Methods for treating a deficient native mitral valve

Patent metadata

Field	Value
Publication number	US-12285334-B2
Application number	US-202318350555-A
Country	US
Kind code	B2
Filing date	Jul 11, 2023
Priority date	Jun 20, 2008
Publication date	Apr 29, 2025
Grant date	Apr 29, 2025

Abstract

A method treating a deficient native mitral valve includes advancing the distal end portion of a delivery catheter into a heart, wherein the delivery catheter contains a support band stretched into a linear form, wherein the support band comprises a shape-memory material, and then ejecting the support band from the distal end portion of the delivery catheter such that the support band transitions from the linear form to a curved shape extending around native leaflets of the native mitral valve.

First claim

What is claimed is:

1. A method for treating a deficient native mitral valve, the method comprising:
advancing the distal end portion of a delivery catheter into a heart through a blood vessel of a patient until the distant end portion reaches a selected implantation site, wherein the delivery catheter contains a loop delivery catheter containing a support band stretched into a linear form, wherein the support band comprises a shape-memory material;
steering the distal end portion of the loop delivery catheter such that it curves partially around the native leaflets of the native mitral valve; and
ejecting the support band from the distal end portion of the loop delivery catheter by pushing the support band using a pusher shaft such that the support band transitions from the linear form to a curved shape extending around native leaflets of the native mitral valve such that the support band is disposed in a plane substantially parallel to a plane of an annulus of the native mitral valve and perpendicular to a direction of the flow of blood through the native mitral valve;
positioning an expandable prosthetic heart valve within an interior of the native mitral valve while the prosthetic heart valve is in a compressed shape; and
expanding the prosthetic heart valve, thereby causing an exterior surface of the prosthetic heart valve to urge the native leaflets of the native mitral valve against an interior surface of the support band and to frictionally secure the prosthetic heart valve to the native leaflets of the native mitral valve.

2. The method of claim 1 , wherein the support band is made of Nitinol.

3. The method of claim 1 , wherein the support band includes one or more barbs.

4. The method of claim 1 , further comprising clamping the support band onto the native leaflets.

5. The method of claim 1 , wherein the support band and the prosthetic heart valve are delivered separately using separate catheters.

6. The method of claim 1 , wherein the support band forms a loop extending fully around at least one leaflet of the native leaflets when ejected from the delivery catheter.

7. A method for treating a deficient native mitral valve, the method comprising:
advancing the distal end portion of a delivery catheter transvascularly into a heart, wherein the delivery catheter contains a loop delivery catheter containing a support band in a non-coiled, stretched configuration, wherein the support band comprises a shape-memory material;
positioning a distal end portion of the loop delivery catheter fully around at least one native leaflet of the native mitral valve in the left ventricle;
pushing the support band from the distal end portion of the loop delivery catheter using a pusher shaft such that the support band transitions from the stretched configuration to a curved shape extending fully around at least one native leaflet of the native mitral valve in a circumferential direction around an axis extending along a direction of blood flow through the native mitral valve;
clamping the support band onto the native leaflets of the native mitral valve;
positioning an expandable prosthetic heart valve within an interior of the native mitral valve while the prosthetic heart valve is in a compressed shape; and
expanding the prosthetic heart valve, thereby causing an exterior surface of the prosthetic heart valve to urge the native leaflets of the native mitral valve against an interior surface of the support band and to frictionally secure the prosthetic heart valve to the native leaflets of the native mitral valve.

8. The method of claim 7 , wherein the support band is made of Nitinol.

9. The method of claim 7 , wherein the support band includes one or more barbs.

10. A method for treating a deficient native mitral valve, the method comprising:
advancing a catheter delivery sheath through a blood vessel of a patient into a heart;
advancing a distal end portion of a loop delivery catheter from a distal end of the catheter delivery sheath to position the distal end portion of the loop delivery catheter that has been advanced from the catheter delivery sheath fully around at least one native leaflet of the native mitral valve in the left ventricle;
advancing a support band through the loop delivery catheter and around native leaflets of the native mitral valve by pushing the support band using a pusher shaft such that the support band is disposed in a plane substantially parallel to a plane of an annulus of the native mitral valve and perpendicular to a direction of the flow of blood through the native mitral valve;
wherein the support band extends fully around at least one native leaflet of the native mitral valve in a circumferential direction around an axis extending along a direction of blood flow through the native mitral valve;
positioning an expandable prosthetic heart valve within an interior of the native mitral valve while the prosthetic heart valve is in a compressed shape; and
expanding the prosthetic heart valve, thereby causing an exterior surface of the prosthetic heart valve to urge the native leaflets of the native mitral valve against an interior surface of the support band and to frictionally secure the prosthetic heart valve to the native leaflets of the native mitral valve.

11. The method of claim 10 , further comprising clamping the support band to the native leaflets of the native mitral valve.

12. The method of claim 10 , wherein the support band is made of Nitinol.

13. The method of claim 10 , wherein the support band includes one or more barbs.

Assignees

• Edwards Lifesciences Corp

Inventors

• Rowe Stanton J
• Maisano Francesco
• Meiri Oded

Classifications

• A61F2310/00023

  Titanium or titanium-based alloys, e.g. Ti-Ni alloys · CPC title

• A61F2/2409

  Support rings therefor, e.g. for connecting valves to tissue (annuloplasty rings A61F2/2442) · CPC title

• A61F2/2433

  using balloon catheter · CPC title

• A61F2/2445

  Annuloplasty rings in direct contact with the valve annulus · CPC title

• A61M2025/0004

  having two or more concentrically arranged tubes for forming a concentric catheter system · CPC title