Bi-Leaflet Mitral Valve Design

• US 20160095701A1
• Filed: 09/30/2015
• Published: 04/07/2016
• Est. Priority Date: 10/07/2014
• Status: Abandoned Application

• Current Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories Incorporated)
• Inventors: Dale, Theodore P., Diedering, Jason, Para, Andrea N.
• Application Number:
  US14/870,806
• Publication Number:
  US 20160095701A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61F 2/2412 with soft flexible valve members, e.g. tissue valves shaped like natural valves check valves with flexible valve members in general F16K15/14
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/0034 D-shaped

Abstract

A prosthetic mitral valve includes a collapsible and expandable elliptical or “D”-shaped stent. The stent includes first and second commissure attachment features and a collapsible and expandable valve assembly disposed therein. The valve assembly includes two leaflets, each leaflet having a first edge operably coupled to the stent and a second free edge. Each leaflet may include first and second tabs connecting first and second ends of the first and second edges, respectively. Each leaflet includes a height measured from a midpoint of the first edge to a midpoint of the second edge and a width measured from a junction of the first edge with the first tab to a junction of the first edge with the second tab. The ratio of the height to the width may be between about 0.4 and about 0.65.

Claims

1. A prosthetic mitral valve, comprising:

a collapsible and expandable stent;

first and second commissure attachment features disposed on the stent; and

a collapsible and expandable valve assembly disposed within the stent, the valve assembly including two leaflets, each leaflet having a first edge operably coupled to the stent, a second free edge, a first tab connecting a first end of the first edge to a first end of the second free edge, and a second tab connecting a second end of the first edge to a second end of the second free edge, each leaflet having a height measured from a midpoint of the first edge to a midpoint of the second edge, and a width measured from a junction of the first edge with the first tab to a junction of the first edge with the second tab;

wherein a ratio of the height to the width is between about 0.4 and about 0.65.

2. The prosthetic mitral valve of claim 1, wherein the ratio of the height to the width is between about 0.4 and about 0.5.

3. The prosthetic mitral valve of claim 2, wherein the ratio of the height to the width is about 0.46.

4. The prosthetic mitral valve of claim 3, wherein the height is about 20 mm and the width is about 43.5 mm.

5. The prosthetic mitral valve of claim 1, wherein the stent in an expanded condition is substantially elliptical in transverse cross-section.

6. The prosthetic mitral valve of claim 5, wherein the cross-section of the stent in the expanded condition has a minor axis with a length and a major axis with a length, a ratio of the length of the minor axis to the length of the major axis being between about 0.7 and about 0.99.

7. The prosthetic mitral valve of claim 6, wherein the first and second commissure attachment features are positioned at diametrically opposed positions on the stent substantially along the major axis.

8. The prosthetic mitral valve of claim 1, wherein the stent in an expanded condition is substantially “

D”

-shaped.

9. A prosthetic mitral valve, comprising:

a collapsible and expandable stent, the stent in an expanded condition being substantially elliptical in transverse cross-section with a minor axis having a length and a major axis having a length, a ratio of the length of the minor axis to the length of the major axis being between about 0.7 and about 0.99;

first and second commissure attachment features disposed on the stent; and

a collapsible and expandable valve assembly disposed within the stent, the valve assembly including two leaflets, a first portion of each leaflet coupled to the first commissure attachment feature and a second portion of each leaflet coupled to the second commissure attachment feature.

10. The prosthetic mitral valve of claim 9, wherein each leaflet has a first edge operably coupled to the stent, a second free edge, a first tab connecting a first end of the first edge to a first end of the second free edge, and a second tab connecting a second end of the first edge to a second end of the second free edge, each leaflet having a height measured from a midpoint of the first edge to a midpoint of the second edge, and a width measured from a junction of the first edge with the first tab to a junction of the first edge with the second tab, a ratio of the height to the width being between about 0.4 and about 0.65.

11. The prosthetic mitral valve of claim 10, wherein the ratio of the height to the width is between about 0.4 and 0.5.

12. The prosthetic mitral valve of claim 11, wherein the ratio of the height to the width is about 0.46.

13. The prosthetic mitral valve of claim 12, wherein the height is about 20 mm and the width is about 43.5 mm.

14. The prosthetic valve of claim 9, wherein the first and second commissure attachment features are positioned at diametrically opposed positions on the stent substantially along the major axis.