RADIO-OPAQUE ENDOPROSTHESIS

• US 20090192587A1
• Filed: 10/02/2006
• Published: 07/30/2009
• Est. Priority Date: 10/03/2005
• Status: Active Grant

• Current Assignee: Intressa Vascular
• Original Assignee: Cardiatis S.A.
• Inventors: Frid, Noureddine
• Granted Patent: US 8,353,951 B2
• Time in Patent Office: Days
• US Class Current: 623/1.15
• 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 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

An endoprosthesis furnished with an armature made of metal wires visible in X-ray medical imaging in which the armature is formed of at least two layers of wires, the wires forming the armature comprising a core made of a radio-opaque material, the interaction between the cores of the wires of the various layers improving the visibility of the said endoprosthesis in X-ray medical imaging.

Claims

1. Endoprosthesis furnished with an armature made of metal wires, the wires forming the armature comprising a core made of a radiopaque material, wherein;

the armature is formed of at least two layers of wires;

these at least two layers of wires, viewed laterally, take the form of a three-dimensional stack of superposed windows mutually offset in space and offer, in perspective, the appearance of a series of pyramidal frusta, the interaction between the cores of the wires of the various layers improving the visibility of the said endoprosthesis in X-ray medical imaging.

2. Endoprosthesis according to claim 1, wherein the armature is formed of at least three layers of wires.

3. Endoprosthesis according to claim 1, wherein the wires forming the at least two layers are mutually intertwined, so that each wire forms part of each of the layers.

4. Endoprosthesis according to claim 2, wherein the wires forming the at least three layers are mutually intertwined so that each wire forms part of each of the layers.

5. Endoprosthesis according to claim 1, wherein the diameter of the core of the wires does not exceed 25 μ

m.

6. Endoprosthesis according to claim 5, wherein the diameter of the core does not exceed 13 μ

m.

7. Endoprosthesis according to claim 6, wherein the diameter of the core does not exceed 13 μ

m.

8. Endoprosthesis according to claim 3, wherein the diameter of the core of the wires does not exceed 25 μ

m.

9. Endoprosthesis according to claim 8, wherein the diameter of the core does not exceed 21 μ

m.

10. Endoprosthesis according to claim 9, wherein the diameter of the core does not exceed 13 μ

m.

11. Endoprosthesis according to claim 1, wherein the radio-opaque material of the core is selected from the group consisting of gold, platinum, and tantalum.

12. Endoprosthesis according to claim 3, wherein the radio-opaque material of the core is selected from the group consisting of gold, platinum, and tantalum.

13. Endoprosthesis according to claim 5, wherein the radio-opaque material of the core is selected from the group consisting of gold, platinum, and tantalum.

14. Endoprosthesis according to claim 1, wherein the metal surrounding the radio-opaque core is selected from the group consisting of stainless steel, Elgiloy, nickel alloys, and titanium alloys.

15. Endoprosthesis according to claim 14, wherein the metal surrounding the core is a shape memory material.

16. Endoprosthesis according to claim 1, wherein the wires are produced by co-extrusion.

17. Endoprosthesis according to claim 3, wherein the wires are produced by co-extrusion.

18. Endoprosthesis according to claim 1, wherein the armature is devoid of coating.