SIMPLIFIED IMPLANTABLE HEARING AID TRANSDUCER APPARATUS

• US 20080051623A1
• Filed: 09/24/2007
• Published: 02/28/2008
• Est. Priority Date: 01/27/2003
• Status: Active Grant

• Current Assignee: Cochlear Limited
• Original Assignee: Cochlear Limited
• Inventors: Miller, Scott, Schneider, Robert, Andrews, Travis
• Granted Patent: US 8,366,601 B2
• Time in Patent Office: Days
• US Class Current: 600/25
• CPC Class Codes: H04R 2225/67 Implantable hearing aids or parts thereof not covered by H04R25/606
• CPC Class Codes: H04R 25/606 acting directly on the eardrum, the ossicles or the skull, e.g. mastoid, tooth, maxillary or mandibular bone, or mechanically stimulating the cochlea, e.g. at the oval window

Abstract

An implantable hearing aid transducer apparatus provides a simplified approach for interface with a middle ear component. The transducer includes a transducer housing, an actuator for middle ear coupling, and a driver having a magnet or coil interconnected to the actuator to induce movement in response to driver signals. In one feature, the actuator may be advanceable through an aperture of the housing independent from operation of the driver. In another feature, a portion of the transducer may be rotatable. In another feature, a retention apparatus may function to selectively secure a rotatable portion of the housing in a selected position. In an additional feature, a seal may be disposed around a driver component and connected to the actuator.

Claims

1. An implantable hearing aid transducer mountable to a transducer mounting apparatus, the transducer comprising:

a transducer housing having an aperture extending through a first side thereof, and a rotatable portion, wherein the rotatable portion of the transducer housing is rotatable relative to a transducer mounting apparatus, and wherein during rotation a center of rotation of the rotatable portion of the transducer housing remains positionally fixed;

an actuator advanceable relative to the transducer housing through the aperture to couple with a middle ear component;

a driver comprising at least one magnet and at least one coil, wherein one of the at least one magnet and at least one coil is connected to the actuator to induce movement of the actuator relative to the transducer housing in response to transducer drive signals, and wherein the actuator is advanceable through the aperture independent from operation of the driven; and

a seal disposed around the one of the at least one magnet and the at least one coil connected to the actuator to protect the one of the at least one magnet and the at least one coil from body fluids.

2. An implantable hearing aid transducer as recited in claim 1, wherein the rotatable portion of the transducer housing is rotatable to align one of an actuator axis and the aperture with a desired interface point on a middle ear component.

3. An implantable hearing aid transducer as recited in claim 1, wherein the actuator is a separate structure from the transducer housing that is insertable into and advanceable though the aperture.

4. An implantable hearing aid transducer as recited in claim 3, wherein the aperture extends through a second side of the transducer housing.

5. An implantable hearing aid transducer as recited in claim 1, further comprising:

a tube connected to the one of the at least one magnet and one coil, wherein the tube is connectable to the actuator subsequent to the transducer housing being implanted in the patient to connect the one of the at least one magnet and one coil to the actuator.

6. An implantable hearing aid transducer as recited in claim 5, further comprising:

connecting means for movably connecting the tube within said aperture, wherein said connecting means permits the one of the at least one magnet and one coil to induce movement of the tube within the aperture relative to the transducer housing.

7. An implantable hearing aid transducer as recited in claim 6, wherein the connecting means permits axial movement of the tube while restricting lateral movement of the tube relative to the transducer housing.

12. An implantable hearing aid transducer as recited in claim 6, wherein the connecting means comprises:

a compliant member physically interposed between at least a portion of the tube and a wall of the transducer housing defining the aperture.

14. An implantable hearing aid transducer as recited in claim 12, wherein at least a portion of the compliant member defines at least a portion of said seal.

8. (canceled)

9. (canceled)

10. (canceled)

11. (canceled)

13. (canceled)

15. An implantable hearing aid transducer mountable to a transducer mounting apparatus, the transducer comprising:

a transducer housing having an aperture extending through a first side thereof, and a rotatable portion, wherein the rotatable portion of the transducer housing is rotatable relative to a transducer mounting apparatus, and wherein during rotation a center of rotation of the rotatable portion of the transducer housing remains positionally fixed;

a retention apparatus to selectively secure the rotatable portion of the transducer housing relative to the mounting apparatus;

an actuator advanceable relative to the transducer housing through the aperture to couple with a middle ear component;

a driver comprising at least one magnet and at least one coil, wherein one of the at least one magnet and at least one coil is connected to the actuator to induce movement of the actuator relative to the transducer housing in response to transducer drive signals, and wherein the actuator is advanceable through the aperture independent from operation of the driven; and

a seal disposed around the one of the at least one magnet and the at least one coil connected to the actuator to protect the one of the at least one magnet and the at least one coil from body fluids.

16. An implantable hearing aid transducer as recited in claim 15, wherein said retention apparatus comprises:

a retaining member;

at least one guide on the retaining member movable along a predetermined path of travel in a transducer mounting apparatus between an unlocked and a locked position; and

a resilient member compressible between the retaining member and the rotatable portion of the transducer housing to capture the rotatable portion in a desired angular orientation relative to an auditory component when the retention apparatus is in the locked position.

17. An implantable hearing aid transducer as recited in claim 16, wherein the retention apparatus further comprises:

a pair of diametrically opposed guides engageable with a channel defined in the mounting apparatus and movable within the channel to compress the resilient member between the retaining member and the rotatable portion of the transducer housing.

18. An implantable hearing aid transducer as recited in claim 17, wherein the retaining member and the resilient member are interconnected as a single unit.

19. An implantable hearing aid transducer as recited in claim 17, wherein the retention apparatus is receivable in a cavity of the mounting apparatus.

20. An implantable hearing aid transducer as recited in claim 19, wherein when the retention apparatus is in the locked position the rotatable portion of the transducer housing is rotatable within the cavity when a predetermined amount of force is applied.

21. An implantable hearing aid transducer as recited in claim 17, wherein the retention apparatus further comprises:

a pair of detents engageable with a feature of the channel to lock the resilient member in a compressed state.

22. An implantable hearing aid transducer as recited in claim 15, wherein the rotatable portion of the transducer housing is rotatable within the cavity to align one of an aperture in the transducer housing and an actuator axis with a desired interface point on an auditory member.

23. An implantable hearing aid transducer as recited in claim 15, wherein the rotatable portion of the transducer housing is rounded for rotation relative to the mounting apparatus.

24. An implantable hearing aid transducer as recited in claim 15, wherein the retention apparatus is selectively movable between a locked and unlocked position.

25. An implantable hearing aid transducer as recited in claim 24, wherein the rotatable portion of the transducer housing is rotatable, upon application of a predetermined amount of force, relative to the mounting apparatus, when the retention apparatus is in the locked position.

29. An implantable hearing aid transducer as recited in claim 20, wherein the aperture extends through a second side of the transducer body.

26. An implantable hearing aid transducer mountable to a transducer mounting apparatus, the transducer comprising:

a transducer body having an aperture extending through a first side thereof;

an actuator advanceable relative to the transducer housing through the aperture to couple with a middle ear component;

a driver comprising at least one magnet and at least one coil, wherein one of the at least one magnet and at least one coil is connected to the actuator to induce movement of the actuator relative to the transducer housing in response to transducer drive signals, and wherein the actuator is advanceable through the aperture independent from operation of the driven; and

a seal disposed around the one of the at least one magnet and the at least one coil connected to the actuator to protect the one of the at least one magnet and the at least one coil from body fluids.

27. An implantable hearing aid transducer as recited in claim 26, wherein the transducer body is positionable relative to a transducer mounting apparatus to align one of an actuator axis and the aperture with a desired interface point on a middle ear component.

28. An implantable hearing aid transducer as recited in claim 26, wherein the actuator is a separate structure from the transducer body that is insertable into and advanceable though the aperture.

30. An implantable hearing aid transducer as recited in claim 26, further comprising:

a tube connected to the one of the at least one magnet and one coil, wherein the tube is connectable to the actuator subsequent to the transducer body being implanted in the patient to connect the one of the at least one magnet and one coil to the actuator.

31. An implantable hearing aid transducer as recited in claim 30, further comprising:

connecting means for movably connecting the tube within said aperture, wherein said connecting means permits the one of the at least one magnet and one coil to induce movement of the tube within the aperture relative to the transducer body.

32. An implantable hearing aid transducer as recited in claim 31, wherein the connecting means permits axial movement of the tube while restricting lateral movement of the tube relative to the transducer body.

37. An implantable hearing aid transducer as recited in claim 31, wherein the connecting means comprises:

a compliant member physically interposed between at least a portion of the tube and a wall of the transducer body defining the aperture.

39. An implantable hearing aid transducer as recited in claim 37, wherein at least a portion of the compliant member defines at least a portion of said seal.

33. (canceled)

34. (canceled)

35. (canceled)

36. (canceled)

38. (canceled)

40. An implantable hearing aid transducer mountable to a transducer mounting apparatus, the transducer comprising:

a transducer housing having an aperture extending through a first side thereof, and a rotatable portion, wherein the rotatable portion of the transducer housing is rotatable relative to a transducer mounting apparatus, and wherein during rotation a center of rotation of the rotatable portion of the transducer housing remains positionally fixed;

a retention apparatus to selectively secure the rotatable portion of the transducer housing relative to the mounting apparatus;

an actuator advanceable relative to the transducer housing through the aperture to couple with a middle ear component; and

a driver comprising at least one magnet and at least one coil, wherein one of the at least one magnet and at least one coil is connected to the actuator to induce movement of the actuator relative to the transducer housing in response to transducer drive signals, and wherein the actuator is advanceable through the aperture independent from operation of the driven.

41. An implantable hearing aid transducer as recited in claim 40, wherein the rotatable portion of the transducer housing is rotatable to align one of an actuator axis and the aperture with a desired interface point on a middle ear component.

42. An implantable hearing aid transducer as recited in claim 40, wherein the actuator is a separate structure from the transducer housing that is insertable into and advanceable though the aperture.

43. An implantable hearing aid transducer as recited in claim 42, wherein the aperture extends through a second side of the transducer housing.

44. An implantable hearing aid transducer as recited in claim 40, further comprising:

a tube connected to the one of the at least one magnet and one coil, wherein the tube is connectable to the actuator subsequent to the transducer housing being implanted in the patient to connect the one of the at least one magnet and one coil to the actuator.

45. An implantable hearing aid transducer as recited in claim 44, further comprising:

connecting means for movably connecting the tube within said aperture, wherein said connecting means permits the one of the at least one magnet and one coil to induce movement of the tube within the aperture relative to the transducer housing.

46. An implantable hearing aid transducer as recited in claim 45, wherein the connecting means permits axial movement of the tube while restricting lateral movement of the tube relative to the transducer housing.

51. An implantable hearing aid transducer as recited in claim 45, wherein the connecting means comprises:

a compliant member physically interposed between at least a portion of the tube and a wall of the transducer housing defining the aperture.

53. An implantable hearing aid transducer as recited in claim 40, wherein said retention apparatus comprises:

a retaining member;

at least one guide on the retaining member movable along a predetermined path of travel in a transducer mounting apparatus between an unlocked and a locked position; and

a resilient member compressible between the retaining member and the rotatable portion of the transducer housing to capture the rotatable portion in a desired angular orientation relative to an auditory component when the retention apparatus is in the locked position.

54. An implantable hearing aid transducer as recited in claim 53, wherein the retention apparatus further comprises:

a pair of diametrically opposed guides engageable with a channel defined in the mounting apparatus and movable within the channel to compress the resilient member between the retaining member and the rotatable portion of the transducer housing.

55. An implantable hearing aid transducer as recited in claim 54, wherein the retaining member and the resilient member are interconnected as a single unit.

56. An implantable hearing aid transducer as recited in claim 54, wherein the retention apparatus is receivable in a cavity of the mounting apparatus.

57. An implantable hearing aid transducer as recited in claim 56, wherein when the retention apparatus is in the locked position the rotatable portion of the transducer housing is rotatable within the cavity when a predetermined amount of force is applied.

58. An implantable hearing aid transducer as recited in claim 54, wherein the retention apparatus further comprises:

a pair of detents engageable with a feature of the channel to lock the resilient member in a compressed state.

59. An implantable hearing aid transducer as recited in claim 40, wherein the rotatable portion of the transducer housing is rotatable within the cavity to align one of an aperture in the transducer housing and an actuator axis with a desired interface point on an auditory member.

60. An implantable hearing aid transducer as recited in claim 40 wherein the rotatable portion of the transducer housing is rounded for rotation relative to the mounting apparatus.

61. An implantable hearing aid transducer as recited in claim 40, wherein the retention apparatus is selectively movable between a locked and unlocked position.

62. An implantable hearing aid transducer as recited in claim 61, wherein the rotatable portion of the transducer housing is rotatable, upon application of a predetermined amount of force, relative to the mounting apparatus, when the retention apparatus is in the locked position.

47. (canceled)

48. (canceled)

49. (canceled)

50. (canceled)

52. (canceled)

63. An implantable hearing aid transducer mountable to a transducer mounting apparatus, the transducer comprising:

a transducer housing having a rotatable portion, wherein the rotatable portion of the transducer housing is rotatable relative to a transducer mounting apparatus, and wherein during rotation a center of rotation of the rotatable portion of the transducer housing remains positionally fixed;

an actuator supportably interconnected to said transducer housing and operable stimulate a middle ear component;

a driver comprising at least one magnet and one coil, wherein one of the at least one magnet and one coil is connectable to the actuator to induce movement of the actuator relative to the transducer housing in response to transducer drive signals; and

a seal disposed around the one of the at least one magnet and one coil connected to the actuator to protect the one of the one of the at least one magnet and one coil from body fluids.

64. An implantable hearing aid transducer as recited in claim 63, wherein the actuator is a separate structure from the transducer housing that is insertable into and advanceable through an aperture of the transducer housing.

65. An implantable hearing aid transducer as recited in claim 64, wherein the rotatable portion of the transducer housing is rotatable to align one of an actuator axis and the aperture with a desired interface point on a middle ear component.

66. An implantable hearing aid transducer as recited in claim 63, wherein the actuator extends through an aperture of the transducer housing.

67. An implantable hearing aid transducer as recited in claim 66, further comprising:

a tube connected to the one of the at least one magnet and one coil, wherein the tube is connectable to the actuator subsequent to the transducer housing being implanted in the patient to connect the one of the at least one magnet and one coil to the actuator.

68. An implantable hearing aid transducer as recited in claim 67, further comprising:

connecting means for movably connecting the tube within the aperture of the transducer housing, wherein the connecting means permits the one of the at least one magnet and one coil to induce movement of the tube within the aperture relative to the transducer housing.

69. An implantable hearing aid transducer as recited in claim 68, wherein the connecting means permits axial movement of the tube while restricting lateral movement of the tube relative to the transducer housing.

74. An implantable hearing aid transducer as recited in claim 68, wherein the connecting means comprises:

a compliant member physically interposed between at least a portion of the tube and a wall of the transducer housing defining the aperture.

76. An implantable hearing aid transducer as recited in claim 74, wherein at least a portion of the compliant member defines at least a portion of said seal.

70. (canceled)

71. (canceled)

72. (canceled)

73. (canceled)

75. (canceled)