ELECTROMAGNETIC RESONANT CIRCUIT SLEEVE FOR IMPLANTABLE MEDICAL DEVICE

• US 20070010895A1
• Filed: 05/19/2006
• Published: 01/11/2007
• Est. Priority Date: 05/19/2005
• Status: Abandoned Application

• Current Assignee: Biophan Technologies Incorporated
• Original Assignee: Biophan Technologies Incorporated
• Inventors: Gray, Robert, MacDonald, Stuart, Melzer, Andreas
• Application Number:
  US11/419,269
• Publication Number:
  US 20070010895A1
• Time in Patent Office: Days
• US Class Current: 623/23.700
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2250/0001 Means for transferring electromagnetic energy to implants

Abstract

A medical device enables effective magnetic resonance imaging inside a lumen of a medical device. The medical device includes a plurality of conductive traces formed on a substrate. The conductive traces form an inductive-capacitance circuit or a resistive-inductive-capacitance circuit. The inductive-capacitance circuit or resistive-inductive-capacitance circuit is tuned to a frequency associated with magnetic resonance imaging, an operating frequency associated with a magnetic resonance imaging scanner, a harmonic of an operating frequency associated with a magnetic resonance imaging scanner, or a sub-harmonic of an operating frequency associated with a magnetic resonance imaging scanner.

Claims

1. An implantable medical device, comprising:

a stent;

a substrate surrounding a portion of said stent; and

a plurality of conductive traces formed on said substrate, said conductive traces forming an inductive-capacitance circuit, said inductive-capacitance circuit being tuned to a frequency such that an effective resonance frequency of said stent, inductive-capacitance circuit, and surrounding in vitro conditions is substantially equal to a frequency associated with magnetic resonance imaging.

2. The device as claimed in claim 1, wherein said conductive traces form a resistive inductive-capacitance circuit, said resistive-inductive-capacitance circuit being tuned to a frequency such that an effective resonance frequency of said stent, resistive-inductive-capacitance circuit, and surrounding in vitro conditions is substantially equal to a frequency associated with magnetic resonance imaging.

3. The device as claimed in claim 1, wherein said inductive-capacitance circuit is tuned to a frequency such that an effective resonance frequency of said stent, inductive-capacitance circuit, and surrounding in vitro conditions is substantially equal to an operating frequency of a magnetic resonance imaging scanner.

4. The device as claimed in claim 2, wherein said resistive-inductive-capacitance circuit is tuned to a frequency such that an effective resonance frequency of said stent, resistive-inductive-capacitance circuit and surrounding in vitro conditions is substantially equal to an operating frequency of a magnetic resonance imaging scanner.

5. The device as claimed in claim 1, wherein said inductive-capacitance circuit is tuned to a frequency such that an effective resonance frequency of said stent, inductive-capacitance circuit, and surrounding in vitro conditions is substantially equal to a harmonic frequency of an operating frequency associated with a magnetic resonance imaging scanner.

6. The device as claimed in claim 2, wherein said resistive-inductive-capacitance circuit is tuned to a frequency such that an effective resonance frequency of said stent, resistive-inductive-capacitance circuit and surrounding in vitro conditions is substantially equal to a harmonic frequency of an operating frequency associated with a magnetic resonance imaging scanner.

7. The device as claimed in claim 1, wherein said inductive-capacitance circuit is tuned to a frequency such that an effective resonance frequency of said stent, inductive-capacitance circuit, and surrounding in vitro conditions is substantially equal to a sub-harmonic frequency of an operating frequency associated with a magnetic resonance imaging scanner.

8. The device as claimed in claim 2, wherein said resistive-inductive-capacitance circuit is tuned to a frequency such that an effective resonance frequency of said stent, resistive-inductive-capacitance circuit and surrounding in vitro conditions is substantially equal to a sub-harmonic frequency of an operating frequency associated with a magnetic resonance imaging scanner.

9. The device as claimed in claim 1, further comprising a discrete capacitor operatively connected to said traces and attached to said substrate.

10. The device as claimed in claim 1, wherein said substrate is biodegradable.

11. The device as claimed in claim 1, wherein said substrate is thermally degradable.

12. The device as claimed in claim 1, wherein said substrate is chemically degradable.

13. The device as claimed in claim 1, wherein said substrate is optically degradable.

14. The device as claimed in claim 1, wherein said substrate is degradable.

15. The device as claimed in claim 1, wherein said conductive traces are expandable.

16. The device as claimed in claim 1, wherein said conductive traces are expandable without damage thereto.

17. The device as claimed in claim 1, wherein said conductive traces form a pattern.

18. The device as claimed in claim 16, wherein said pattern of conductive traces is expandable.

19. The device as claimed in claim 16, wherein said pattern of conductive traces is expandable without damage thereto.

20. The device as claimed in claim 1, wherein said conductive traces form a plurality of coils, each coil forming an inductive-capacitance circuit, said inductive-capacitance circuit being tuned to a distinct frequency.

21. The device as claimed in claim 1, wherein said conductive traces form a plurality of coils, each coil forming a resistive-inductive-capacitance circuit, said resistive-inductive-capacitance circuit being tuned to a distinct frequency.

22. The device as claimed in claim 1, wherein said conductive traces form a stack of coils, said stack of coils having an axis normal to a surface of said substrate.

23. The device as claimed in claim 1, wherein said conductive traces form a plurality of stacked coils, each stacked coil having an axis normal to a surface of said substrate, each stacked coil forming an inductive-capacitance circuit, said inductive-capacitance circuit.

24. The device as claimed in claim 1, wherein said conductive traces form a plurality of stacked coils, each stacked coil having an axis normal to a surface of said substrate, each stacked coil forming a resistive-inductive-capacitance circuit, said resistive-inductive-capacitance circuit.

25. The device as claimed in claim 1, wherein said conductive traces form a plurality of multi-loop coils, each multi-loop coil having an axis normal to a surface of said substrate, each multi-loop coil forming an inductive-capacitance circuit, said inductive-capacitance circuit.

26. The device as claimed in claim 1, wherein said conductive traces form a plurality of multi-loop coils, each multi-loop coil having an axis normal to a surface of said substrate, each multi-loop coil forming a resistive-inductive-capacitance circuit, said resistive-inductive-capacitance circuit.