TWO-STAGE COLLAPSIBLE/EXPANDABLE PROSTHETIC HEART VALVES AND ANCHORING SYSTEMS

• US 20130245753A1
• Filed: 05/03/2013
• Published: 09/19/2013
• Est. Priority Date: 09/28/2007
• Status: Active Grant

• Current Assignee: St. Jude Medical (Abbott Laboratories Incorporated)
• Original Assignee: St Jude Medical Incorporated (Abbott Laboratories Incorporated)
• Inventors: Alkhatib, Yousef F.
• Granted Patent: US 8,961,595 B2
• Time in Patent Office: Days
• US Class Current: 623/2.18
• CPC Class Codes: A61F 2/2403 with pivoting rigid closure members check valves with hinged closure members in general F16K15/03
• 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 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0076 ellipsoidal or ovoid
• CPC Class Codes: A61F 2250/006 modular
• CPC Class Codes: A61F 2250/0069 Sealing means

Abstract

Prosthetic heart valve apparatus is adapted for delivery into a patient in a circumferentially collapsed condition, followed by circumferential re-expansion at the implant site in the patient. The apparatus includes an annular anchoring structure that can be implanted in the patient first. The apparatus further includes an annular valve support structure, which supports a flexible leaflet structure of the valve. The support and leaflet structures are initially separate from the anchoring structure, but they can be implanted in the patient by interengagement of the support structure with the already-implanted anchoring structure.

Claims

1. (canceled)

2. A prosthetic valve, comprising:

a stent having an expanded configuration and a collapsed configuration, the stent in the expanded configuration having a longitudinal axis, an inlet end and an outlet end, a first portion of the stent adjacent the inlet end tapering outwardly at an oblique angle to the longitudinal axis, and a second portion of the stent between the first portion and the outlet end defining an outwardly convex curve; and

a valve assembly supported by the stent.

3. The prosthetic valve as claimed in claim 2, wherein the second portion of the stent defining the outwardly convex curve is positioned between a first axial distance from the inlet end and a second axial distance from the inlet end, the stent also including a plurality of commissure supports positioned between the first axial distance from the inlet end and the second axial distance from the inlet end.

4. The prosthetic valve as claimed in claim 2, wherein the valve assembly includes three leaflets.

5. The prosthetic valve as claimed in claim 4, wherein the leaflets are formed from biological tissue.

6. The prosthetic valve as claimed in claim 4, wherein the valve assembly further includes a fabric cuff positioned between the stent and the leaflets.

7. The prosthetic valve as claimed in claim 4, wherein the stent includes a first stent section separable from a second stent section, the second stent section being adapted for engagement with the first stent section in assembled relationship.

8. A prosthetic valve, comprising:

a stent having an expanded configuration and a collapsed configuration, the stent in the expanded configuration having a longitudinal axis, an inlet end and an outlet end, the stent having a first portion adjacent the inlet end, a second portion adjacent the outlet end, and a middle portion between the first and second portions, the intersection of the first portion with the middle portion defining a first radius from the longitudinal axis, and the intersection of the second portion with the middle portion defining a second radius from the longitudinal axis, points in the middle portion having a radius from the longitudinal axis that is greater than the first radius and the second radius; and

a valve assembly supported by the stent.

9. The prosthetic valve as claimed in claim 8, wherein the first portion tapers outwardly at an oblique angle to the longitudinal axis.

10. A prosthetic valve system, comprising:

a stent having an expanded configuration and a collapsed configuration, the stent in the expanded configuration having a longitudinal axis, an inlet end and an outlet end;

a valve structure separate from the stent and adapted for (1) delivery into a patient in the collapsed configuration separate from the stent and (2) expansion into engagement with the stent in the expanded configuration to form an assembly, the valve structure including a valve assembly.

11. The prosthetic valve system as claimed in claim 10, wherein a first portion of the stent adjacent the inlet end tapers outwardly at an oblique angle to the longitudinal axis, and a second portion of the stent between the first portion and the outlet end defines an outwardly convex curve.

12. The prosthetic valve system as claimed in claim 11, wherein the second portion of the stent defining the outwardly convex curve is positioned between a first axial distance from the inlet end and a second axial distance from the inlet end, the assembly including a plurality of commissure supports positioned between the first axial distance from the inlet end and the second axial distance from the inlet end.

13. The prosthetic valve system as claimed in claim 10, wherein the valve assembly includes three leaflets.

14. The prosthetic valve system as claimed in claim 13, wherein the three leaflets are formed from biological tissue.

15. The prosthetic valve system as claimed in claim 13, wherein the valve assembly further includes a fabric cuff positioned between the stent and the leaflets.