Heart valve leaflet with scalloped free margin

• US 6,283,995 B1
• Filed: 04/15/1999
• Issued: 09/04/2001
• Est. Priority Date: 04/15/1999
• Status: Active Grant

• Current Assignee: Corcym SRL (LivaNova Plc)
• Original Assignee: Sulzer Carbomedics Inc. (Zimmer Biomet Holdings, Inc.)
• Inventors: Moe, Riyad E., Sarnowski, Edward J.
• Primary Examiner(s): SNOW, BRUCE EDWARD
• Application Number:
  US09/292,485
• Time in Patent Office: 873 Days
• Field of Search: 623/2.1, 623/2.12, 623/2.14, 623/2.15, 623/2.3, 623/2.19, 623/2.13
• US Class Current: 623/2.19
• 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

Abstract

A heart valve prosthesis includes a molded body and a plurality of leaflets. Each leaflet includes a free margin having opposite ends and a mid-point. The opposite ends are attached to a peripheral portion of the valve. Each free margin is adjacent each other free margin to form a natural-state non-uniform gap therebetween. The gap has a maximized width adjacent the mid-point of each leaflet. Each free margin is scalloped to form a peak at the opposite ends and a mid-point peak between the opposite ends. Each peak is substantially the same height above the base.

Claims

1. A heart valve prosthesis comprising:

a peripheral valve body;

at least three polymeric leaflets, each leaflet comprising a free margin having opposite ends attached to said peripheral valve body and a mid-point, each said free margin being adjacent another free margin to form a plurality of adjacent free margin pairs, and each free margin being scalloped to form a peak at each of said opposite ends and a mid-point peak between said opposite ends; and

a plurality of natural state non-uniform gaps formed between each of said adjacent free margin pairs, said gaps having a first width adjacent said opposite ends and a second width adjacent said mid-point, said second width being greater than said first width.

2. The heart valve of claim 1 wherein the peripheral valve body comprises an annular surface.

3. The heart valve of claim 2 wherein the annular surface comprises a plurality of commissures formed therewith.

4. The heart valve as defined in claim 3 wherein the opposite ends terminate adjacent a respective one of the commissures.

5. The heart valve of claim 1 wherein the body includes a base having a sewing ring formed therewith.

6. The heart valve of claim 1 wherein the body includes a base, each peak extending to a substantially equal height above the base.

7. The heart valve of claim 1 wherein the leaflets are molded.

8. The heart valve of claim 1 further comprising a central opening the mid-point peak being adjacent the central opening.

9. The heart valve of claim 1 wherein each mid-point peak is of a height sufficient to contact each other mid-point peak in response to each free margin being urged toward each other free margin.

10. A heart valve prosthesis comprising:

a valve body comprising a base and a plurality of polymeric leaflets, each leaflet comprising a free margin having opposite ends attached to said valve body and a mid-point;

each free margin being adjacent another free margin to form a natural-state nonuniform gap therebetween, the gap having a maximized width adjacent the mid-point of each leaflet; and

each free margin being scalloped to form a peak at each of the opposite ends and a mid-point peak between the opposite ends, each peak being of substantially equal height above the base.

11. The heart valve of claim 10 wherein the valve body further comprises a peripheral portion comprising an annular surface.

12. The heart valve as defined in claim 11 wherein the annular peripheral surface includes a plurality of commissures formed therewith.

13. The heart valve as defined in claim 12 wherein the opposite ends terminate adjacent a respective one of the commissures.

14. The heart valve of claim 10 wherein the body includes a base having a sewing ring formed therewith.

15. The heart valve of claim 10 wherein the body molded.

16. The heart valve of claim 10 further comprising a central opening, the mid-point peak being adjacent the central opening.

17. The prosthetic heart valve as defined in claim 10 wherein each mid-point peak is of a height sufficient to converge with each other mid-point peak to a substantially closed position in response to each free margin being urged toward each other free margin.

18. A flexible leaflet heart valve comprising:

a body and at least three leaflets, each leaflet including a free margin having opposite ends and a mid-point, the opposite ends being attached to a peripheral portion of the valve;

each free margin being adjacent each other free margin to from a natural-state non-uniform gap therebetween, the gap including at least three legs having a substantially uniform first width and a central opening having a second width greater than the first width interconnecting the three legs; and

each free margin being scalloped to form a peak at the opposite ends and a mid-point peak adjacent the central opening.

19. The heart valve of claim 18 wherein the peripheral portion of the valve comprises an annular surface comprising a plurality of commissures formed therewith.

20. The heart valve as defined in claim 19 wherein the opposite ends terminate adjacent a respective one of the commissures.

21. The heart valve of claim 18 wherein the body is molded and comprises a base having a sewing ring formed therewith.

22. The heart valve of claim 18 wherein the body comprises a base, each peak extending to a substantially equal height above the base.

23. The heart valve as defined in claim 18 wherein each leaflet free margin is molded.

24. The heart valve as defined in claim 18 wherein each leaflet free margin is molded separate from each other leaflet margin.