Low-profile implantable medical device

• US 8,457,744 B2
• Filed: 12/09/2003
• Issued: 06/04/2013
• Est. Priority Date: 12/09/2002
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Janzig, Darren A., Wahlstrand, Carl D., Olson, Paulette C., Skime, Robert M.
• Primary Examiner(s): Patel, Niketa
• Assistant Examiner(s): ALTER MORSCHAUSER, ALYSSA MARGO
• Application Number:
  US10/730,877
• Publication Number:
  US 20040176815A1
• Time in Patent Office: 3,465 Days
• Field of Search: 607/45, 607/46, 607/62, 607/36, 623/10, 437/874, 600/476
• US Class Current: 607/36
• CPC Class Codes: A61N 1/3605 Implantable neurostimulators for stimulating central or peripheral nerve system
• CPC Class Codes: A61N 1/37514 Brain implants
• CPC Class Codes: A61N 1/37518 Anchoring of the implants, e.g. fixation
• CPC Class Codes: A61N 1/3754 Feedthroughs
• CPC Class Codes: A61N 1/3758 Packaging of the components within the casing

Abstract

Components of an implantable medical device are arranged to facilitate a low-profile housing. A circuit board within the housing carries integrated circuits and discrete components. In some embodiments, the integrated circuits and discrete components are located on first and second opposing surfaces of the circuit board, respectively. In some embodiments, the implantable medical device is implanted on a cranium of a patient and the housing is concave such that it substantially conforms to the cranium. In such embodiments, the integrated circuits and/or discrete components can be arranged on the circuit board according to height to better conform to the concavity of the housing. In some embodiments, the implantable medical device includes a telemetry coil that is positioned within the housing such that it occupies space that cannot be practically occupied by the circuit board.

Claims

1. An implantable medical device comprising:

a plurality of integrated circuits;

a plurality of discrete components;

a circuit board that is coupled to each of the integrated circuits and discrete components;

and a housing to house the circuit board,

wherein the circuit board comprises first and second opposing surfaces, the housing houses the first and second surfaces, each of the integrated circuits is located on the first surface, and each of the discrete circuit components is located on the second surface,

wherein at least one of the integrated circuits or discrete components are arranged on the respective one of the first or second surfaces to substantially conform to a first predetermined non-linear profile that is based on a second non-linear profile of the housing, and

wherein each of the discrete components has a height, and the discrete components are arranged on the second surface of the circuit board such that the heights of the discrete components predominantly decrease from an edge of the second surface of the circuit board to a center of the second surface of the circuit board.

6. The implantable medical device of claim 1, wherein the implantable medical device is configured such that when the implantable medical device is implanted on the cranium such that the first surface is oriented away from a cranium of a patient, the second surface is oriented toward the cranium.

12. The implantable medical device of claim 1, wherein the first predetermined non-linear profile comprises the second profile of the housing.

13. The implantable medical device of claim 1, wherein a thickness of the circuit board including the integrated circuits and the discrete components is less than or equal to 3.8 millimeters.

14. The implantable medical device of claim 1, wherein a radial thickness of the housing is less than or equal to 5.2 millimeters.

15. The implantable medical device of claim 1, wherein the circuit board is substantially concave along at least one axis.

16. The implantable medical device of claim 15, wherein the circuit board comprises flex tape.

17. The implantable medical device of claim 1, wherein the housing comprises a feedthrough on a side surface that is oriented at a non-parallel, non-perpendicular angle relative to a major surface of the housing.

18. The implantable medical device of claim 17, wherein the angle is approximately equal to 45 degrees.

19. The implantable medical device of claim 17, wherein the feedthrough is oriented substantially along a radius of the housing.

20. The implantable medical device of claim 1, wherein the housing comprises a first housing, the implantable medical device further comprising a second housing that houses a power source that provides power to the integrated circuits and the discrete components.

21. The implantable medical device of claim 1, wherein implantable medical device comprises an implantable neurostimulator.

22. The implantable medical device of claim 21, wherein the implantable medical device is adapted to deliver stimulation to a brain of a patient.

23. The implantable medical device of claim 1, wherein the second non-linear profile of the housing is substantially concave along at least one axis.

2. An implantable medical device comprising:

a plurality of integrated circuits;

a plurality of discrete components;

a circuit board that is coupled to each of the integrated circuits and discrete components; and

a housing to house the circuit board,

wherein the circuit board comprises first and second opposing surfaces, the housing houses the first and second surfaces, each of the integrated circuits is located on the first surface, and each of the discrete circuit components is located on the second surface,

wherein at least one of the integrated circuits or discrete components are arranged on the respective one of the first or second surfaces to substantially conform to a first predetermined non-linear profile that is based on a second non-linear profile of the housing, and

wherein a thickness of the circuit board including the integrated circuits and the discrete components is less than or equal to 3.8 millimeters.

24. The implantable medical device of claim 2, further comprising a telemetry coil within the housing that encircles the circuit board.

26. The implantable medical device of claim 24, wherein the circuit board is located substantially within a first plane and the telemetry coil is located substantially within a second plane, and the first and second planes are substantially parallel.

27. The implantable medical device of claim 24, wherein the housing includes a central portion and a taper portion, the circuit board is located within the central portion, and the telemetry coil is located within the taper portion.

28. The implantable medical device of claim 2, wherein the first predetermined non-linear profile comprises the second profile of the housing.

29. The implantable medical device of claim 2, wherein each of the integrated circuits has a height, and the integrated circuits are arranged on the first surface of the circuit board such that the heights of the integrated circuits predominantly increase from an edge of the first surface of the circuit board to a center of the first surface of the hybrid circuit board.

30. The implantable medical device of claim 2, wherein a radial thickness of the housing is less than or equal to 5.2 millimeters.

31. The implantable medical device of claim 2, wherein the circuit board is substantially concave along at least one axis.

32. The implantable medical device of claim 2, wherein the housing comprises a feedthrough on a side surface that is oriented at a non-parallel, non-perpendicular angle relative to a major surface of the housing.

33. The implantable medical device of claim 2, wherein the housing comprises a first housing, the implantable medical device further comprising a second housing that houses a power source that provides power to the integrated circuits and the discrete components.

34. The implantable medical device of claim 2, wherein implantable medical device comprises an implantable neurostimulator.

35. The implantable medical device of claim 2, wherein the second non-linear profile of the housing is substantially concave along at least one axis.

3. An implantable medical device comprising:

a plurality of integrated circuits;

a plurality of discrete components;

a circuit board that is coupled to each of the integrated circuits and discrete components; and

a housing to house the circuit board,

wherein the circuit board comprises first and second opposing surfaces, the housing houses the first and second surfaces, each of the integrated circuits is located on the first surface, and each of the discrete circuit components is located on the second surface,

wherein at least one of the integrated circuits or discrete components are arranged on the respective one of the first or second surfaces to substantially conform to a first predetermined non-linear profile that is based on a second non-linear profile of the housing, and

wherein a radial thickness of the housing is less than or equal to 5.2 millimeters.

36. The implantable medical device of claim 3, further comprising a telemetry coil within the housing that encircles the circuit board.

38. The implantable medical device of claim 36, wherein the circuit board is located substantially within a first plane and the telemetry coil is located substantially within a second plane, and the first and second planes are substantially parallel.

39. The implantable medical device of claim 36, wherein the housing includes a central portion and a taper portion, the circuit board is located within the central portion, and the telemetry coil is located within the taper portion.

40. The implantable medical device of claim 3, wherein the first predetermined non-linear profile comprises the second profile of the housing.

41. The implantable medical device of claim 3, wherein each of the integrated circuits has a height, and the integrated circuits are arranged on the first surface of the circuit board such that the heights of the integrated circuits predominantly increase from an edge of the first surface of the circuit board to a center of the first surface of the hybrid circuit board.

42. The implantable medical device of claim 3, wherein the circuit board is substantially concave along at least one axis.

43. The implantable medical device of claim 3, wherein the housing comprises a feedthrough on a side surface that is oriented at a non-parallel, non-perpendicular angle relative to a major surface of the housing

44. The implantable medical device of claim 3, wherein the housing comprises a first housing, the implantable medical device further comprising a second housing that houses a power source that provides power to the integrated circuits and the discrete components.

45. The implantable medical device of claim 3, wherein implantable medical device comprises an implantable neurostimulator.

46. The implantable medical device of claim 3, wherein the second non-linear profile of the housing is substantially concave along at least one axis.

4. An implantable medical device comprising:

a circuit board;

a telemetry coil that encircles the circuit board;

a housing to house the circuit board and the telemetry coil, wherein the circuit board is located substantially within a first plane and the telemetry coil is located substantially within a second plane that is different than the first plane, the first and second planes are substantially parallel, and the telemetry coil is substantially uneclipsed by the circuit board in a direction substantially perpendicular to at least one of the first or second planes;

a plurality of integrated circuits; and

a plurality of discrete components, wherein the integrated circuits and discrete components are coupled to the circuit board, and a thickness of the circuit board including the integrated circuits and discrete components is less than or equal to 3.8 millimeters.

47. The implantable medical device of claim 4, wherein the housing comprises a substantially concave portion and is configured to be implanted on a surface of a cranium of a patient such that the second plane is located closer to the surface of the cranium of the patient than the first plane when the medical device is implanted on the cranium such that the substantially concave portion of the housing substantially conforms to the surface of the cranium.

48. The implantable medical device of claim 4, wherein the housing is substantially concave in two axes and includes a central portion and a taper portion, the circuit board is located within the central portion, and the telemetry coil is located within the taper portion.

49. The implantable medical device of claim 4, wherein a radial thickness of the housing is less than or equal to 5.2 millimeters.

50. The implantable medical device of claim 4, wherein the circuit board is substantially concave along at least one axis.

51. The implantable medical device of claim 4, wherein the circuit board comprises flex tape.

52. The implantable medical device of claim 4, wherein the housing comprises a first housing, the implantable medical device further comprising a second housing that houses a power source that provides power to the circuit board.

53. The implantable medical device of claim 4, wherein implantable medical device comprises an implantable neurostimulator.

54. The implantable medical device of claim 53, wherein the implantable medical device is adapted to deliver stimulation to a brain of a patient.

5. An implantable medical device comprising:

a circuit board;

a telemetry coil that encircles the circuit board; and

and a housing to house the circuit board and the telemetry coil,

wherein the circuit board is located substantially within a first plane and the telemetry coil is located substantially within a second plane that is different than the first plane, the first and second planes are substantially parallel, and the telemetry coil is substantially uneclipsed by the circuit board in a direction substantially perpendicular to at least one of the first or second planes, and

wherein a radial thickness of the housing is less than or equal to 5.2 millimeters.

55. The implantable medical device of claim 5, wherein the housing comprises a substantially concave portion and is configured to be implanted on a surface of a cranium of a patient such that the second plane is located closer to the surface of the cranium of the patient than the first plane when the medical device is implanted on the cranium such that the substantially concave portion of the housing substantially conforms to the surface of the cranium.

56. The implantable medical device of claim 55, wherein the housing is substantially concave in two axes and includes a central portion and a taper portion, the circuit board is located within the central portion, and the telemetry coil is located within the taper portion.

57. The implantable medical device of claim 5, wherein the circuit board is substantially concave along at least one axis.

58. The implantable medical device of claim 5, wherein the circuit board comprises flex tape.

59. The implantable medical device of claim 5, wherein the housing comprises a first housing, the implantable medical device further comprising a second housing that houses a power source that provides power to the circuit board.

60. The implantable medical device of claim 5, wherein implantable medical device comprises an implantable neurostimulator.

7. The implantable medical device 1, further comprising a telemetry coil within the housing that encircles the circuit board.

9. The implantable medical device of claim 7, wherein the circuit board is located substantially within a first plane and the telemetry coil is located substantially within a second plane, and the first and second planes are substantially parallel.

10. The implantable medical device of claim 9, wherein the housing is configured to be implanted on a surface of a cranium of a patient such that the second plane is located closer to the surface of the cranium of the patient than the first plane when the implantable medical device is implanted on the cranium such that the second surface of the circuit board is oriented closer to the cranium than the first surface.

11. The implantable medical device of claim 7, wherein the housing includes a central portion and a taper portion, the circuit board is located within the central portion, and the telemetry coil is located within the taper portion.

8. The implantable medical device 7, wherein the telemetry coil is substantially uneclipsed by the circuit board.

25. The implantable medical device 24, wherein the telemetry coil is substantially uneclipsed by the circuit board.

37. The implantable medical device 36, wherein the telemetry coil is substantially uneclipsed by the circuit board.