflow end, the stent having a plurality of rows of cells extending around a circumference of the stent, each cell formed by a plurality of cell struts, selected cells including a bridging feature, the bridging feature including a first supplemental strut and a second supplemental strut, first ends of the first and second supplemental struts being coupled to cell struts of the selected cell, a second end of the first supplemental strut coupled to a second end of the second supplemental strut;

a valve assembly disposed within the stent; and

a cuff having an inflow end and an outflow end, selected portions of the outflow end of the cuff being coupled to the stent along the bridging features,

wherein the selected cells each define a surface, and each bridging feature extends radially outward of the corresponding surface in the absence of applied forces.

2. The prosthetic heart valve of claim 1 the bridging features are “

V”

-shaped.

3. The prosthetic heart valve of claim 1, wherein the second ends of the first and second supplemental struts together form a valley pointing toward the inflow end of the stent.

4. The prosthetic heart valve of claim 1, wherein the plurality of rows of cells include a first row of cells and a second row of cells adjacent the first row of cells, the first row of cells being positioned nearer the inflow end of the stent than is the second row of cells.

5. The prosthetic heart valve of claim 4, wherein the cuff fully covers at least one cell in the first circumferential row.

6. The prosthetic heart of claim 4, wherein the cuff fully covers at least one cell in the second circumferential row.

7. The prosthetic heart valve of claim 1, wherein at least two adjacent cells in the second circumferential row include the bridging feature.

8. The prosthetic heart valve of claim 1, wherein at least two adjacent cells in a first group of cells in the second circumferential row include the bridging feature and at least two adjacent cells in a second group of cells in the second circumferential row include the bridging feature, the first group of cells and the second group of cells being separated by at least one cell without the bridging feature.

9. The prosthetic heart valve of claim 1, wherein a first portion of the one cell is covered so as to prevent blood from flowing therethrough and a second portion of the one cell is open so as to allow blood to flow therethrough, the first portion being positioned closer to the inflow end of the stent than the second portion.

10. The prosthetic heart valve of claim 1, wherein the bridging features has a collapsed condition in the collapsed condition of the stent and an expanded condition in the expanded condition of the stent, the collapsed condition of the bridging feature being different than the expanded condition of the bridging feature.

11. The prosthetic heart valve of claim 1, wherein the selected cells are diamond shaped.

12. The prosthetic heart valve of claim 1, wherein the selected cells include a first strut and a second strut joined together at a first apex pointing toward the outflow end of the stent, and a third strut and a fourth strut joined together at a second apex pointing toward the inflow end of the stent.

13. The prosthetic heart valve of claim 12, wherein the first end of the first supplemental strut is coupled to the first strut and the first end of the second supplemental strut is coupled to the second strut.

14. The prosthetic heart valve of claim 12, wherein the first ends of the first and second supplemental struts are positioned nearer the first apex than the second apex.

15. The prosthetic heart valve of claim 1, wherein the selected portions of the outflow end of the cuff are positioned radially outward of the surface in the absence of applied forces.

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

17. The prosthetic heart valve of claim 1, wherein the cuff is positioned on an abluminal surface of the stent.

18. The prosthetic heart valve of claim 1, wherein the cuff is positioned on a luminal surface of the stent and an abluminal surface of the stent.

19. A prosthetic heart valve, comprising:

a stent having a collapsed condition and an expanded condition and extending from an inflow end to an outflow end, the stent having a plurality of rows of cells extending around a circumference of the stent, each cell formed by a plurality of cell struts, selected cells including a “

V”

-shaped strut member coupled to cell struts of the selected cell;

a valve assembly disposed within the stent; and

a cuff having an inflow end and an outflow end, selected portions of the outflow end of the cuff being coupled to the stent along the “

V”

-shaped strut member,

wherein the selected cells each define a surface, and portions of the “

V”

-shaped strut member extend radially outward of the corresponding surface in the absence of applied forces so that the selected portions of the outflow end of the cuff are positioned radially outward of the corresponding surface in the absence of applied forces.