PAIRED MEDICAL LEAD BODIES WITH BRAIDED CONDUCTIVE SHIELDS HAVING DIFFERENT PHYSICAL PARAMETER VALUES

• US 20170014623A1
• Filed: 09/28/2016
• Published: 01/19/2017
• Est. Priority Date: 04/19/2012
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Bondhus, Spencer, Stem, Bryan, Conroy, Mark
• Granted Patent: US 9,907,956 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 1/08 Arrangements or circuits for monitoring, protecting, controlling or indicating for external stimulators A61N1/3603; for implantable neurostimulators A61N1/36128; for heart stimulators A61N1/37; for defibrillators A61N1/3925
• CPC Class Codes: A61N 1/086 Magnetic resonance imaging [MRI] compatible leads
• CPC Class Codes: A61N 1/3718 Monitoring of or protection against external electromagnetic fields or currents

Abstract

Medical lead bodies that are paired each include a braided conductive shield. The braided conductive shield of one lead body has a value for a physical parameter that differs from a value for the physical parameter of the second lead body. The difference in values of the physical parameter for the paired lead bodies results in a reduction in heating from exposure of the lead bodies to radiofrequency energy at electrodes associated with the lead bodies. The lead bodies may be paired by being implanted adjacently to one another. The lead bodies may be further paired by being coupled to a same distal body, such as a paddle containing the electrodes.

Claims

1. A medical lead, comprising:

a first lead body housing a first filar connected to a first proximal contact on the first lead body, the first lead body having a first braided conductive shield with a first value of a weave angle;

a second lead body housing a second filar connected to a second proximal contact on the second lead body, the second lead body having a second braided conductive shield with a second value of the weave angle that is different than the first value; and

a body housing a plurality of electrodes, the body being coupled to the distal end of the first and second lead bodies with a first electrode of the plurality connected to the first filar and a second electrode of the plurality connected to the second filar.

2. The medical lead of claim 1, wherein the first braided conductive shield has a first value of a shield parameter other than weave angle wherein the second braided conductive shield has a second value for the shield parameter other than the weave angle that is different than the first value of the shield parameter other than the weave angle.

3. The medical lead of claim 1, wherein the first braided conductive shield comprises tantalum.

4. The medical lead of claim 1, wherein the first braided conductive shield is embedded within the first lead body.

5. A medical lead, comprising:

a first lead body housing a first filar connected to a first proximal contact on the first lead body, the first lead body having a first braided conductive shield with a first value of a shield diameter;

a second lead body that is entirely outside of the first lead body with the first lead body being entirely outside of the second lead body, the second lead body housing a second filar connected to a second proximal contact on the second lead body, the second lead body having a second braided conductive shield with a second value of the shield diameter that is different than the first value; and

a body housing a plurality of electrodes, the body being coupled to the distal end of the first and second lead bodies with a first electrode of the plurality connected to the first filar and a second electrode of the plurality connected to the second filar.

6. The medical lead of claim 5, wherein the first braided conductive shield has a first value of a shield parameter other than shield diameter wherein the second braided conductive shield has a second value for the shield parameter other than the shield diameter that is different than the first value of the shield parameter other than the shield diameter.

7. The medical lead of claim 5, wherein the first braided conductive shield comprises tantalum.

8. The medical lead of claim 5, wherein the first braided conductive shield is embedded within the first lead body.

9. A medical lead, comprising:

a first lead body housing a first filar connected to a first proximal contact on the first lead body, the first lead body having a first braided conductive shield with a first value of a braid wire conductivity;

a second lead body housing a second filar connected to a second proximal contact on the second lead body, the second lead body having a second braided conductive shield with a second value of the braid wire conductivity that is different than the first value; and

a body housing a plurality of electrodes, the body being coupled to the distal end of the first and second lead bodies with a first electrode of the plurality connected to the first filar and a second electrode of the plurality connected to the second filar.

10. The medical lead of claim 9, wherein the first braided conductive shield has a first value of a shield parameter other than braid wire conductivity wherein the second braided conductive shield has a second value for the shield parameter other than the braid wire conductivity that is different than the first value of the shield parameter other than braid wire conductivity.

11. The medical lead of claim 9, wherein the first braided conductive shield comprises tantalum.

12. The medical lead of claim 9, wherein the first braided conductive shield is embedded within the first lead body.

13. A medical lead, comprising:

a first lead body housing a first filar connected to a first proximal contact on the first lead body, the first lead body having a first braided conductive shield with a first number of braid wires;

a second lead body housing a second filar connected to a second proximal contact on the second lead body, the second lead body having a second braided conductive shield with a second number of braid wires that is different than the first value; and

a body housing a plurality of electrodes, the body being coupled to the distal end of the first and second lead bodies with a first electrode of the plurality connected to the first filar and a second electrode of the plurality connected to the second filar.

14. The medical lead of claim 13, wherein the first braided conductive shield has a first value of a shield parameter other than the number of braid wires wherein the second braided conductive shield has a second value for the shield parameter other than the number of braid wires that is different than the first value of the shield parameter other than the number of braid wires.

15. The medical lead of claim 13, wherein the first braided conductive shield comprises tantalum.

16. The medical lead of claim 13, wherein the first braided conductive shield is embedded within the first lead body.