Stents for Prosthetic Heart Valves

• US 20110264196A1
• Filed: 04/25/2011
• Published: 10/27/2011
• Est. Priority Date: 04/23/2010
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Savage, Padraig, Rust, Matthew, Rinne, Finn, Pellegrini, Gianfranco, Krivoruchko, Michael
• Granted Patent: US 8,623,079 B2
• Time in Patent Office: Days
• US Class Current: 623/1.26
• 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;

at least one outflow barb extending from the outer surface of the stent structure 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 structure adjacent to the outflow end of the stent structure and toward the inflow end of the stent structure; and

a valve structure attached within the interior area of the stent structure, the valve structure comprising a plurality of leaflets.

2. The stented valve of claim 1, wherein each of the inflow and outflow barbs comprises a distal end that is spaced from the outer surface of the stent structure.

3. The stented valve of claim 2, wherein the distal end of each of the inflow and outflow barbs comprises a tip that is sharp enough to penetrate tissue.

4. The stented valve of claim 1, wherein each of the inflow and outflow barbs extends in a direction that is generally parallel to the longitudinal axis of the stent structure.

5. The stented valve of claim 1, wherein the outer surface of the stent structure further comprises a concave saddle area between the first and second ends.

6. The stented valve of claim 5, wherein each of the inflow and outflow barbs extends from the outer surface of the stent structure at a proximal end of the barbs, and wherein the concave saddle area is located between the proximal ends of the inflow barbs and the proximal ends of the outflow barbs.

7. The stented valve of claim 1, wherein the first end of the stent structure has a diameter that is larger than a diameter of the second end of the stent structure.

8. 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.

9. The stented valve of claim 1, 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.

10. 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.

11. The stented valve of claim 1, 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.

12. The stented valve of claim 11, further comprising twelve diamond-shaped structures at the second end of the stent structure and six diamond-shaped structures at the first end of the stent structure.

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

14. A stented valve comprising:

a stent structure comprising a generally tubular body portion, an interior area, a longitudinal axis, an outflow end, an inflow end, an outer surface, and a plurality of diamond-shaped structures at both the inflow and outflow ends, wherein the plurality of diamond-shaped structures at the inflow end comprise multiple adjacent V-shaped wire structures that extend from each other around a circumference of the inflow end of the stent structure, and wherein the plurality of diamond-shaped structures at the outflow end comprise multiple adjacent V-shaped wire structures that extend from each other around a circumference of the outflow end of the stent structure;

at least one inflow barb extending from a distal end of one of the V-shaped wire structures of the inflow end, spaced from the inflow end of the stent structure, and extending toward the outflow end of the stent structure;

at least one outflow barb extending toward the inflow end of the stent structure from an intersection point of one of the diamond shaped structures at the outflow end of the stent structure, wherein the intersection point to which the at least one outflow barb is attached is spaced from a distal edge of the outflow end of the stent structure; and

a valve structure attached within the interior area of the stent structure, the valve structure comprising a plurality of leaflets.

15. The stented valve of claim 14, wherein the outer surface of the stent structure further comprises a concave saddle area between the first and second ends, and wherein each of the inflow barbs comprises a distal end spaced from the concave saddle area of the stent structure.

16. The stented valve of claim 14, wherein the outer surface of the stent structure further comprises a concave saddle area between the first and second ends, and wherein each of the outflow barbs comprises a distal end spaced from the concave saddle area of the stent structure.

17. The stented valve of claim 14, further comprising at least one auxiliary outflow barb, wherein each auxiliary barb extends from an intersection point of one of the diamond-shaped structures that is adjacent to the plurality of diamond-shaped structures at the outflow end of the stent structure.

18. A method of percutaneously implanting a stented valve, comprising the steps of:

compressing a stented valve onto a delivery system, the stented valve comprising;

a stent structure comprising a generally tubular body portion, an interior area, a longitudinal axis, an outflow end, an inflow end, and an outer surface;

at least one outflow barb extending from the outer surface of the stent adjacent to the outflow end of the stent structure and toward the inflow end of the stent structure;

at least one inflow barb extending from the outer surface of the stent adjacent to the inflow end of the stent structure and toward the outflow end of the stent structure; and

a valve structure attached within the interior area of the stent structure, the valve structure comprising a plurality of leaflets;

sliding a sheath over the stented valve;

delivering the stented valve to an implantation location;

longitudinally sliding the sheath relative to the longitudinal axis of the stent structure to expose the stented valve and allow the stented valve to expand; and

moving the delivery system toward the inflow end of the stent until the outflow barbs engage with tissue at the implantation area.

19. The method of claim 18, further comprising the step of moving the delivery system toward the outflow end of the stent until the inflow barbs engage with tissue at the implantation area.

20. The method of claim 18, wherein the outer surface of the stent structure further comprises a concave saddle area between the inflow and outflow ends, and wherein each of the outflow barbs comprises a distal end spaced from the concave saddle area of the stent structure.