Three-dimensional braided structure stent

• US 20040215332A1
• Filed: 11/21/2003
• Published: 10/28/2004
• Est. Priority Date: 12/12/2000
• Status: Active Grant

• Current Assignee: Cardiatis S.A.
• Original Assignee: Cardiatis S.A.
• Inventors: Frid, Noureddine
• Granted Patent: US 7,588,597 B2
• Time in Patent Office: Days
• US Class Current: 623/1.22
• CPC Class Codes: A61F 2/852 Two or more distinct overlapping stents
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2250/0063 Nested prosthetic parts

Abstract

A modular luminal endoprosthesis formed principally of a framework, generally called a stent, and more particularly an endoprosthesis for blood vessels.

The framework (6) of this stent comprises a plurality of interconnected layers (8, 10, 12), each of these layers (8, 10, 12) being formed by two plies of metal wires (14), which are respectively dextrogyratory and laevogyratory, and which are interlaced and form a lattice, a plurality of wires (14) of a given layer (8, 10, 12) being integrated in the lattice of at least one of the adjacent layers (8, 10, 12).

Claims

1. Luminal endoprosthesis equipped with a braided framework, wherein the framework comprises a plurality of layers of biocompatible metal wires which are interlaced, each of these layers being formed by two plies of wires, which are respectively dextrogyratory and laevogyratory, and which are interlaced and form a lattice, a plurality of wires of a given layer being integrated in the lattice of at least one of the adjacent layers.

2. Luminal endoprosthesis according to claim 1, wherein the material of the wires is chosen from among the following materials [stainless steel, Phynox®

, Elgiloy®

, titanium and its alloys, Nitinol].

3. Luminal endoprosthesis according to claim 1, wherein the framework comprises metal wires of different thicknesses.

4. Luminal endoprosthesis according to claim 2, wherein the framework comprises metal wires of different thicknesses.

5. Luminal endoprosthesis according to claim 3, wherein the framework comprises layers formed by wires of different thickness.

6. Luminal endoprosthesis according to claim 4, wherein the framework comprises layers formed by wires of different thickness.

7. Luminal endoprosthesis according to claim 3, wherein the framework comprises metal wires of different types.

8. Luminal endoprosthesis according to claim 4, wherein the framework comprises metal wires of different types.

9. Luminal endoprosthesis according to claim 5, wherein the thickness of the wires lies at least within a range of between 25 and 60 micrometres.

10. Luminal endoprosthesis according to claim 6, wherein the thickness of the wires lies at least within a range of between 25 and 60 micrometres.

11. Luminal endoprosthesis according to claim 1, wherein the framework is at least partially without a cover layer.

12. Luminal endoprosthesis according to claim 2, wherein the framework is at least partially without a cover layer.

13. Luminal endoprosthesis according to claim 11, wherein the framework comprises a plurality of layers formed principally of thin wires which ensure the filtration of particles likely to cause thrombosis.

14. Luminal endoprosthesis according to claim 12, wherein the framework comprises a plurality of layers formed principally of thin wires which ensure the filtration of particles likely to cause thrombosis.

15. Luminal endoprosthesis according to claim 1, wherein the framework comprises a plurality of layers providing the side wall of this stent with a porosity transforming a haemodynamic convection flow through this wall into a diffusion flow.

16. Luminal endoprosthesis according to claim 2, wherein the framework comprises a plurality of layers providing the side wall of this stent with a porosity transforming a haemodynamic convection flow through this wall into a diffusion flow.