Replacement prosthetic heart valves and methods of implantation

• US 20080243246A1
• Filed: 02/15/2008
• Published: 10/02/2008
• Est. Priority Date: 02/16/2007
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Ryan, Timothy R., Bonhoeffer, Philipp
• Granted Patent: US 9,504,568 B2
• Time in Patent Office: Days
• US Class Current: 623/2.18
• 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 2/2433 using balloon catheter
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2220/005 using adhesives
• 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 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys

Abstract

A replacement prosthetic heart valve for engagement with a structure of a previously implanted prosthetic heart valve. The replacement heart valve includes a stent structure including a generally tubular body portion with an interior area and a series of wire portions arranged in a mesh-like configuration, and at least one stent post engaging structure extending radially outwardly from the body portion for engaging with an outer surface of a stent post of the previously implanted prosthetic heart valve. The stent structure further includes at least two leaflets attached within the interior area of the tubular body portion of the stent structure.

Claims

1. A replacement prosthetic heart valve for engagement with a structure of a previously implanted prosthetic heart valve, the replacement heart valve comprising:

a stent structure comprising;

a generally tubular body portion comprising an interior area and a series of wire portions arranged in a mesh-like configuration; and

at least one stent post engaging structure extending radially outwardly from the body portion for engaging with an outer surface of a stent post of the previously implanted prosthetic heart valve; and

at least two leaflets attached within the interior area of the tubular body portion of the stent structure.

2. The replacement heart valve of claim 1, wherein at least one of the generally tubular body portion and the at least one stent post engaging structure is self-expandable from a collapsed portion to an expanded position in response to removal of an external compressive force.

3. The replacement heart valve of claim 1, wherein the stent structure comprises at least one portion that is self-expandable with the removal of an external compressive force and at least one portion that is expandable with the application of an outward radial force.

4. The replacement heart valve of claim 3, wherein the tubular body portion comprises a material that is expandable with the application of an outward radial force.

5. The replacement heart valve of claim 4, wherein the at least one stent post engaging structure comprises a self-expanding material.

6. The replacement heart valve of claim 1, wherein the stent structure further comprises at least one lower flange member extending outwardly from the tubular body portion and biased toward an outflow end of the replacement heart valve.

7. The replacement heart valve of claim 1, wherein the stent structure further comprises at least one upper flange member extending outwardly from the tubular body portion and biased toward an inflow end of the replacement heart valve.

8. The replacement heart valve of claim 1, wherein at least one stent post engaging structure comprises a visually detectable marker.

9. The replacement heart valve of claim 1, further comprising a sealing gasket surrounding at least a portion of a perimeter of the generally tubular body portion.

10. A method of implanting a replacement prosthetic heart valve within a previously implanted prosthetic heart valve, the method comprising:

positioning a replacement prosthetic heart valve in an internal area defined by the structure of the previously implanted prosthetic heart valve, wherein the replacement heart valve comprises;

a stent structure comprising;

a generally tubular body portion comprising an interior area and a series of wire portions arranged in a mesh-like configuration; and

at least one stent post engaging structure extending radially outwardly from the body portion for engaging with an outer surface of a stent post of the previously implanted prosthetic heart valve; and

at least two leaflets attached within the interior area of the tubular body portion;

wherein a first portion of the stent structure is self-expandable with the removal of an external compressive force and a second portion of the stent structure is expandable with the application of an outward radial force;

removing the external compressive force on the stent structure to allow the first portion of the stent structure to radially expand; and

applying an outward radial force to the stent structure to expand the second portion of the stent.

11. The method of claim 10, wherein the first portion of the stent structure comprises the tubular body portion.

12. The method of claim 10, wherein the second portion of the stent structure comprises the at least one stent post engaging structure.