Stents for prosthetic heart valves

• US 9,649,191 B2
• Filed: 12/09/2013
• Issued: 05/16/2017
• Est. Priority Date: 04/23/2010
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Pellegrini, Gianfranco, Rinne, Finn, Rust, Matthew, Savage, Padraig, Krivoruchko, Michael
• Primary Examiner(s): Isabella, David
• Assistant Examiner(s): Ganesan, Suba
• Application Number:
  US14/100,984
• Publication Number:
  US 20140100653A1
• Time in Patent Office: 1,254 Days
• Field of Search: 623 114, 623 124, 623 13, 623 131, 623 136, 623 21- 219
• 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 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/0017 Angular shapes
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

A stented valve including a stent structure having a generally tubular body portion, an interior area, a longitudinal axis, an first end, an second end, and an outer surface; at least one outflow barb extending from the outer surface of the stent adjacent to the first end of the stent structure and toward the second end of the stent structure; at least one inflow barb extending from the outer surface of the stent adjacent to the second end of the stent structure and toward the first end of the stent structure; and a valve structure attached within the interior area of the stent structure.

Claims

1. A stented valve comprising:

a stent structure comprising a generally tubular body portion, an interior area, a longitudinal axis, a first end, a second end, and an outer surface,

the outer surface of the stent structure comprising a concave saddle area between the first and second ends; and

at least one inflow barb extending from the outer surface of the stent structure adjacent to and spaced from the second end of the stent structure and toward the first end of the stent structure, wherein the at least one inflow barb extends over at least a portion of the concave saddle area of the stent structure;

wherein the interior area of the stent structure is configured to receive a valve structure comprising a plurality of leaflets,

wherein a first end diameter at the first end of the stent structure is greater than a second end diameter at the second end of the stent structure,

wherein the first and second ends of the stent structure comprise a plurality of stent crowns, and wherein the number of crowns at the second end is greater than the number of crowns at the first end,

wherein the stent structure includes a first row of diamond-shaped structures at the first end, the first row of diamond-shaped structures defining the plurality of stent crowns at the first end, and

wherein the stent structure includes a second row of diamond-shaped structures adjacent the first row of diamond-shaped structures, wherein circumferentially adjacent diamond-shaped structures of the second row of diamond-shaped structures are spaced around a circumference of the stent structure such that the circumferentially adjacent diamond shaped structures of the second row of diamond-shaped structures do not contact each other.

2. The stented valve of claim 1, wherein the at least one inflow barb comprises a plurality of inflow barbs spaced from each other around the periphery of the outer surface of the stent structure.

3. The stented valve of claim 1, wherein the stent structure comprises a wire frame, and wherein an area adjacent to the first end of the stent structure comprises a lower wire density than an area adjacent the second end of the wire frame.

4. The stented valve of claim 3, wherein the second end of the wire frame comprises a lower wire density than the concave saddle area.

5. The stented valve of claim 1, wherein the first row of diamond-shaped structures consists of six diamond-shaped structures and wherein the second end of the stent structure includes a second end row of diamond-shaped structures consisting of twelve diamond-shaped structures.

6. The stented valve of claim 5, wherein the at least one inflow barb extends from a junction of circumferentially adjacent diamond-shaped structures of the second end row of diamond-shaped structures.

7. The stented valve of claim 1, wherein the first end comprises an outflow end of the stent structure, and wherein the second end comprises an inflow end of the stent structure.

8. The stented valve of claim 1, wherein the first end diameter and the second end diameter are both greater than a diameter of the concave saddle area.

9. The stented valve of claim 1, further comprising at least one outflow barb extending from the outer surface of the stent structure adjacent to and spaced from the first end of the stent structure and extending toward the second end of the stent structure, wherein the at least one outflow barb extends over at least a portion of the concave saddle area of the stent structure.

10. The stented valve of claim 9, wherein each of the inflow and outflow barbs comprises a distal end that is spaced from the outer surface of the stent structure.

11. The stented valve of claim 10, wherein the distal end of each of the inflow and outflow barbs comprises a tip that is sharp enough to penetrate tissue.

12. The stented valve of claim 9, wherein each of the inflow and outflow barbs extends from the outer surface of the stent structure at a junction point, and wherein the concave saddle area is located between the junction points for the inflow barbs and the junction points for the outflow barbs.

13. The stented valve of claim 9, wherein the at least one outflow barb comprises a plurality of outflow barbs spaced from each other around the periphery of the outer surface of the stent structure.

14. The stented valve of claim 9, wherein each of the inflow and outflow barbs extends at an angle away from the longitudinal axis of the stent structure.

15. The stented valve of claim 9, wherein the stent structure includes a third row of diamond-shaped structures adjacent the first row of diamond-shaped structures, wherein the at least one outflow barb extends from a junction between the first row of diamond-shaped structures and the third row of diamond-shaped structures.