Subannular sealing for paravalvular leak protection

• US 10,130,467 B2
• Filed: 05/12/2015
• Issued: 11/20/2018
• Est. Priority Date: 05/16/2014
• Status: Active Grant

• Current Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories Incorporated)
• Inventors: Braido, Peter N., Smith, Kent J., McCarthy, Andrea L., Para, Andrea N., Khouengboua, Sounthara (Ott), Benson, Thomas M., Kumar, Saravana B., Moseman, Bruce, Satam, Gaurav
• Primary Examiner(s): Sharma, Yashita
• Application Number:
  US15/310,915
• Publication Number:
  US 20170086971A1
• Time in Patent Office: 1,288 Days
• Field of Search: 623 11- 31
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• 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 2230/001 Figure-8-shaped, e.g. hourglass-shaped
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2250/0036 differing in thickness
• CPC Class Codes: A61F 2250/0069 Sealing means
• CPC Class Codes: H05K 999/99 dummy group

Abstract

A prosthetic heart valve for replacing a native valve includes a collapsible and expandable stent extending between a proximal end and a distal end. The stent includes an annulus section adjacent the proximal end and having a first diameter, a plurality of first struts forming cells, and a plurality of second struts connected to the annulus section and forming a plurality of deflecting cells expandable to define a second diameter larger than the first diameter. A valve assembly is disposed within the stent and a cuff is coupled to the stent and covers the plurality of deflecting cells.

Claims

1. A prosthetic heart valve for replacing a native valve, comprising:

a collapsible and expandable stent extending between a proximal end and a distal end and including an annulus section adjacent the proximal end and having a first diameter, the stent including a plurality of first struts forming cells, and a plurality of projecting struts joined to proximal-most cells, each of the projecting struts having a free end and an attached end joined to an intersection of first struts, the plurality of projecting struts being arranged in pairs, each projecting strut of a particular pair of projecting struts being attached to a same intersection of first struts;

a valve assembly disposed within the stent; and

a cuff coupled to the stent and covering the projecting struts.

2. The prosthetic heart valve of claim 1, wherein each of the projecting struts includes an eyelet disposed at the free end.

3. The prosthetic heart valve of claim 1, wherein a first projecting strut of a first pair of projecting struts is capable of moving independently of a second projecting strut of the first pair of projecting struts.

4. The prosthetic heart valve of claim 1, wherein the projecting struts have an oblique angle with respect to a longitudinal axis of the stent in the absence of external forces.

5. The prosthetic heart valve of claim 1, wherein the cuff is at least partially disposed on an abluminal surface of the stent.

6. The prosthetic heart valve of claim 1, wherein the cuff is at least partially disposed on a luminal surface of the stent.

7. The prosthetic heart valve of claim 4, wherein the angle of the projecting struts is between 15 degrees and 35 degrees from the longitudinal axis of the stent.

8. The prosthetic heart valve of claim 1, wherein the free ends of the projecting struts are positioned proximal of all of the first struts in a collapsed condition of the stent.

9. The prosthetic heart valve of claim 1, wherein the cells formed by the plurality of first struts are diamond-shaped.

10. The prosthetic heart valve of claim 1, wherein every node in the proximal-most annular row of cells includes one pair of projecting struts attached thereto.

11. The prosthetic heart valve of claim 1, wherein the projecting struts are integrally formed with the stent.

12. The prosthetic heart valve of claim 1, wherein the projecting struts are formed separately from the stent and are affixed to the stent.

13. The prosthetic heart valve of claim 2, wherein a portion of the cuff is coupled to the eyelets of the projecting struts.

14. The prosthetic heart valve of claim 13, wherein in the absence of external forces, the portion of the cuff coupled to the eyelets of the projecting struts has a second diameter greater than the first diameter.