Bioprosthetic heart valve with absorbable stent

• US 5,489,297 A
• Filed: 11/02/1994
• Issued: 02/06/1996
• Est. Priority Date: 01/27/1992
• Status: Expired due to Fees

• Current Assignee: Carlos M.G. Duran
• Original Assignee: Carlos M.G. Duran
• Inventors: Duran, Carlos M. G.
• Primary Examiner(s): SHAY, RANDY CITRIN
• Application Number:
  US08/333,553
• Time in Patent Office: 461 Days
• Field of Search: 623/2, 623/900
• US Class Current: 623/2.13
• CPC Class Codes: A61F 2/06 Blood vessels
• 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 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: Y10S 623/90 Stent for heart valve

Abstract

The invention relates to a bioprosthetic heart valve having leaflets affixed to a substantially absorpable stent. The leaflets can be derived from a biological membrane which is affixed to the absorbable stent. The leaflets can also be derived from a sigmoid valve of human or animal origin, the sigmoid valve being placed inside the absorbable stent and affixed thereto. Methods of treatment using the bioprosthetic heart valve and methods of making the valve are also provided.

Claims

1. A bioprosthetic heart valve comprising:

a stent defining a blood flow path, said stent being formed at least partially of substantially bioabsorbable material; and

a plurality of leaflets, each of said leaflets having an outer edge and an inner edge, each of said inner edges being affixed to said stent, said outer edges adapted to come into contact with each other to close the blood flow path defined by said stent.

2. The bioprosthetic heart valve of claim 1, wherein the leaflets comprise a biological material.

3. The bioprosthetic heart valve of claim 2, wherein the biological material comprises a substantial portion of a human cadaveric heart valve.

4. The bioprosthetic heart valve of claim 2, wherein the biological material comprises a substantial portion of a xenogeneic animal heart valve.

5. The bioprosthetic heart valve of claim 2, wherein the biological material is selected from the group consisting of pericardium, pleura, peritoneum, fascia lata and a combination of any of the foregoing.

6. The bioprosthetic heart valve of claim 2, wherein the biological material is selected from the group consisting of xenogeneic tissue, homologous tissue, autologous tissue and a combination of any of the foregoing.

7. The bioprosthetic heart valve of claim 1, wherein the stent is configured from a closed filament having an inflow end and outflow end, wherein the filament has a plurality of convexities oriented toward the inflow end and a plurality of peaks oriented toward the outflow end.