COMPOSITE WIRE FOR IMPLANTABLE CARDIAC LEAD CONDUCTOR CABLE AND COILS

• US 20070154729A1
• Filed: 11/09/2006
• Published: 07/05/2007
• Est. Priority Date: 11/10/2005
• Status: Active Grant

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: Chastain, Stuart, Hoeker, Russell
• Granted Patent: US 7,612,291 B2
• Time in Patent Office: Days
• US Class Current: 428/607
• CPC Class Codes: A61L 31/088 Other specific inorganic materials not covered by A61L31/084 or A61L31/086
• CPC Class Codes: A61L 31/124 of other specific inorganic materials not covered by A61L31/122 or A61L31/123
• CPC Class Codes: A61N 1/05 for implantation or insertion into the body, e.g. heart electrode A61N1/06 takes precedence
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: Y10T 428/12438 Composite

Abstract

A composite wire can include a core including a material chosen from the group consisting of Ag and Ir and combinations thereof, a shell around the core including a material chosen from the group consisting of Ta, MP35N, and Nb and combinations thereof, and an outer layer over the shell including a material chosen from the group consisting of Pt and Pt—Ir and combinations thereof.

Claims

1. A composite wire comprising:

a core including a material chosen from the group consisting of Ag and Ir and combinations thereof;

a shell around the core including a material chosen from the group consisting of Ta, MP35N, and Nb and combinations thereof; and

an outer layer over the shell including a material chosen from the group consisting of Pt and Pt—

Ir and combinations thereof.

2. The composite wire of claim 1, wherein core includes an embedded strand construction.

3. The composite wire of claim 1, wherein the wire includes a diameter of about 0.0008 inches to about 0.010 inches.

4. The composite wire of claim 1, wherein a cross-sectional area of the core is about 5% to about 50% of a cross-sectional area of the composite wire.

5. The composite wire of claim 1, wherein a cross-sectional area of the outer layer is about 2% to about 20% of a cross-sectional area of the composite wire.

6. The composite wire of claim 1, wherein the composite wire is cold-drawn.

7. The composite wire of claim 1, wherein the composite wire is heat treated.

8. A composite wire comprising:

a core including a material chosen from the group consisting of Ag and Au and combinations thereof;

a shell around the core including a material chosen from the group consisting of Ta and Nb and combinations thereof; and

an outer layer over the shell including a material chosen from the group consisting of Pt, Pt—

Ir, MP35N, and stainless steel and combinations thereof.

9. The composite wire of claim 8, wherein core includes an embedded strand construction.

10. The composite wire of claim 8, wherein the wire includes a diameter of about 0.0008 inches to about 0.010 inches.

11. A composite wire comprising:

a core including a material chosen from the group consisting of Ag, Au, Rh, Mo, alloy of Ta and Mo, Cu, Ir, Ta, and Ti and combinations thereof;

a shell around the core including a material chosen from the group consisting of stainless steel, Ta, MP35N, Pt, and Pt—

Ir and combinations thereof; and

an outer layer over the shell including a material chosen from the group consisting of Ag, Pt, Pt—

Ir (5-30% Ir), Ta, Rh, Ti, stainless steel, MP35N, Pt—

Rh, and Nb and combinations thereof.

12. The composite wire of claim 11, wherein core includes an embedded strand construction.

13. A composite wire comprising:

a core including a material chosen from the group consisting of Ag, Au, Rh, Mo, alloy of Ta and Mo, Cu, Ir, Ta, and Ti and combinations thereof;

a shell around the core including a material chosen from the group consisting of Ta, MP35N, Pt, and Pt—

Ir and combinations thereof; and

an outer layer over the shell including a material chosen from the group consisting of Ag, Pt, Pt—

Ir (5-30% Ir), Ta, Rh, Ti, stainless steel, MP35N, Pt—

Rh, and Nb and combinations thereof.

14. The composite wire of claim 13, wherein the core includes an embedded strand construction.

15. The composite wire of claim 13, wherein a cross-sectional area of the core is about 5% to about 50% of a cross-sectional area of the composite wire.

16. The composite wire of claim 13, wherein the core consists of Mo, the shell consists of Ta, and the outer layer consists of a material chosen from the group consisting of Pt, Pt—

Ir, and MP35N and combinations thereof.

17. A composite wire comprising:

a core including a material chosen from the group consisting of Ag, Au, Rh, Mo, alloy of Ta and Mo, Cu, Ir, Ta, and Ti and combinations thereof;

a shell around the core including a material chosen from the group consisting of stainless steel, Ta, MP35N, Pt, and Pt—

Ir and combinations thereof; and

an outer layer over the shell including a material chosen from the group consisting of Ag, Ta, Rh, Ti, stainless steel, MP35N, Pt—

Rh, and Nb and combinations thereof.

18. The composite wire of claim 17, wherein a cross-sectional area of the core is about 5% to about 50% of a cross-sectional area of the composite wire.

19. A composite wire comprising:

an embedded strand wire including an Ag embedding matrix and a plurality of filaments including Ta or stainless steel within the matrix.

20. The composite wire of claim 19, wherein the number of peripheral filaments is six or more.

21. The composite wire of claim 19, wherein a volume fraction of the matrix is 15% to 40% of a total volume of the composite wire.

22. The composite wire of claim 19, further including a shell around the embedding matrix including a material chosen from the group consisting of Ta, MP35N, and Pt—

Ir and combinations thereof.

23. A composite wire comprising:

an embedding matrix including a material chosen from the group consisting of Ag, Rh and Au and combinations thereof; and

a plurality of filaments embedded within the embedding matrix including a material chosen from the group consisting of F138ASTM stainless steel, F1314 ASTM stainless steel, cobalt alloy, Ta, and Mo and combinations thereof.

24. The composite wire of claim 23, wherein each of the plurality of filaments includes a composite structure of two or more materials.

25. A composite wire comprising:

a core including a material chosen from the group consisting of Ta, Mo, Ag, Rh, Au, Ti, Cu, or Ir and combinations thereof; and

a shell around the core including a material chosen from the group consisting of stainless steel, MP35N, Ta, Nb, Pt, and Pt—

Ir, and combinations thereof.

26. The composite wire of claim 25, wherein the core consists of Mo, and the shell consists of MP35N.

27. The composite wire of claim 25 wherein the core consists of Ag or Au, and the shell consists of Ta or Nb.

28. The composite wire of claim 25, wherein the core consists of Mo or Ir and the shell consists of Ta or Nb.

29. A composite wire comprising:

a core including a material chosen from the group consisting of Ta, alloy of Ta and Mo, and Ir and combinations thereof, and

a shell around the core including a material chosen from the group consisting of Pt and Pt—

Ir, and combinations thereof.

30. The composite wire of claim 29, wherein the wire includes an outer diameter of about 0.0008 inches to about 0.010 inches.