Resonator for medical device

• US 20060178576A1
• Filed: 08/19/2005
• Published: 08/10/2006
• Est. Priority Date: 02/04/2005
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Weber, Jan, Miller, Matthew J.
• Granted Patent: US 8,066,759 B2
• Time in Patent Office: Days
• US Class Current: 600/422
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: G01R 33/28 Details of apparatus provided for in groups G01R33/44 - G01R33/64
• CPC Class Codes: G01R 33/34046 Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
• CPC Class Codes: G01R 33/34053 Solenoid coils; Toroidal coils
• CPC Class Codes: G01R 33/34084 implantable coils or coils being geometrically adaptable to the sample, e.g. flexible coils or coils comprising mutually movable parts

Abstract

A resonator device for medical device is provided. The resonator device includes a helical structure and a capacitor structure. The resonator device can be used in conjunction with a medical device, including a stent.

Claims

1. A resonator device for implanting in a body, comprising:

an induction coil with a lumen having a deployed diameter;

a capacitor coupled in series to the induction coil that interacts with a radio frequency field to reduce signal loss in images obtained in a magnetic resonance imaging system; and

a non-conductive sheath coupled to the induction coil and the capacitor.

2. The resonator device of claim 1, where the non-conductive sheath includes a predetermined configuration that supports and maintains the induction coil in the deployed diameter.

3. The resonator device of claim 1, where the induction coil includes a predetermined configuration that supports and maintains the induction coil in the deployed diameter.

4. The resonator device of claim 1, where the non-conductive sheath encases the induction coil.

5. The resonator device of claim 1, including a stent positioned within the lumen of the induction coil.

6. The resonator device of claim 5, where the stent includes a surface defining a lumen, and the induction coil includes a wound spiral of two or more turns of a conductor, where the conductor passes the surface to position turns of the conductor within the lumen and outside the lumen of the stent.

7. The resonator device of claim 6, where the turns of the conductor alternate passing from within the lumen to outside the lumen.

8. The resonator device of claim 1, where the induction coil is woven through openings in a stent.

9. The resonator device of claim 1, where the non-conductive sheath is a tube having a diameter that can expand to approximately equal the deployed diameter of the induction coil.

10. The resonator device of claim 9, where the tube encases the induction coil.

11. The resonator device of claim 9, where the tube includes a peripheral surface on which the induction coil is positioned.

12. The resonator device of claim 9, where the induction coil is a thin film conductor.

13. The resonator device of claim 9, including a stent positioned at least partially within a lumen of the tube.

14. The resonator device of claim 9, where the tube includes a first end and a second end, the tube having a first expandable support member at the first end and a second expandable support member at the second end, where the first and second expandable support members are electrically isolated from the induction coil.

15. The resonator device of claim 1, where the induction coil includes a helical coil structure.

16. The resonator device of claim 15, where the helical coil structure includes a zig-zag configuration.

17. The resonator device of claim 1, where the non-conductive sheath includes one or more therapeutic agents.

18. The resonator device of claim 1, including a stent positioned outside the lumen of the induction coil.

19. The resonator device of claim 1, where the induction coil includes a first electrical contact and a second electrical contact that electrically couple the induction coil and the capacitor to a stent.

20. The resonator device of claim 1, where the induction coil includes a first end and a second end opposite the first end, and where the deployed diameter of the lumen changes from the first end to the second end of the induction coil.

21. A system, comprising:

a stent having structural members defining a lumen, an outer surface opposite the lumen and openings between the structural members; and

a resonator device having;

an induction coil that includes a wound spiral of a conductor;

a capacitor coupled in series to the induction coil that interacts with a radio frequency field to reduce signal loss in images obtained in a magnetic resonance imaging system; and

a non-conductive sheath that electrically insulates the induction coil from the stent, where the wound spiral of the induction coil passes through the openings between the structural members to provide at least one complete turn of the induction coil within the lumen of the stent and at least one complete turn of the induction coil on the other surface of the stent.

22. The system of claim 21, where the wound spiral of the induction coil alternates passing from within the lumen to the outer surface of the stent.

23. The system of claim 21, where the induction coil includes a zig-zag configuration.

24. The system of claim 21, where the induction coil includes a non-conductive sheath that supports and maintains the wound spiral.

25. The system of claim 21, where the non-conductive sheath includes one or more therapeutic agents.

26. A system, comprising:

a resonator device having;

a first induction coil having a wound spiral of two or more turns of a conductor that define a coil lumen;

a second induction coil having a wound spiral of two or more turns positioned at least partially within the coil lumen of the first induction coil; and

a capacitor coupled in series with at least one of the first induction coil and the second induction coil; and

a stent positioned at least partially between the first induction coil and the second induction coil.

27. The system of claim 26, where the capacitor is coupled in series to the first induction coil and the second induction coil.

28. The system of claim 26, including a second capacitor, where the first induction coil is coupled in series to the capacitor, and the second induction coil is coupled in series to the second capacitor.

29. The system of claim 28, where the first induction coil coupled in series to the capacitor is electrically insulated from the second induction coil coupled in series to the second capacitor.

30. The system of claim 26, where the resonator device includes a non-conductive sheath that supports the first and second induction coils.

31. The system of claim 30, where the non-conductive sheath is a tube having a diameter approximately equal the coil lumen of the first induction coil.

32. The system of claim 31, where the tube encases each of the first and second induction coils.

33. The system of claim 32, where the tube encases the stent.

34. The system of claim 30, where at least one of the first induction coil and the second induction coil is a thin film conductor.