Mitral Valve Assembly

• US 20170100240A1
• Filed: 10/12/2015
• Published: 04/13/2017
• Est. Priority Date: 10/12/2015
• Status: Active Grant

• Current Assignee: Venus Medtech (Hangzhou), Inc.
• Original Assignee: Horizon Scientific Corp.
• Inventors: Zeng, Min Frank, Lo, Pham
• Granted Patent: US 9,872,765 B2
• Time in Patent Office: 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 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, with the anchoring section having a configuration similar to the configuration of a left atrium; and

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

2. The assembly of claim 1, wherein the anchoring section has an inflow end that is configured with an annular zig-zag arrangement that defines peaks and valleys.

3. The assembly of claim 1, wherein the anchoring section has an outflow end that is configured with an annular zig-zag arrangement that defines peaks and valleys.

4. The assembly of claim 2, wherein the anchoring section includes a plurality of ears that are provided at its inflow end.

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

6. The assembly of claim 1, wherein the plurality of leaflets comprises two, three or four leaflets.

7. A method for securing a heart valve assembly in the left atrium of a human heart, comprising the steps of:

providing a heart valve assembly comprising a frame comprising 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, and a leaflet assembly having a plurality of leaflets that are stitched to the legs, with the anchoring section having a configuration similar to the configuration of a left atrium;

delivering the heart valve assembly to the location of a native mitral annulus;

deploying the anchoring section inside the left atrium such that the anchoring section is completely retained in the left atrium, and the legs and the leaflets extend through the native mitral annulus.