Medical electrical lead conductor formed from modified MP35N alloy

• US 7,138,582 B2
• Filed: 06/24/2003
• Issued: 11/21/2006
• Est. Priority Date: 06/24/2003
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Cobian, Kenenth E., Lessar, Joseph F., Mayer, David W., McIntyre, Peter B.
• Primary Examiner(s): Mayo, III, William H.
• Application Number:
  US10/601,472
• Publication Number:
  US 20040267107A1
• Time in Patent Office: 1,246 Days
• Field of Search: 174/102.R, 174/102.A, 174/103, 174/106.R, 174/107, 174/108, 174/110.R, 174/113.R, 174/113.C, 174/117.R, 174/120.R, 174/126.1, 174/126.2
• US Class Current: 174/126.1
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems

Abstract

A medical electrical lead having an elongated conductor including one or more wires made of a modified MP35N alloy. The modified MP35N alloy is formed from a melt composition modified to reduce an amount of titanium-based inclusion forming elements.

Claims

1. A medical electrical lead comprising an elongated conductor including one or more wires made of a modified MP35N alloy;

wherein the alloy being formed from a melt composition modified to reduce an amount of titanium-based inclusion forming elements;

wherein the inclusion forming elements include titanium and the modification of the melt composition includes eliminating the titanium as an additive to the melt composition; and

wherein the alloy comprises less than approximately 0.001% titanium by weight.

2. The medical electrical lead of claim 1, wherein the conductor being a coiled conductor.

3. The medical electrical lead of claim 1, wherein the conductor being a cabled conductor.

4. The medical electrical lead of claim 1, wherein a minimum diameter of the one or more wires being between approximately 0.0005 inch and approximately 0.01 inch.

5. The medical electrical lead of claim 4, wherein a minimum diameter of the one or more wires being between approximately 0.0005 inch and approximately 0.003 inch.

6. A medical electrical lead comprising an elongated conductor including one or more wires made of a modified MP35N alloy;

wherein the alloy being formed from a melt composition modified to reduce an amount of titanium-based inclusion forming elements; and

wherein the inclusion forming elements include a gaseous oxygen and nitrogen and the modification of the melt composition includes eliminating the gaseous oxygen and nitrogen under high vacuum conditions.

7. A medical electrical lead comprising an elongated conductor including one or more wires made of a modified MP35N alloy;

wherein the alloy comprises less than approximately 0.001% titanium by weight.

8. The medical electrical lead of claim 7, wherein the conductor being a coiled conductor.

9. The medical electrical lead of claim 7, wherein the conductor being a cabled conductor.

10. The medical electrical lead of claim 7, wherein a minimum diameter of the one or more wires being between approximately 0.0005 inch and approximately 0.01 inch.

11. The medical electrical lead of claim 10, wherein a minimum diameter of the one or more wires being between approximately 0.0005 inch and approximately 0.003 inch.

12. A medical electrical lead comprising a conductor including one or more wires made of an MP35N alloy;

wherein the one or more wires comprise titanium-based inclusions, an average number of which being less than 100,000 per square inch.

13. The medical electrical lead of claim 12, wherein the average number of titanium-based inclusions have a maximum diameter not exceeding approximately one micron.

14. The medical electrical lead of claim 12, wherein the conductor being a coiled conductor.

15. The medical electrical lead of claim 12, wherein the conductor being a cabled conductor.

16. The medical electrical lead of claim 12, wherein a minimum diameter of the one or more wires being between approximately 0.0005 inch and approximately 0.01 inch.

17. The medical electrical lead of claim 16, wherein a minimum diameter of the one or more wires being between approximately 0.0005 inch and approximately 0.003 inch.

18. A medical electrical lead comprising an elongated conductor including one or more wires made of a modified MP35N alloy;

the alloy being formed from a melt composition modified to reduce an amount of titanium-based inclusion forming elements;

wherein the inclusion forming elements include titanium, gaseous oxygen and nitrogen and the modification of the melt composition comprises eliminating the titanium as an additive to the melt composition and further comprises eliminating the gaseous oxygen and nitrogen under high vacuum conditions;

wherein the alloy comprises less than approximately 0.001% titanium by weight, and

wherein the one or more wires comprise titanium-based inclusions, an average number of which being less than 100,000 per square inch, having a maximum diameter not exceeding approximately one micron.