Polymer reinforced coil conductor for torque transmission

• US 20070179582A1
• Filed: 01/31/2006
• Published: 08/02/2007
• Est. Priority Date: 01/31/2006
• Status: Abandoned Application

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Marshall, Mark, Shroder, Henry
• Application Number:
  US11/343,884
• Publication Number:
  US 20070179582A1
• Time in Patent Office: Days
• US Class Current: 607/119
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: A61N 1/0573 chacterised by means penetrating the heart tissue, e.g. helix needle or hook

Abstract

A coil conductor for connecting an electrode near a distal end of a medical electrical lead with an implantable medical device (IMD) connected with a proximal end of the medical electrical lead includes a multi-filar coil and a torque enhancing sheathing. The multi-filar coil comprises a co-radially wound, multi-filar coil that has an inductance of approximately 1.5 μH or greater. The sheathing is extruded over to enhance the torque transmitting properties of the coil conductor.

Claims

1. A conductor for connecting an electrode near a distal end of a medical electrical lead with an implantable medical device connected with a proximal end of the medical electrical lead, the conductor comprising:

a co-radially wound, multi-filar coil for forming a circuit between the electrode and the implantable medical device, the coil having an RF field compatible inductance; and

a sheathing continuously extending from near a proximal end of the coil to near a distal end of the coil for enhancing torque transmitting properties of the coil.

2. The conductor of claim 1 wherein the electrode comprises a fixation device.

3. The conductor of claim 1 wherein the coil includes a RF field compatible inductance of approximately 1.5 μ

H or greater.

4. The conductor of claim 1 wherein the co-radially wound, multi-filar coil comprises two filars.

5. The conductor of claim 1 wherein the sheathing comprises a polymer jacket.

6. The conductor of claim 1 wherein the sheathing includes a thickness of approximately 0.001″

.

7. The conductor of claim 1 wherein the sheathing is extruded over the multi-filar coil to form a rigid jacket bonded to the coil.

8. A lead for a medical electrical device, the lead comprising:

a lead body including a lumen extending from a proximal end to a distal end;

a co-radially wound, multi-filar coil conductor extending through the lumen and having an RF field compatible inductance; and

a jacket for restricting radial expansion of the multi-filar coil conductor.

9. The lead of claim 8 wherein the co-radially wound, multi-filar coil conductor comprises two filars.

10. The lead of claim 8 wherein the coil conductor includes a RF field compatible inductance of approximately 1.5 μ

H or greater.

11. The lead of claim 8 wherein the jacket comprises a polymer sheathing.

12. The lead of claim 8 wherein the jacket includes a thickness of approximately 0.001″

.

13. The lead of claim 8 wherein the jacket enhances the torque transmitting properties of the multi-filar coil.

14. The lead of claim 8 wherein the coil conductor is connected with a fixation device.

15. The lead of claim 14 wherein the jacket enables the coil conductor to transmit torque for rotating the fixation device.

16. A medical electrical lead comprising:

a lead body;

an electrode fixation device carried at a distal end of the lead body;

a torque coil extending through the lead body from a proximal end to the distal end, the torque coil having winding characteristics such that the inductance of the coil is approximately 1.5 μ

H or greater; and

a sheathing enveloping the torque coil which enables the torque coil to transmit torque from a proximal end to a distal of the coil end for rotating the fixation device.

17. The lead of claim 16 wherein the torque coil comprises a co-radially wound, bi-filar coil.

18. The lead of claim 16 wherein the sheathing comprises a polymer jacket.

19. The lead of claim 16 wherein the sheathing is extruded over the torque coil to form a rigid jacket bonded to the coil.

20. The lead of claim 16 wherein the sheathing includes a thickness of approximately 0.001″

.