STENTS WITH ANCHORING SECTIONS

• US 20170079785A1
• Filed: 05/20/2015
• Published: 03/23/2017
• Est. Priority Date: 05/22/2014
• Status: Active Grant

• Current Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories)
• Original Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories)
• Inventors: Li, XueMei
• Granted Patent: US 10,500,042 B2
• Time in Patent Office: Days
• CPC Class Codes: A61F 2/2409 Support rings therefor, e.g. for connecting valves to tissue annuloplasty rings A61F2/2442
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2230/0034 D-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2250/0069 Sealing means

Abstract

A stent (300, 400, 400′) for a prosthetic heart valve includes a body having an inflow end (310, 410) and an outflow end (312, 412), and an anchoring section (340, 440) adjacent the inflow end. The anchoring section may include structure (342, 344, 420) that extends radially outwardly from the body when the stent is in an expanded condition. The stent may include a transition section (370, 470) between the body and the anchoring section, the transition section in the expanded condition of the stent having a diameter that is smaller than the diameters of the body and the anchoring section. When implanted into a native valve annulus, such as the mitral valve annulus, the anchoring section may help the stent resist migrating away from the native valve annulus.

Claims

1. A stout having a collapsed condition and an expanded condition, the stent comprising:

a body having an outflow and an inflow end; and

an anchoring section adjacent the inflow end and including a first annular disc and a second annular disc, the first annular disc and the second annular disc each extending radially outwardly from the body when the stent is in the expanded condition.

2. The stent of claim 1, wherein the first disc has a smaller diameter than the second disc when the stent is in the expanded condition.

3. The stent of claim 2, wherein the second disc is positioned farther away from the outflow end than the first disc.

4. The stent of claim 1, wherein the first disc and the second disc are each formed of a braided material.

5. The stent of claim 4, wherein the braided material is Nitinol.

6. The stent of claim 1, wherein the anchoring section includes a gap between the first disc and the second disc when the stent is in the expanded condition.

7. The stent of claim 1, wherein the first disc is integral with the second disc.

8. The stent of claim 7, wherein the first disc and the second disc are each integral with the body.

9. The stent of claim 1, wherein there is substantially no overlap between the first disc and the body when the stent is in the collapsed condition.

10. The stent of claim 1, wherein the first disc flares away from the outflow end and the second disc flares toward the outflow end when the stent is in the expanded condition.

11. The stent of claim 1, wherein the first disc and the second disc each extend at an angle of about 90 degrees from a longitudinal axis of the body when the stent is in the expanded condition.

12. A prosthetic heart valve comprising:

the stent of claim 1; and

at least two prosthetic heart valve leaflets positioned within the body.

13. The prosthetic heart valve of claim 12, wherein the at least two prosthetic heart valve leaflets are configured to be in a supraannular position with respect to a native valve annulus when implanted.

14. A stent having a collapsed condition and an expanded condition, the stent comprising:

a body having a longitudinal axis, an outflow end, an inflow end, and a diameter in the expanded condition of the stent;

an anchoring section adjacent the inflow end, the anchoring section having a diameter in the expanded condition of the stent; and

a transition section between the body and the anchoring section, the transition section in the expanded condition of the stent having a diameter that is smaller than the diameter of the body and smaller than the diameter of the anchoring section,

wherein the anchoring section extends radially outwardly from the longitudinal axis of the body when the stent is in the expanded condition.

15. The stent of claim 14, wherein the anchoring section includes a plurality of struts forming cells.

16. The stent of claim 14, wherein the anchoring section is integral with the body.

17. The stent of claim 14, wherein the anchoring section extends radially outwardly from the longitudinal axis of the body at an angle of between about 80 degrees and about 100 degrees when the stent is in the expanded condition.

18. The stent of claim 14, wherein the anchoring section extends radially outwardly from the longitudinal axis of the body at an angle of about 90 degrees when the stent is in the expanded condition.

19. The stent of claim 14, wherein the body is substantially cylindrical.

20. The stent of claim 14, wherein the body has a center portion between the inflow end and the outflow end, the center portion having a circumference that is larger than a circumference of the body on either side of the center portion when the stent is in the expanded condition.

21. A prosthetic heart valve comprising:

the stent of claim 14; and

at least two prosthetic heart valve leaflets positioned within the body.

22. The prosthetic heart valve of claim 21, wherein the at least two prosthetic heart valve leaflets are configured to be in a supraannular position with respect to a native valve annulus when implanted.