Stents for prosthetic heart valves

• US 8,673,000 B2
• Filed: 05/20/2011
• Issued: 03/18/2014
• Est. Priority Date: 01/24/2008
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Tabor, Charles, Eberhardt, Carol E., Laske, Timothy G., Ryan, Timothy R., Morrow, Joseph C., Tam, Tammy Y., Glynn, Brian A., Brody Rubin, Anne L., Tuchek, J. Michael
• Primary Examiner(s): GHERBI, SUZETTE JAIME J
• Application Number:
  US13/112,656
• Publication Number:
  US 20110224780A1
• Time in Patent Office: 1,033 Days
• Field of Search: 623/1.24, 623 21- 219
• US Class Current: 623/2.17
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• 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 2220/0091 connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2250/0018 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2250/003 differing in adsorbability or resorbability, i.e. in adsorption or resorption time
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

A stented valve including a generally tubular stent structure that has a longitudinal axis, first and second opposite ends, a plurality of commissure support structures spaced from the first and second ends and extending generally parallel to the longitudinal axis, at least one structural wire positioned between each two adjacent commissure support structures, and at least one wing portion extending from two adjacent commissure support structures and toward one of the first and second ends of the stent structure. The stented valve further includes a valve structure attached within the generally tubular stent structure to the commissure support structures.

Claims

1. A stented valve comprising:

a generally tubular stent structure comprising a longitudinal axis, first and second opposite ends, a plurality of commissure support structures spaced apart from each of the first and second ends of the stent structure and extending generally parallel to the longitudinal axis, at least one structural wire positioned between each two adjacent commissure support structures, and at least one wing portion extending from two adjacent commissure support structures and toward one of the first and second ends of the stent structure; and

a valve structure comprising a plurality of leaflets, wherein each leaflet comprises a first end, a second end, and a free edge extending between the first and second ends, wherein a first end of each leaflet is attached to one of the commissure support structures and wherein a second end of each leaflet is attached to an adjacent commissure support structure.

2. The stented valve of claim 1, wherein the at least one wing portion extends from two adjacent commissure support structures at an angle relative to the longitudinal axis.

3. The stented valve of claim 1, wherein the at least one wing portion comprises multiple wing portions.

4. The stented valve of claim 3, wherein the multiple wing portions extend from each other as a continuous wire structure.

5. The stented valve of claim 1, wherein at least one of the commissure support structures comprises a first bar that is spaced from and generally parallel to a second bar.

6. The stented valve of claim 5, further comprising at least one cross member extending between the first and second bars to form at least two openings between the bars.

7. The stented valve of claim 1, further comprising at least two frame wires extending at an angle from a first end of each commissure support structure and toward a first end of the stent structure, and at least two frame wires extending at an angle from a second end of each commissure support structure and toward a second end of the stent structure.

8. A generally tubular stent structure comprising a longitudinal axis, first and second opposite ends, and a plurality of wire segments extending from each other between the first and second ends, wherein a portion of the stent structure comprises a sinusoidal curve shape relative to the longitudinal axis,

wherein the stent structure comprises a generally linear portion extending from the first end toward the second end, and wherein the portion that has a sinusoidal curve shape comprises a first portion that curves outwardly from the linear portion relative to the longitudinal axis and that extends from the linear portion, a second portion that curves back inwardly from the first portion relative to the longitudinal axis and that extends from the first portion, and a third portion that curves back outwardly from the second portion relative to the longitudinal axis and that extends from the second portion, and

wherein the first portion defines a first circumferential wing that extends around at least a portion of a circumference of the stent structure.

9. The stent structure of claim 8, wherein the third portion defines a second circumferential wing that extends around at least a portion of the circumference of the stent structure.

10. The stent structure of claim 8, further comprising a valve structure positioned within an interior opening of the stent structure, wherein the valve structure comprises a plurality of leaflets that are attached within the generally linear portion.

11. The stent structure of claim 8, wherein the generally linear portion comprises a plurality of coronary openings having a lower wire density than a wire density of areas of the linear portion that are adjacent to the coronary openings.

12. The stent structure of claim 8, further comprising a groove in the portion having the sinusoidal curve shape, wherein the groove is positioned generally around the periphery of the stent structure in a shape that comprises three scalloped portions.

13. The stent structure of claim 12, further comprising a gasket positioned within the groove.

14. The stent structure of claim 8, further comprising an integrally-formed wire structure that comprises the plurality of wire segments.

15. A stent assembly comprising:

a stented valve comprising a tubular stent frame having a first end and a second end, and a plurality of commissure posts longitudinally extending from a first end of the stent frame, and a valve structure comprising a plurality of leaflets, wherein the valve structure is secured within an internal opening of the stent frame;

an elongated tether extending longitudinally from a distal end of each of the commissure posts, wherein each tether comprises a distal end that is spaced from the distal end of the commissure post from which it extends; and

a stent graft positioned between the tethers and spaced from the distal end of the commissure posts.

16. The stent assembly of claim 15, wherein the stent graft is radially expandable and compressible.

17. The stent assembly of claim 15, wherein at least one of the elongated tethers comprises an anchor member extending from its distal end and protruding outwardly relative to a longitudinal axis of the stent assembly.

18. The stent assembly of claim 15, wherein the stent graft comprises a plurality of wire structures that are longitudinally spaced from each other, and wherein each of the wire structures is attached to a flexible material that allows for a high degree of conformity with a native anatomy curvature.

19. The stent assembly of claim 18, wherein the flexible material comprises at least one of a fabric, a polymer, and a tissue.

20. The stent assembly of claim 15, further comprising a gasket adjacent to the second end of the stent frame.

21. The stent assembly of claim 15, further comprising an embolic protection device spaced distally from the stent graft, wherein the embolic protection device comprises emboli-capturing material.