IP Library › Granted Patent US 7,388,378
Granted Patent B2
US 7,388,378 · App. 11/248,862 · Granted Jun 17, 2008

Magnetic resonance imaging interference immune device

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Quick Facts
Patent No.
US 7,388,378
App. No.
11/248,862
Granted
Jun 17, 2008
Kind
B2
Abstract

A medical assembly includes a multi-wire lead having a plurality of coiling loops. The multi-wire lead has a gap region and a non-gap region. The gap region has adjacent coiling loops of the multi-wire lead with gaps therebetween so as to form different impedance in the gap region than impedance in the non-gap region. The non-gap region has adjacent coiling loops of the multi-wire lead with no gaps therebetween. The gaps may provide inter-loop capacitance. The multi-wire lead may have a plurality of gap regions, each gap region having a non-gap region therebetween.

Claims (41)

1. A medical assembly, comprising:

a multi-wire lead having a plurality of coiling loops;

said multi-wire lead having a gap region and a non-gap region;

said gap region having adjacent coiling loops of said multi-wire lead with predefined gaps therebetween;

said non-gap region having adjacent coiling loops of said multi-wire lead with no gaps therebetween.

2. The medical assembly as claimed in claim 1 , wherein said predefined gaps provide inter-loop capacitance.

3. The medical assembly as claimed in claim 1 , wherein said gap region forms different impedance in said gap region than impedance in said non-gap region.

4. The medical assembly as claimed in claim 1 , wherein said multi-wire lead has a plurality of gap regions, each gap region having a non-gap region therebetween.

5. The medical assembly as claimed in claim 1 , wherein said multi-wire lead is a deep brain stimulation lead.

6. The medical assembly as claimed in claim 1 , wherein said multi-wire lead is a pacing lead.

7. The medical assembly as claimed in claim 1 , wherein said multi-wire lead is a pacing lead.

8. A medical assembly, comprising:

a multi-wire lead having a plurality of coiling loops;

said multi-wire lead having a gap region and a non-gap region;

said gap region having adjacent coiling loops of said multi-wire lead with gaps therebetween wherein a width of said gap is adjusted to modify an electrical property of said multi-wire lead;

said non-gap region having adjacent coiling loops of said multi-wire lead with no gaps therebetween.

9. A medical assembly, comprising:

a multi-wire lead having a plurality of coiling loops;

said multi-wire lead having a gap region and a non-gap region;

said gap region having adjacent coiling loops of said multi-wire lead with gaps therebetween wherein said gaps include a material therein, said material adjusting an electrical property of said multi-wire lead;

said non-gap region having adjacent coiling loops of said multi-wire lead with no gaps therebetween.

10. A medical assembly, comprising: a multi-wire lead having a plurality of wires, each wire having a plurality of coiling loops; said multi-wire lead having a gap region and a non-gap region; said gap region having a first gap between a coiling loop of a first wire and a coiling loop of a second wire; said non-gap region having a second gap between a coiling loop of a first wire and a coiling loop of a second wire, said first gap being greater than said second gap.

11. The medical assembly as claimed in claim 10 , wherein said gap region forms different impedance in said gap region than impedance in said non-gap region.

12. The medical assembly as claimed in claim 10 , wherein said multi-wire lead has a plurality of gap regions, each gap region having a non-gap region therebetween.

13. The medical assembly as claimed in claim 10 , wherein said multi-wire lead is a deep brain stimulation lead.

14. The medical assembly as claimed in claim 10 , wherein a width of said gap is adjusted to modify an electrical property of said multi-wire lead.

15. The medical assembly as claimed in claim 10 , wherein said gaps include a material therein, said material adjusting an electrical property of said multi-wire lead.

16. The medical assembly as claimed in claim 10 , wherein said multi-wire lead is a pacing lead.

17. A medical assembly, comprising: a multi-wire lead having a plurality of wires, each wire having a plurality of coiling loops; said multi-wire lead having a gap region and a non-gap region; said gap region having a first lead intra-coiling loop gap between a first coiling loop of a first wire and a second coiling loop of the first wire; said non-gap region having a second lead intra-coiling loop gap between a third coiling loop of the first wire and a fourth coiling loop of the first wire, said first lead intra-coiling loop gap being greater than said lead intra-coiling loop second gap.

18. The medical assembly as claimed in claim 17 , wherein said gap region forms different impedance in said gap region than impedance in said non-gap region.

19. The medical assembly as claimed in claim 17 , wherein said multi-wire lead has a plurality of gap regions, each gap region having a non-gap region therebetween.

20. The medical assembly as claimed in claim 17 , wherein said multi-wire lead is a deep brain stimulation lead.

21. The medical assembly as claimed in claim 17 , wherein a width of said gap is adjusted to modify an electrical property of said multi-wire lead.

22. The medical assembly as claimed in claim 17 , wherein said gaps include a material therein, said material adjusting an electrical property of said multi-wire lead.

23. A medical assembly, comprising: a multi-wire lead having a plurality of conductive wires and a plurality of non-conductive wires, each conductive wire having a plurality of coiling loops, each non-conductive wire having a plurality of coiling loops; said coiling loops of a non-conductive wire being positioned between adjacent coiling loops of two conductive wires to form a lead intra-coiling loop non-conductive gap between the adjacent coiling loops of two conductive wires.

24. The medical assembly as claimed in claim 23 , wherein said non-conductive wires are polymer wires.

25. The medical assembly as claimed in claim 23 , wherein said multi-wire lead has a gap region and a non-gap region; said gap region having a first lead intra-coiling loop gap between a first coiling loop of a first wire and a second coiling loop of the first wire; said non-gap region having a second lead intra-coiling loop gap between a third coiling loop of the first wire and a fourth coiling loop of the first wire, said first lead intra-coiling loop gap being greater than said lead intra-coiling loop second gap.

26. The medical assembly as claimed in claim 25 , wherein said gap region forms different impedance in said gap region than impedance in said non-gap region.

27. The medical assembly as claimed in claim 25 , wherein said multi-wire lead has a plurality of gap regions, each gap region having a non-gap region therebetween.

28. The medical assembly as claimed in claim 25 , wherein said multi-wire lead is a deep brain stimulation lead.

29. The medical assembly as claimed in claim 25 , wherein said multi-wire lead is a pacing lead.