Medical device with an electrically conductive anti-antenna geometrical shaped member

• US 20050090886A1
• Filed: 10/22/2004
• Published: 04/28/2005
• Est. Priority Date: 02/20/2001
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Biophan Technologies Incorporated
• Inventors: MacDonald, Stuart G., Connelly, Patrick R.
• Granted Patent: US 7,450,996 B2
• Time in Patent Office: Days
• US Class Current: 607/122
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: A61N 1/086 Magnetic resonance imaging [MRI] compatible leads
• CPC Class Codes: A61N 1/16 Screening or neutralising undesirable influences from or using, atmospheric or terrestrial radiation or fields using atmospheric electricity or earth currents H05F3/00
• CPC Class Codes: A61N 1/3718 Monitoring of or protection against external electromagnetic fields or currents
• CPC Class Codes: A61N 1/37512 Pacemakers
• CPC Class Codes: A61N 1/37518 Anchoring of the implants, e.g. fixation
• CPC Class Codes: H01R 13/5224 for medical use
• CPC Class Codes: H01R 13/6464 by adding capacitive elements
• CPC Class Codes: H01R 13/6598 Shield material
• CPC Class Codes: H01R 13/719 specially adapted for high frequency, e.g. with filters
• CPC Class Codes: H01R 2201/12 for medicine and surgery

Abstract

A medical device having electrically conductive properties includes an electrically conductive member. The electrically conductive member has an anti-antenna geometrical shape. The anti-antenna geometrical shaped electrically conductive member is shaped such that currents induced in the anti-antenna geometrical shaped electrically conductive member, by radio frequency fields, offset currents induced in the medical device by the radio frequency fields.

Claims

1. A transducer system to transmit and receive signals between a selected tissue region and a tissue invasive device, comprising:

an electrical lead; and

an electrode located on an end of said electrical lead having an anti-antenna geometrical shape, said anti-antenna geometrical shape electrode being shaped such that currents induced in said electrode, by magnetic resonance imaging, produce a net current having a zero magnitude.

2. The transducer system as claimed in claim 1, wherein said electrode includes a hollow porous cylinder for attaching said electrode to the selected tissue region.

3. A cardiac assist transducer system to transmit and receive signals between a cardiac tissue region and a cardiac assist device, comprising:

an electrical lead to deliver electrical pulses to the cardiac tissue region; and

an electrode located on an end of said electrical lead having an anti-antenna geometrical shape, said anti-antenna geometrical shape electrode being shaped such that currents induced in said electrode, by magnetic resonance imaging, produce a net current having a zero magnitude.

4. A medical lead, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by magnetic resonance imaging, produce a net current having a zero magnitude.

5. A medical intervention tool having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by magnetic resonance imaging, produce a net current having a zero magnitude.

6. An implantable medical electrode, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by magnetic resonance imaging, produce a net current having a zero magnitude.

7. A medical device, comprising:

a lead; and

an electrically conductive member having an anti-antenna geometrical shape connected to said lead;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by magnetic resonance imaging, produce a net current having a zero magnitude.

8. A medical device, comprising:

a metal component placed in a tissue region and having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped metal component being shaped such that currents induced in said anti-antenna geometrical shaped metal component, by magnetic resonance imaging, produce a net current having a zero magnitude.

9. A medical device, comprising:

an electrically conductive component placed in a tissue region and having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by magnetic resonance imaging, produce a net current having a zero magnitude.

10. A transducer system to transmit and receive signals between a selected tissue region and a tissue invasive device, comprising:

an electrical lead; and

an electrode located on an end of said electrical lead having an anti-antenna geometrical shape, said anti-antenna geometrical shape electrode being shaped such that currents induced in said electrode, by changing eternal magnetic fields, produce a net current having a zero magnitude.

11. A cardiac assist transducer system to transmit and receive signals between a cardiac tissue region and a cardiac assist device, comprising:

an electrical lead to deliver electrical pulses to the cardiac tissue region; and

an electrode located on an end of said electrical lead having an anti-antenna geometrical shape, said anti-antenna geometrical shape electrode being shaped such that currents induced in said electrode, by changing eternal magnetic fields, produce a net current having a zero magnitude.

12. A medical lead, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, produce a net current having a zero magnitude.

13. A medical intervention tool having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, produce a net current having a zero magnitude.

14. An implantable medical electrode, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, produce a net current having a zero magnitude.

15. A medical device, comprising:

a lead; and

an electrically conductive member having an anti-antenna geometrical shape connected to said lead;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, produce a net current having a zero magnitude.

16. A medical device, comprising:

a metal component placed in a tissue region and having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped metal component being shaped such that currents induced in said anti-antenna geometrical shaped metal component, by changing eternal magnetic fields, produce a net current having a zero magnitude.

17. A medical device, comprising:

an electrically conductive component placed in a tissue region and having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, produce a net current having a zero magnitude.

18. A medical intervention tool having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, prevent the medical intervention tool from conducting currents induced by the changing eternal magnetic fields.

19. A medical lead having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, prevent the medical lead from conducting currents induced by the changing eternal magnetic fields.

20. A medical device having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, prevent the medical device from conducting currents induced by the changing eternal magnetic fields.

21. A medical intervention tool having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, passively neutralize currents induced in the medical intervention tool by the changing eternal magnetic fields.

22. A medical lead having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, passively neutralize currents induced in the medical lead by the changing eternal magnetic fields.

23. A medical device having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, passively neutralize currents induced in the medical device by the changing eternal magnetic fields.

24. A transducer system to transmit and receive signals between a selected tissue region and a medical intervention tool, comprising:

an electrical lead; and

an electrode located on an end of said electrical lead having an anti-antenna geometrical shape, said anti-antenna geometrical shape electrode being shaped such that currents induced in said electrode, by magnetic resonance imaging, produce a net current having a zero magnitude.

25. A transducer system to transmit and receive signals between a selected tissue region and an implantable medical device, comprising:

an electrical lead; and

an electrode located on an end of said electrical lead having an anti-antenna geometrical shape, said anti-antenna geometrical shape electrode being shaped such that currents induced in said electrode, by magnetic resonance imaging, produce a net current having a zero magnitude.

26. A transducer system to transmit and receive signals between a selected tissue region and a tissue invasive device, comprising:

an electrical lead; and

an electrode located on an end of said electrical lead having an anti-antenna geometrical shape, said anti-antenna geometrical shape electrode being shaped such that currents induced in said electrode, by electromagnetic radiation, produce a net current having a zero magnitude.

27. A cardiac assist transducer system to transmit and receive signals between a cardiac tissue region and a cardiac assist device, comprising:

an electrical lead to deliver electrical pulses to the cardiac tissue region; and

an electrode located on an end of said electrical lead having an anti-antenna geometrical shape, said anti-antenna geometrical shape electrode being shaped such that currents induced in said electrode, by electromagnetic radiation, produce a net current having a zero magnitude.

28. A medical lead, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by electromagnetic radiation, produce a net current having a zero magnitude.

29. A medical intervention tool having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by electromagnetic radiation, produce a net current having a zero magnitude.

30. An implantable medical electrode, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by electromagnetic radiation, produce a net current having a zero magnitude.

31. A medical device, comprising:

a lead; and

an electrically conductive member having an anti-antenna geometrical shape connected to said lead;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by electromagnetic radiation, produce a net current having a zero magnitude.

32. A medical device, comprising:

a metal component placed in a tissue region and having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped metal component being shaped such that currents induced in said anti-antenna geometrical shaped metal component, by electromagnetic radiation, produce a net current having a zero magnitude.

33. A medical device, comprising:

an electrically conductive component placed in a tissue region and having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by electromagnetic radiation, produce a net current having a zero magnitude.

34. A medical intervention tool having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by electromagnetic radiation, prevent the medical intervention tool from conducting currents induced by the electromagnetic radiation.

35. A medical lead having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by electromagnetic radiation, prevent the medical lead from conducting currents induced by the electromagnetic radiation.

36. A medical device having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by electromagnetic radiation, prevent the medical device from conducting currents induced by the electromagnetic radiation.

37. A medical intervention tool having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by electromagnetic radiation, passively neutralize currents induced in the medical intervention tool by the electromagnetic radiation.

38. A medical lead having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by electromagnetic radiation, passively neutralize currents induced in the medical lead by the electromagnetic radiation.

39. A medical device having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by electromagnetic radiation, passively neutralize currents induced in the medical device by the electromagnetic radiation.

40. A transducer system to transmit and receive signals between a selected tissue region and a medical intervention tool, comprising:

an electrical lead; and

an electrode located on an end of said electrical lead having an anti-antenna geometrical shape, said anti-antenna geometrical shape electrode being shaped such that currents induced in said electrode, by electromagnetic radiation, produce a net current having a zero magnitude.

41. A transducer system to transmit and receive signals between a selected tissue region and an implantable medical device, comprising:

an electrical lead; and

an electrode located on an end of said electrical lead having an anti-antenna geometrical shape, said anti-antenna geometrical shape electrode being shaped such that currents induced in said electrode, by electromagnetic radiation, produce a net current having a zero magnitude.

42. A medical intervention tool having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, offset currents induced in the medical intervention tool by the changing eternal magnetic fields.

43. A medical lead having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, offset currents induced in the medical lead by the changing eternal magnetic fields.

44. A medical device having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by changing eternal magnetic fields, offset currents induced in the medical device by the changing eternal magnetic fields.

45. A medical intervention tool having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by radio frequency fields, offset currents induced in the medical intervention tool by the radio frequency fields.

46. A medical lead having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by radio frequency fields, offset currents induced in the medical lead by the radio frequency fields.

47. A medical device having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by radio frequency fields, offset currents induced in the medical device by the radio frequency fields.

48. A medical intervention tool having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by radio frequency fields, prevent the medical intervention tool from conducting currents induced by the radio frequency fields.

49. A medical lead having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by radio frequency fields, prevent the medical lead from conducting currents induced by the radio frequency fields.

50. A medical device having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by radio frequency fields, prevent the medical device from conducting currents induced by the radio frequency fields.

51. A medical intervention tool having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by radio frequency fields, passively neutralize currents induced in the medical intervention tool by the radio frequency fields.

52. A medical lead having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by radio frequency fields, passively neutralize currents induced in the medical lead by the radio frequency fields.

53. A medical device having electrically conductive properties, comprising:

an electrically conductive member having an anti-antenna geometrical shape;

said anti-antenna geometrical shaped electrically conductive member being shaped such that currents induced in said anti-antenna geometrical shaped electrically conductive member, by radio frequency fields, passively neutralize currents induced in the medical device by the radio frequency fields.