Mitral valve assembly

• US 9,872,765 B2
• Filed: 10/12/2015
• Issued: 01/23/2018
• Est. Priority Date: 10/12/2015
• Status: Active Grant

• Current Assignee: Venus Medtech (Hangzhou), Inc.
• Original Assignee: Venus Medtech (Hangzhou), Inc.
• Inventors: Zeng, Min Frank, Lo, Pham
• Primary Examiner(s): Sharma, Yashita
• Assistant Examiner(s): PRESTON, REBECCA STRASZHEIM
• Application Number:
  US14/880,836
• Publication Number:
  US 20170100240A1
• Time in Patent Office: 834 Days
• 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 2/2433 using balloon catheter
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2210/0071 thermoplastic
• 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 2230/0006 circular
• CPC Class Codes: A61F 2230/0021 square
• CPC Class Codes: A61F 2230/0052 T-shaped
• CPC Class Codes: A61F 2230/0071 spherical
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61F 2250/0067 Means for introducing or releasing pharmaceutical products into the body

Abstract

A heart valve assembly has a frame having an anchoring section defined by a plurality of rows of cells, with each cell defined by a plurality of struts that encircle each cell, and a pair of legs extending from the anchoring section. The assembly also includes a leaflet assembly that has a plurality of leaflets that are stitched to the legs. The heart valve assembly is delivered to the location of a native mitral annulus, and the anchoring section is deployed inside the left atrium such that the anchoring section is completely retained in the left atrium, and the legs and leaflets extend through the native mitral annulus.

Claims

1. A heart valve assembly, comprising:

a frame comprising;

a ball-shaped anchoring section defined by a plurality of rows of cells that includes a first row of cells and a second row of cells, with each cell defined by a plurality of struts that encircle each cell, with each row of cells having an annular zig-zag arrangement of struts that defines peaks and valleys, and wherein the zig-zags of the cells in the first row define a first apex which defines a first opening at an inflow end, and the zig-zags of the cells in the second row define a second apex which defines a second opening at an outflow end, with a longitudinal axis extending through the first and second openings;

exactly two legs extending from two opposite cells of the second row of cells of the anchoring section, with each of the two legs beginning at a first bend that extends from one of the two opposite cells, and then transitioning along a first straight section that extends towards the longitudinal axis to a second bend, and then extending vertically along a second straight section to a tip; and

a leaflet assembly having a plurality of leaflets that are stitched to the two legs.

2. The assembly of claim 1, wherein each tip comprises an ear.

3. The assembly of claim 2, wherein each ear is ring-shaped, T-shaped, or square shaped.

4. The assembly of claim 1, wherein the anchoring section and the legs are all provided in a single piece.

5. The assembly of claim 1, wherein each cell is somewhat diamond-shaped.

6. The assembly of claim 1, wherein the plurality of leaflets consists of exactly two leaflets.

7. The assembly of claim 1, wherein the plurality of rows of cells consists of exactly two rows of cells.