Leaflet abrasion mitigation

• US 9,610,157 B2
• Filed: 03/19/2015
• Issued: 04/04/2017
• Est. Priority Date: 03/21/2014
• Status: Active Grant

• Current Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories Incorporated)
• Inventors: Braido, Peter N., Smith, Kent J., McCarthy, Andrea L., Alkhatib, Yousef F.
• Primary Examiner(s): Isabella, David
• Assistant Examiner(s): BARIA, DINAH N
• Application Number:
  US14/662,475
• Publication Number:
  US 20150265401A1
• Time in Patent Office: 747 Days
• CPC Class Codes: A61F 2/2409 Support rings therefor, e.g. for connecting valves to tissue annuloplasty rings A61F2/2442
• CPC Class Codes: A61F 2/2412 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 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2230/0069 cylindrical

Abstract

A prosthetic heart valve includes a stent extending in a longitudinal direction and having a plurality of commissure features. A valve assembly is secured to the stent, the valve assembly including a cuff and a plurality of leaflets. Each of the leaflets has a pair of attachment regions and a free edge extending between the attachment regions. A deflection feature disposed in each attachment region is configured and arranged to prevent the free edges of the leaflets from contacting at least one of the stent or the cuff.

Claims

1. A prosthetic heart valve, comprising:

a stent extending in a longitudinal direction and having a plurality of struts forming cells and a plurality of commissure features, each commissure feature being attached to selected struts at proximal and distal ends thereof;

a plurality of leaflets, each of the leaflets having a pair of attachment regions, each being attached to a commissure feature, and a free edge extending between the attachment regions; and

a cuff annularly disposed on a surface of the stent, the cuff extending between a first end and a second end, and having a main body, a rectangular portion disposed over each of the commissure features of the stent, and a deflection feature adjacent each of the rectangular portions near the second end of the cuff, the deflection feature being folded on itself, and entirely disposed on a luminal surface of the stent, and the deflection feature being configured and arranged to prevent the free edge of the leaflet from contacting at least one of the stent, and a calcium nodule.

2. The prosthetic heart valve according to claim 1, wherein the deflection feature includes an L-shape flap.

3. The prosthetic heart valve according to claim 1, wherein the deflection feature includes parallelogram-shaped flap.

4. The prosthetic heart valve according to claim 1, wherein the deflection feature includes a triangular flap.

5. The prosthetic heart valve according to claim 1, wherein the deflection feature is rolled on itself to form a cushion.