Sealing structures for paravalvular leak protection

Patent metadata

Field	Value
Publication number	US-12433746-B2
Application number	US-202318481548-A
Country	US
Kind code	B2
Filing date	Oct 5, 2023
Priority date	Nov 19, 2013
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A prosthetic heart valve for replacing a native valve includes a collapsible and expandable stent having a proximal end and a distal end, and a valve assembly disposed within the stent, the valve assembly including a plurality of leaflets and a cuff annularly disposed about the stent. The cuff includes a surplus portion capable of forming a sealing structure having a diameter greater than a diameter of the proximal end of the stent when deployed.

First claim

The invention claimed is:

1. A prosthetic heart valve for replacing a native valve, comprising:
a collapsible and expandable stent having a proximal end, a first section adjacent the proximal end, a distal end, a second section adjacent the distal end, a plurality of struts forming rows of cells, the stent in a deployed condition having a first diameter adjacent the proximal end and a second diameter adjacent the distal end, the second diameter being greater than the first diameter;
a valve assembly disposed within the stent, the valve assembly including a plurality of leaflets, each leaflet having an attached edge and a free edge, and a valve cuff annularly disposed on a surface of the stent to cover at least one of the rows of cells; and
a surplus cuff portion extending proximally past a proximal-most row of cells and being formed of a thickened material that is configured to circumferentially buckle at predetermined locations to form an undulating sealing ring including a series of alternating peaks that extend toward the distal end and valleys that extend toward the proximal end.

2. The prosthetic heart valve as claimed in claim 1 , wherein the surplus cuff portion is unitary with the valve cuff.

3. The prosthetic heart valve as claimed in claim 1 , wherein the surplus cuff portion extends from the proximal-most row of cells by at least 5 mm.

4. The prosthetic heart valve as claimed in claim 1 , wherein the surplus cuff portion extends from the proximal-most row of cells by between 5 mm and 20 mm.

5. The prosthetic heart valve as claimed in claim 1 , wherein the surplus cuff portion is configured to circumferentially buckle in an accordion-like fashion.

6. The prosthetic heart valve as claimed in claim 1 , further comprising terminal sutures configured to attach portion of surplus cuff to selected struts of the stent.

7. The prosthetic heart valve as claimed in claim 6 , wherein the terminal sutures are also used to attach the valve cuff to the stent.

8. The prosthetic heart valve as claimed in claim 1 , wherein the surplus cuff portion is configured to radially expand to a diameter greater than the first diameter.

9. The prosthetic heart valve as claimed in claim 1 , wherein the surplus cuff portion comprises porcine pericardial tissue.

10. The prosthetic heart valve as claimed in claim 1 , wherein the surplus cuff portion comprises UHMWPE.

11. The prosthetic heart valve as claimed in claim 1 , wherein the surplus cuff portion comprises PET fabric.

12. The prosthetic heart valve as claimed in claim 1 , wherein the surplus cuff portion is formed of a same material as the valve cuff.

Assignees

• St Jude Medical Cardiology Div Inc

Inventors

• Braido Peter N

Classifications

• A61F2250/0069

  Sealing means · CPC title

• A61F2230/0091

  helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section · CPC title

• A61F2230/0013

  Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped · CPC title

• A61F2220/0075

  sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable · CPC title

• A61F2210/0014

  using shape memory or superelastic materials, e.g. nitinol · CPC title