# US 9,872,765 B2 · Mitral valve assembly

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- Number: US 9,872,765 B2
- Document ID: US9872765B2
- Status: Granted
- Kind: B2
- Application number: 14/880,836
- Filed: 2015-10-12
- Published: 2017-04-13
- Granted: 2018-01-23
- Earliest claimed: 2015-10-12
- Assignees: Venus Medtech (Hangzhou), Inc.
- Applicants: Horizon Scientific Corp.
- Inventors: Min Frank Zeng; Pham Lo
- Web page: https://patentgrep.com/patent/US9872765B2

## CPC

- A61F 2/2418: {Scaffolds therefor, e.g. support stents}
- A61F 2/2412: {with soft flexible valve members, e.g. tissue valves shaped like natural valves}
- A61F 2/2433: {using balloon catheter}
- A61F 2/2436: {Deployment by retracting a sheath}
- A61F 2/915: with bands having a meander structure, adjacent bands being connected to each other
- A61F 2210/0014: using shape memory or superelastic materials, e.g. nitinol
- A61F 2210/0071: thermoplastic
- A61F 2220/0075: sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
- A61F 2230/0006: circular
- A61F 2230/0021: square
- A61F 2230/0052: T-shaped
- A61F 2230/0071: spherical
- A61F 2250/0039: differing in diameter
- A61F 2250/0067: Means for introducing or releasing pharmaceutical products into the body
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## 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

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 2)

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

### Claim 4 (depends on 1)

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

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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