Retention apparatus for an external portion of a semi-implantable hearing aid

• US 20040133065A1
• Filed: 10/02/2003
• Published: 07/08/2004
• Est. Priority Date: 10/02/2002
• Status: Active Grant

• Current Assignee: Otologics, LLC
• Original Assignee: Otologics, LLC
• Inventors: Andrews, Travis Rian, Easter, James Roy, Mellers, Peter Robert
• Granted Patent: US 7,386,143 B2
• Time in Patent Office: Days
• US Class Current: 600/25
• CPC Class Codes: H04R 25/505 using digital signal processing
• CPC Class Codes: H04R 25/554 using a wireless connection, e.g. between microphone and amplifier or using Tcoils
• 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

A retention apparatus for a semi-implantable hearing aid. In one embodiment, the retention apparatus includes a first surface and a second surface. One of the first and second surfaces includes a first portion and a second portion having a rounded transition therebetween for interfacing with a patient'"'"'s skin. The rounded transition of the interfacing surface of the retention apparatus functions to distribute pressure resulting from the mutual magnetic attraction between an externally located magnet and an implanted magnet to permit increased magnetic forces therebetween and maintenance of a desired separation between an external coil and implanted coil.

Claims

1. A retention apparatus for an external housing of a semi-implantable hearing aid, comprising:

a disk member disposable between a patient'"'"'s skin and an external housing, wherein the external housing contains at least one external component of the semi implantable hearing aid, and wherein the disk member includes a first surface to form an interface with the external housing and a second surface to form an interface with the patient'"'"'s skin, and wherein the second surface includes at least one rounded transition between a first and second portion of the second surface.

2. The retention apparatus of claim 1 wherein the at least one rounded transition provides a contoured shape to distribute pressure over an area of the patient'"'"'s skin contacted by the second surface.

3. The retention apparatus of claim 2 wherein the contoured shape is a shallow dish shape.

4. The retention apparatus of claim 1 wherein the rounded transition includes a predetermined radius to maintain a predetermined distance between a first coil located in the housing and a second coil located subcutaneously on the patient.

5. The retention apparatus of claim 1 wherein the disk member is magnetic in nature.

6. The retention apparatus of claim 1 comprising:

a receptacle defined in the first surface for receiving a first magnet.

7. The retention apparatus of claim 6 wherein the disk member is retained in position relative to the housing by the first magnet and a second magnet in the housing.

8. The retention apparatus of claim 3 wherein the first surface forms an interface with the housing and a portion of the patient'"'"'s hair.

9. An external apparatus for a semi-implantable hearing aid, comprising:

a housing containing at least one component of the semi implantable hearing aid, wherein the housing includes an interface for retentive positioning of the housing on a patient'"'"'s skin, wherein the interface includes a first surface having at least one rounded transition between a first portion and a second portion of the first surface; and

a first magnetic apparatus for retentive positioning of the first surface in juxtaposed relation to an implanted portion of the semi-implantable hearing aid.

10. The apparatus of claim 9 wherein the interface is an integral part of the housing.

11. The apparatus of claim 9 wherein the interface is a separate structure from the housing and includes a second surface for interfacing with the housing.

12. The apparatus of claim 9 wherein the at least one rounded transition provides a contoured shape to distribute pressure over an area of the patient'"'"'s skin contacted by the first surface.

13. The apparatus of claim 12 wherein the contoured shape is a shallow dish shape.

14. The apparatus of claim 9 wherein the rounded transition includes a predetermined radius to define a predetermined distance between a first coil located in the housing and a second coil located subcutaneously on the patient.

15. The apparatus of claim 11 wherein the interface is magnetic in nature.

16. The apparatus of claim 11 comprising:

a receptacle defined in the second surface for receiving a second magnet.

17. The apparatus of claim 16 wherein the interface is retained in position relative to the housing by the first and second magnets.

18. The apparatus of claim 11 wherein the second surface forms an interface with the external housing and a portion of the patient'"'"'s hair.

19. A method for mounting an external portion of a semi-implantable hearing aid on a patient, the method comprising:

providing a surface on the external portion that includes a contoured contact portion for contacting the patient'"'"'s skin;

providing a radius of the contoured contact portion as a function of a magnetic attraction between an implanted magnet and an externally located magnet; and

disposing the external portion of the semi implantable hearing aid on the patient proximate the implanted magnet.

20. The method of claim 19 wherein the disposing step comprises:

locating a housing containing at least one component of the semi implantable hearing aid proximate the implanted magnet.

21. The method of claim 20 wherein the disposing step comprises:

prior to locating the housing, interfacing a disk shaped retention apparatus including the contoured contact portion with the housing; and

locating the interfaced disk shaped retention apparatus and the housing on the patient proximate the implanted magnet.

22. The method of claim 19 wherein the providing the radius step comprises:

providing one of a range of radii to achieve a predetermined depression of the contoured contact portion into the patient'"'"'s skin to achieve a desired separation between a first coil located externally to the patient and a second coil located subcutaneously on the patient.

23. The method of claim 22 wherein the providing one of the range of radii step comprises:

selecting the one of the range of radii as a function of at least one of the magnetic attraction and the thickness of the patient'"'"'s skin.

24. The method of claim 19 the method comprising:

varying one of the radius and the magnetic attraction to achieve the predetermined depression of the contoured contact portion into the patient'"'"'s skin to achieve the desired separation between the first coil and the second coil.

25. The method of claim 19 wherein the method comprises:

providing one of a plurality of magnets having range of magnetic attractions to achieve a predetermined depression of the contoured contact portion into the patient'"'"'s skin to achieve a desired separation between a first coil located externally to the patient and a second coil located subcutaneously on the patient; and

locating the magnet in a receptacle of the external portion.

26. The method of claim 25 comprising:

retaining the disk shaped retention apparatus in a juxtaposed position relative to the housing using magnetic attraction between the disk shaped retention apparatus and the housing.

27. The method of claim 21

retaining a portion of the patient'"'"'s hair between the interfaced disk shaped retention apparatus and housing.