MRI COMPATIBLE LEAD EMPLOYING MULTIPLE MINIATURE INDUCTORS

• US 20110152990A1
• Filed: 12/22/2009
• Published: 06/23/2011
• Est. Priority Date: 12/22/2009
• Status: Abandoned Application

• Current Assignee: Pacesetter Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Pacesetter Incorporated (Abbott Laboratories Incorporated)
• Inventors: Zhang, Jin, Anderson, Dave, Coppola, Benjamin, Shehada, Ramez, Min, Xiaoyi, Bornzin, Gene A., Doan, Phong D.
• Application Number:
  US12/645,252
• Publication Number:
  US 20110152990A1
• Time in Patent Office: Days
• US Class Current: 607/127
• 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: H03H 2007/013 Notch or bandstop filters
• CPC Class Codes: H03H 7/0115 comprising only inductors and capacitors H03H7/075, H03H7/09, H03H7/12, H03H7/13 take precedence

Abstract

An implantable medical lead is disclosed herein. The lead includes a first electrode and a first electrical circuit. The first electrode is near a distal portion of the lead. The first electrical circuit extends through the lead to the first electrode and includes at least one conductor and a first band stop filter coupled between the distal end of the conductor and the electrode. The first band stop filter includes a first group of inductors in parallel and a second group of inductors in parallel. The first group is in series with the second group. The first group of inductors may include a self resonant L. The first group of inductors may include a self resonant tank LC. The first group of inductors may include a miniature self resonant L or miniature self resonant tank LC. The first group of inductors may include an integrated circuit of L and C components.

Claims

1. An implantable medical lead comprising:

a first electrode near a distal portion of the lead; and

a first electrical circuit extending through the lead to the first electrode, the first electrical circuit comprising at least one conductor and a first band stop filter coupled between the conductor and the electrode, the first band stop filter comprising a first group of inductors in parallel and a second group of inductors in parallel, the first group in series with the second group.

2. The lead of claim 1, wherein the first group of inductors includes a self resonant L.

3. The lead of claim 1, wherein the first group of inductors includes a self resonant tank LC.

4. The lead of claim 1, wherein the first group of inductors includes a miniature self resonant L or miniature self resonant tank LC.

5. The lead of claim 1, wherein the first group of inductors includes a self resonant L including DFT wire.

6. The lead of claim 5, wherein the DFT wire includes ETFE outer layer.

7. The lead of claim 1, wherein the first group of inductors includes an integrated circuit of L and C components.

8. The lead of claim 1, wherein the first electrode includes a tip electrode.

9. The lead of claim 8, wherein the tip electrode includes a helical anchor.

10. The lead of claim 1, wherein the first band stop filter is embedded in a polymer material.

11. The lead of claim 10, wherein the polymer material includes PEBAX.

12. The lead of claim 1, wherein the first band stop filter is enclosed in a hermetic seal.

13. The lead of claim 1, wherein the band stop filter further includes a PC board supporting the first and second groups of inductors.

14. The lead of claim 1, further comprising a second electrode near the distal portion of the lead and a second electrical circuit extending through the lead to the second electrode and comprising a second band stop filter comprising a third group of inductors in parallel and a fourth group of inductors in parallel, the third group in series with the fourth group.

15. The lead of claim 14, wherein the first electrode is distal the second electrode.

16. The lead of claim 14, wherein the first electrode includes a tip electrode and the second electrode includes a ring electrode.

17. The lead of claim 14, wherein the second electrode includes a ring electrode and the second band stop filter is located radially inward of the second ring electrode.

18. The lead of claim 1, wherein the first group of inductors is supported by a first inflexible substrate and the second group of inductors is supported by a second inflexible substrate, the first and second inflexible substrates coupled together via a flexible substrate.

19. An implantable medical lead comprising:

a first electrode near a distal portion of the lead; and

a first electrical circuit extending through the lead to the first electrode, the first electrical circuit comprising at least one conductor and a first band stop filter coupled between the conductor and the electrode, the first band stop filter comprising a first group of inductors in series and a second group of inductors in series, the first group in parallel with the second group.

20. The lead of claim 19, wherein the first group of inductors includes at least one of a self resonant L, a self resonant tank LC or an integrated circuit of L and C components.

21. The lead of claim 19, further comprising a second electrode near the distal portion of the lead and a second electrical circuit extending through the lead to the second electrode and comprising a second band stop filter comprising a third group of inductors in series and a fourth group of inductors in series, the third group in parallel with the fourth group.

22. The lead of claim 20, wherein the first electrode includes a tip electrode and the second electrode includes a ring electrode.

23. The lead of claim 19, wherein the first group of inductors is supported by a first inflexible substrate and the second group of inductors is supported by a second inflexible substrate, the first and second inflexible substrates coupled together via a flexible substrate.