Cardiac valve prosthesis system

• US 8,747,461 B2
• Filed: 12/28/2010
• Issued: 06/10/2014
• Est. Priority Date: 07/17/2008
• Status: Active Grant

• Current Assignee: NVT AG (Blue Sail Medical Co., Ltd.)
• Original Assignee: NVT AG (Blue Sail Medical Co., Ltd.)
• Inventors: Centola, Marcos
• Primary Examiner(s): Isabella, David
• Assistant Examiner(s): Ganesan, Suba
• Application Number:
  US12/980,087
• Publication Number:
  US 20110125258A1
• Time in Patent Office: 1,260 Days
• Field of Search: 623/1.24, 623/1.26, 623 21- 219, 623 238- 241
• US Class Current: 623/2.19
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: Y10T 29/49405 Valve or choke making

Abstract

The present invention concerns a cardiac valve prosthesis system (10; 40) for implantation into the body of a mammal. The prosthesis system (19; 40) comprises a valve (16) mounted on an stent element (18) to form a stented valve element (12), and an anchoring element (14) to be arranged within the aorta of the mammal to be treated with the prosthesis and spaced-apart form the stented valve element (12). Further, the anchoring element (14) comprises a cylindrical tube element composed of fabric (22) supported by a metal mesh, and the stented valve element (12) and the anchoring element (14) represent two constructional distinctive elements being associated by ligament-like connecting means (30; 50), such, that the connecting region (28) between the stented valve element (12) and the anchoring element (14) is generally free from foreign material.

Claims

1. A cardiac valve prosthesis system for implantation into the body of a mammal, comprising

a valve mounted on a stent element to form a stented valve element and

an anchoring element to be arranged within the aorta of the mammal and spaced-apart distally from the stented valve element, wherein the anchoring element comprises a cylindrical tube element composed of fabric supported by a metal mesh consisting of two or more metal rings, meandering circumferentially and being disposed successively in the anchoring element'"'"'s longitudinal direction, wherein the metal rings have a Z-shaped profile with pointed arches pointing alternately toward the proximal end and distal end of the anchoring element,

wherein the stented valve element and the anchoring element represent two constructional distinctive elements being associated only by ligament-like connecting means, such that the stented valve element and the anchoring element are spaced-apart and do not directly contact each other, and

wherein said fabric of the cylindrical tube element consists of a fabric material which is fixed to the rings thereby connecting them, wherein said rings are connected to each other only by said fabric material, and wherein said rings do not touch or cross each other, said fabric material forming a hollow cylindrical body, and

wherein the last ring of the anchoring element has only three pointed arches pointing toward the proximal end of the anchoring element, and

wherein the stented valve element is associated with the anchoring element via three poles of the valve, the three poles of the valve, via the connecting means, being associated with said three pointed arches.

2. The cardiac valve prosthesis system according to claim 1, wherein the ligament-like connecting means comprise suturing or mechanical means, by which the stented valve element is connected with the anchoring element.

3. The cardiac valve prosthesis system according to claim 1, wherein the ligament-like connecting means comprise suturing means consisting of thread-like structures.

4. The cardiac valve prosthesis system according to claim 1, wherein said ligament-like connecting means comprise flexible bar-formed structures which, via their ends, are associated with said stented valve element and said anchoring element respectively.

5. The cardiac valve prosthesis system according to claim 1, wherein the number of pointed arches of the last ring of the proximal end of the anchoring element is smaller than the number of pointed arches of the rings that are disposed successively to the last ring toward the distal end of the anchoring element.

6. The cardiac valve prosthesis system according to claim 1, wherein the stent element of the stented valve element is a self-expanding stent element.

7. The cardiac valve prosthesis system according to claim 1, wherein the stent element of the stented valve element comprises a shape-memory material, including at least one of a shape-memory polymer or a shape-memory metal.

8. The cardiac valve prosthesis system according to claim 1, wherein the fabric of the anchoring element comprises a material selected from the group polymers.

9. The cardiac valve prosthesis system according to claim 1, wherein the metal mesh of the anchoring element consists of rings comprising a shape-memory material, including at least one of a shape-memory polymer or a shape-memory metal.

10. The cardiac valve prosthesis system according to claim 1, wherein the valve is a heart valve comprising a material selected from the group human, bovine, porcine, or equine pericardium tissue.

11. A process for producing a cardiac valve prosthesis of claim 1, the process comprising the following steps:

providing a valve mounted on a stent element to form a stented valve element,

providing an anchoring element to be arranged in the aorta of a patient comprising a cylindrical tube element composed of fabric supported by a metal mesh, said metal mesh consisting of two or more metal rings, meandering circumferentially and being disposed successively in the anchoring element'"'"'s longitudinal direction, wherein the metal rings have a Z-shaped profile with pointed arches pointing alternately toward the proximal end and distal end of the anchoring element, wherein the last ring of the proximal end has only three pointed arches pointing toward the proximal end of the anchoring element, and said fabric of the cylindrical tube element consisting of a fabric material which is fixed to the rings thereby connecting them, wherein said fabric of the cylindrical tube element consists of a fabric material which is fixed to the rings thereby connecting them, wherein said rings are connected to each other only by said fabric material, and wherein said rings do not touch or cross each other, said fabric material forming a hollow cylindrical body, and said fabric material forming a hollow cylindrical body, and

connecting the stented valve element and the anchoring element by ligament-like connecting means, such that the stented valve element and the anchoring element are spaced-apart and do not directly contact each other, and that the stented valve element is associated with the anchoring element via three poles of the valve.

12. The process of claim 11, wherein the ligament-like connecting means used for connecting the stented valve element and the anchoring element are suturing and/or mechanical means.

13. The cardiac valve prosthesis system according to claim 1, wherein the stent element of the stented valve element comprises nitinol.

14. The cardiac valve prosthesis system according to claim 1, wherein the fabric of the anchoring element comprises polyester.

15. The cardiac valve prosthesis system according to claim 1, wherein the metal mesh of the anchoring element consists of rings comprising nitinol.