INDUCTIVE ELEMENT FOR PROVIDING MRI COMPATIBILITY IN AN IMPLANTABLE MEDICAL DEVICE LEAD

• US 20140114383A1
• Filed: 10/17/2013
• Published: 04/24/2014
• Est. Priority Date: 10/18/2012
• Status: Active Grant

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: Foster, Arthur J., Grover, Joel P., Lenz, Jason T., Koop, Brendan E., Evert, Linda L.
• Granted Patent: US 8,983,623 B2
• Time in Patent Office: Days
• US Class Current: 607/116
• 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 1/0587 Epicardial electrode systems; Endocardial electrodes piercing the pericardium
• CPC Class Codes: A61N 1/086 Magnetic resonance imaging [MRI] compatible leads

Abstract

A system includes a medical device lead including a connector at a proximal end of the lead, a conductor electrically connected to the connector at a proximal end of the conductor, and at least one electrode coupled to a distal end of the conductor. The system further includes a device securable to the proximal end of the lead including an inductive element. The device includes a port configured to receive the connector and position the inductive element around at least a portion of the connector.

Claims

1. A system comprising:

a medical device lead including;

a connector at a proximal end of the lead;

a conductor electrically connected to the connector at a proximal end of the conductor; and

at least one electrode coupled to a distal end of the conductor; and

a device securable to the proximal end of the lead and comprising an inductive element, the device including a port configured to receive the connector and position the inductive element around at least a portion of the connector.

2. The system of claim 1, wherein the device comprises a lead cap configured to cover the proximal end of the lead.

3. The system of claim 2, wherein the lead cap includes a connector block configured to electrically couple the lead cap with the connector on the lead to electrically terminate the lead.

4. The system of claim 1, wherein the device comprises a lead adapter.

5. The system of claim 4, wherein the lead adapter further comprises a lead adapter connector configured to electrically couple with the connector on the lead, and wherein the lead adapter is configured to electrically and mechanically connect the lead to an implantable pulse generator.

6. The system of claim 5, wherein the lead adapter includes a connector block configured to electrically couple the lead adapter with the connector on the lead.

7. The system of claim 1, wherein the inductive element comprises a coil, and wherein a winding direction of the coil is the same as a winding direction of the conductor.

8. The system of claim 1, wherein the conductor defines a lumen that extends through the lead, and wherein the system further comprises:

an inductive lumen coil positionable within the lumen proximate the distal end of the conductor.

9. The system of claim 1, wherein the inductive element comprises one or more filars wound in a plurality of coil layers, a first coil layer of the one or more filars wound in a first winding direction, a second coil layer of the one or more filars coaxial with the first winding and wound in a second winding direction opposite the first winding direction, and a third coil layer of the one or more filars coaxial with the first and second windings and wound in the first winding direction.

10. A device for transforming a non-MR conditional lead into an MRI conditionally safe lead, the device comprising:

an insulative housing including a port configured to receive a connector of the non-MR conditional lead; and

an inductive element disposed around at least a portion of the port and positioned within the housing such that the inductive element surrounds at least a portion of the connector from the non-MR conditional lead when the connector is received in the port.

11. The device of claim 10, wherein the device is configured as a lead cap for covering the proximal end of the non-MR conditional lead.

12. The device of claim 11, and further comprising:

a connector block configured to electrically couple the device with the connector on the lead such that the connector block electrically terminates the non-MR conditional lead.

13. The device of claim 10, wherein the device is configured as a lead adapter, and further comprises:

a lead adapter connector configured to electrically couple with the connector of the non-MR conditional lead, and wherein the lead adapter is configured to electrically and mechanically connect the non-MR conditional lead to an implantable pulse generator.

14. The device of claim 13, and further comprising:

a connector block configured to electrically couple the device with the connector on the non-MR conditional lead.

15. The device of claim 10, wherein the inductive element comprises a coil, and wherein a winding direction of the coil is the same as a winding direction of a conductor in the non-MR conditional lead.

16. The device of claim 10, wherein the inductive element comprises one or more filars wound in a plurality of coil layers, a first coil layer of the one or more filars wound in a first winding direction, a second coil layer of the one or more filars coaxial with the first winding and wound in a second winding direction opposite the first winding direction, and a third coil layer of the one or more filars coaxial with the first and second windings and wound in the first winding direction.

17. A lead assembly comprising:

a non-MR conditional medical device lead including a connector at a proximal end of the lead, a conductor electrically connected to the connector at a proximal end of the conductor, and at least one electrode coupled to a distal end of the conductor; and

an inductive element secured to the proximal end of the lead and comprising a coil, the inductive element including a port that receives the connector and positions the coil around at least a portion of the connector.

18. The lead assembly of claim 17, wherein the inductive element comprises a lead cap that covers the proximal end of the non-MR conditional medical device lead.

19. The lead assembly of claim 17, wherein the inductive element comprises a lead adapter, and wherein the lead adapter further comprises a lead adapter connector electrically coupled with the connector on the non-MR conditional medical device lead, and wherein the lead adapter is configured to electrically and mechanically connect the electrically coupled lead to an implantable pulse generator.

20. The lead assembly of claim 17, wherein the inductive element comprises a coil, and wherein a winding direction of the coil is the same as a winding direction of the conductor.