Electrical lead for an electronic device such as an implantable device

• US 8,649,842 B2
• Filed: 01/14/2013
• Issued: 02/11/2014
• Est. Priority Date: 05/04/2005
• Status: Active Grant

• Current Assignee: Boston Scientific Neuromodulation Corporation (Boston Scientific Corporation), MRI Interventions, Inc. (Clearpoint Neuro, Inc.)
• Original Assignee: Boston Scientific Neuromodulation Corporation (Boston Scientific Corporation), MRI Interventions, Inc. (Clearpoint Neuro, Inc.)
• Inventors: Atalar, Ergin, Ferhanoglu, Onur
• Primary Examiner(s): Layno, Carl H
• Assistant Examiner(s): Morales, Jon Eric C
• Application Number:
  US13/741,009
• Publication Number:
  US 20130178924A1
• Time in Patent Office: 393 Days
• Field of Search: 607/105, 607/116, 600/374
• US Class Current: 600/374
• 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 1/086 Magnetic resonance imaging [MRI] compatible leads
• CPC Class Codes: A61N 1/3718 Monitoring of or protection against external electromagnetic fields or currents

Abstract

A lead for an electronic device which resists the induction of a current from an electromagnetic field external to said lead includes one or more pairs of adjacent segments of electrical wire, each of the pairs including a first segment of electrical wire and a second segment of electrical wire. The lead also includes one or more shielded RF chokes, wherein each of the shielded RF chokes is provided between the first segment of electrical wire and the second segment of electrical wire of a respective one of the one or more pairs of adjacent segments. Also, an implantable device that includes a generator for generating one or more electrical pulse and a lead as described for delivering the pulses to tissue within a patient'"'"'s body. A method for making the described implantable device is also provided.

Claims

1. An implantable lead which resists induction of a current from an electromagnetic field external to the lead, comprising:

a plurality of pairs of adjacent segments of electrical wire, each pair comprising a first segment of electrical wire and a second segment of electrical wire; and

a plurality of RF chokes, each RF choke being provided between, and operatively coupled to, the first segment of electrical wire and the second segment of electrical wire of a respective one of the plurality of pairs of adjacent segments,

wherein each RF choke is configured and arranged to resist current flow at an RF field frequency of a MRI device and pass currents of substantially lower frequency than the RF field frequency of the MRI device.

2. The lead of claim 1, wherein each RF choke comprises an inductor.

3. The lead of claim 2, wherein each RE choke further comprises an electrical shielding material disposed around the inductor.

4. The lead of claim 3, wherein a first end of the electrical shielding material is electrically connected to the inductor.

5. The lead of claim 4, further comprising an insulating material disposed around at least a portion of the adjacent segments of electrical wire, wherein a second end of the electrical shielding material is floating or touches the insulating material.

6. The lead of claim 2, wherein each inductor comprises a core.

7. The lead of claim 2, wherein at least one of the inductors is a toroidal inductor.

8. An implantable stimulation apparatus which resists the induction of a current from an electromagnetic field external to said apparatus, comprising:

a generator for generating one or more electrical pulses; and

the lead of claim 1 coupleable to the generator.

9. The implantable stimulation apparatus of claim 8, wherein the lead is configured and arranged for deep brain stimulation.

10. The implantable stimulation apparatus of claim 8, wherein the apparatus is a neurostimulator.

11. The implantable stimulation apparatus of claim 8, wherein the apparatus is a pacemaker or a cardio defibrillator.

12. An implantable lead which resists induction of a current from an electromagnetic field external to the lead, comprising:

a plurality of pairs of adjacent segments of electrical wire, each pair comprising a first segment of electrical wire and a second segment of electrical wire; and

a plurality of RF chokes, each RF choke being provided between, and operatively coupled to, the first segment of electrical wire and the second segment of electrical wire of a respective one of the plurality of pairs of adjacent segments,

wherein each RF choke is configured and arranged to trap an electromagnetic field within a confined area in order to resist penetration of an external electromagnetic field into the confined area.

13. The lead of claim 12, wherein each RF choke comprises an inductor.

14. The lead of claim 13, wherein each RF choke further comprises an electrical shielding material disposed around the inductor.

15. An implantable stimulation apparatus which resists the induction of a current from an electromagnetic field external to said apparatus, comprising:

a generator for generating one or more electrical pulses having a generator frequency; and

an implantable lead coupleable to the generator, the lead comprising

a plurality of pairs of adjacent segments of electrical wire, each pair comprising a first segment of electrical wire and a second segment of electrical wire; and

a plurality of RF chokes, each RF choke being provided between, and operatively coupled to, the first segment of electrical wire and the second segment of electrical wire of a respective one of the plurality of pairs of adjacent segments,

wherein each RF choke is configured and arranged to resist current flow at an RF field frequency of a MRI device and to pass the electrical pulses from the generator, wherein the generator frequency of the electrical, pulses is substantially less than the RF field frequency of the MRI device.

16. The implantable stimulation apparatus of claim 15, wherein the lead is configured and arranged for deep brain stimulation.

17. The implantable stimulation apparatus of claim 15, wherein the apparatus is a neurostimulator.

18. The implantable stimulation apparatus of claim 15, wherein the apparatus is a pacemaker or a cardio defibrillator.

19. The implantable stimulation apparatus of claim 15, wherein each RF choke comprises an inductor.

20. The implantable stimulation apparatus of claim 19, wherein each RF choke further comprises an electrical shielding material disposed around the inductor.