Resonator for medical device

• US 20060287705A1
• Filed: 05/24/2005
• Published: 12/21/2006
• Est. Priority Date: 05/24/2005
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Weber, Jan
• Granted Patent: US 7,595,469 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• CPC Class Codes: A61B 2090/3954 magnetic, e.g. NMR or MRI
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: G01R 33/288 Provisions within MR facilities for enhancing safety during MR, e.g. reduction of the specific absorption rate [SAR], detection of ferromagnetic objects in the scanner room

Abstract

A device resonator 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 system for implanting in a body, comprising:

a first resonator device including a first induction coil with at least one turn; and

a stent having a first end and a second end, where at least one turn of the first induction coil extends beyond the first end away from the second end of the stent.

2. The system of claim 1, including a second resonator device that includes a second induction coil with at least one turn, where at least one turn of the second induction coil extends from the second end away from the first end of the stent.

3. The system of claim 2, including a connection member that separates and couples the first resonator device and the second resonator device.

4. The system of claim 3, where the connection member separates and couples the first resonator device and the second resonator device through the stent.

5. The system of claim 4, where the connection member extends through a lumen of the stent.

6. The system of claim 4, where the connection member couples the first resonator device to the first end of the stent and the second resonator device to the second end of the stent.

7. The system of claim 3, where the connection member extends past an exterior surface of the stent.

8. The system of claim 2, where the first resonator device includes a first capacitor in series with the first induction coil, and the second resonator device includes a second capacitor in series with the second induction coil.

9. The system of claim 8, where the first resonator device includes a first resistor in series with the first capacitor and first induction coil, and the second resonator device includes a second resistor in series with the second capacitor and second induction coil.

10. The system of claim 2, where the first induction coil and the second induction coil are coupled in series through a connection member and a first capacitor.

11. The system of claim 10, where the first induction coil and the second induction coil are coupled in series through the connection member, the first capacitor, and a resistor.

12. The system of claim 10, where the first induction coil and the second induction coil are coupled in series through the connection member, the first capacitor, and the stent.

13. The system of claim 12, where the first induction coil and the second induction coil are coupled in series through the connection member, the first capacitor, the stent, and a resistor.

14. The system of claim 2, where at least a portion of the first induction coil is positioned over a first portion of the stent and at least a portion of the second induction coil is positioned over a second portion of the stent.

15. The system of claim 2, wherein the first and second resonator devices are electrically isolated from the stent.

16. The system of claim 1, where at least a portion of the first induction coil is positioned over a first portion of the stent.

17. The system of claim 1, where the first resonator device includes a second induction coil coupled in series with the first induction coil and a capacitor, where the second induction coil extends beyond the second end away from the first end of the stent.

18. The system of claim 17, wherein the first resonator device is electrically isolated from the stent.

19. A system for implanting in a body, comprising:

a first resonator device;

a second resonator device physically and electrically separated from the first resonator device; and

a stent having a first end and a second end, where the first resonator device is adjacent the first end of the stent and the second resonator device is adjacent the second end of the stent.

20. The system of claim 19, where the first resonator and the second resonator are physically and electrically isolated from the stent.

21. The system of claim 20, including a connection member that separates and couples the first resonator device and the second resonator device through the stent.

22. The system of claim 21, where the connection member extends through a lumen of the stent.

23. The system of claim 21, where the connection member extends past an exterior surface of the stent.

24. The system of claim 19, where the first resonator device includes a first resistor in series with a first capacitor and a first induction coil, and the second resonator device includes a second resistor in series with a second capacitor and a second induction coil.

25. The system of claim 19, where the first resonator device includes a first induction coil and the stent and the first induction coil are formed from a contiguous electrically conductive body.

26. A method, comprising:

implanting a first resonator device and a stent;

measuring the frequency response of the first resonator device and the stent;

modifying a second resonator device based on the measured frequency response of the first resonator device and the stent; and

implanting the second resonator device in proximity to the first resonator device and the stent.

27. The method of claim 26, where modifying the second resonator device includes changing a capacitance value of the second resonator device.

28. The method of claim 26, where modifying the second resonator device includes modifying an induction coil of the second resonator device.

29. The method of claim 26, where modifying the second resonator device includes modifying a resistor in the second resonator device.

30. The method of claim 26, including producing a resonant radio frequency field with the first resonator device and the second resonator device.

31. The method of claim 30, including focusing the resonant radio frequency field through a lumen of the stent.

32. The method of claim 31, including deriving images from within the lumen of the stent based on the resonant radio frequency field focused through the lumen of the stent.