Low profile expandable heart valve

Patent metadata

Field	Value
Publication number	US-12514701-B2
Application number	US-202318337656-A
Country	US
Kind code	B2
Filing date	Jun 20, 2023
Priority date	Jul 23, 2020
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

A prosthetic heart valve includes a radially collapsible and expandable stent, a cuff and leaflets sutured thereto. The heart valve extends axially between an inflow end and an outflow end and the stent includes a layout of struts and nodes having a hybrid combination of vertical struts and oblique struts in the form of diamond-shaped and half diamond-shaped cells. The layout of the structure is configured to preserve a low cell density of material used in the stent to reduce the stent profile while in a collapsed state and to improve the deployment accuracy of the stent into the native valve annulus.

First claim

The invention claimed is:

1 . A prosthetic heart valve, comprising:
a collapsible and expandable stent extending in an axial direction from a first inflow end to a second outflow end, the collapsible and expandable stent having a plurality of vertical struts that are parallel to the axial direction in an expanded condition of the stent and that span the length of the collapsible and expandable stent from the first inflow end to the second outflow end, and a plurality of oblique struts that are oblique to the axial direction in the expanded condition of the stent, the plurality of oblique struts being coupled to the plurality of vertical struts; a cuff coupled to the stent; and a plurality of prosthetic leaflets disposed within the stent, the plurality of prosthetic leaflets configured to allow blood to flow in an antegrade direction from the first inflow end toward the second outflow end of the stent, and to substantially block blood from flowing in a retrograde direction from the second outflow end of the stent toward the first inflow end of the stent; wherein each section of the plurality of oblique struts includes a first pair of oblique struts forming a first half-diamond shaped cell at the first inflow end of the stent, and a second pair of oblique struts forming a second half-diamond shaped cell at the first inflow end of the stent; the first pair of oblique struts includes a first oblique strut directly coupled to the first end of a first one of the vertical struts, and a second oblique strut, and the second pair of oblique struts includes a third oblique strut coupled to the second oblique strut at the first inflow end of the stent, and a fourth oblique strut directly coupled to a first end of a second one of the vertical struts.

2 . The prosthetic heart valve of claim 1 , wherein the plurality of vertical struts includes three vertical struts, and the plurality of prosthetic leaflets includes three prosthetic leaflets.

3 . The prosthetic heart valve of claim 2 , wherein the stent includes three sections of the plurality of oblique struts, each section being positioned circumferentially between an adjacent pair of vertical struts, and each section being symmetric and having an arcuate shape extending about 120 degrees around a circumference of the stent, and wherein each section of the plurality of oblique struts includes a diamond-shaped cell disposed adjacent the first half-diamond shaped cell and the second half-diamond shaped cell.

4 . The prosthetic heart valve of claim 3 , wherein the second oblique strut and the third oblique strut define segments of the diamond-shaped cell.

5 . The prosthetic heart valve of claim 4 , further comprising a fifth oblique strut and a sixth oblique strut.

6 . The prosthetic heart valve of claim 5 , wherein the fifth oblique strut and the sixth oblique strut are joined together.

7 . The prosthetic heart valve of claim 6 , wherein each section of the plurality of oblique struts includes a seventh oblique strut coupled to the second end of the first one of the vertical struts, and an eighth oblique strut coupled to the second end of the second one of the vertical struts, the seventh and eighth oblique struts each extending from the respective ones of the vertical struts toward the second outflow end of the stent where the seventh and eighth oblique struts connect to each other.

8 . The prosthetic heart valve of claim 7 , wherein each section of the plurality of oblique struts includes a ninth oblique strut coupled to the seventh oblique strut, and a tenth oblique strut coupled to the eighth oblique strut.

9 . The prosthetic heart valve of claim 8 , wherein the ninth oblique strut, the tenth oblique strut, and portions of the fifth and sixth oblique struts together form a kite-shaped cell, the kite-shaped cell being axially aligned with the diamond-shaped cell in the axial direction.

10 . The prosthetic heart valve of claim 1 , wherein each of the plurality of leaflets includes a free edge adapted to move radially toward and away from the stent, and an attached edge coupled to the stent.

11 . The prosthetic heart valve of claim 1 , wherein the cuff includes an inflow end substantially aligned with the first inflow end of the stent, and the cuff includes an outflow end that is positioned between the first inflow end of the stent and the second outflow end of the stent.

12 . The prosthetic heart valve of claim 1 , wherein each of the plurality of vertical struts is longer than either of the first oblique strut and the second oblique strut.

13 . The prosthetic heart valve of claim 1 , wherein each of the plurality of vertical struts is longer than the first oblique strut.

14 . The prosthetic heart valve of claim 1 , wherein each of the plurality of vertical struts is longer than the second oblique strut.

Assignees

• St Jude Medical Cardiology Div Inc

Inventors

• Moore Brandon

Classifications

• A61F2230/0054

  V-shaped · CPC title

• A61F2230/0017

  Angular shapes · CPC title

• A61F2220/0075

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

• A61F2/2433

  using balloon catheter · CPC title

• A61F2/2418 Primary

  Scaffolds therefor, e.g. support stents · CPC title