EP1417861A2 - Implantierte hörgeräte - Google Patents
Implantierte hörgeräteInfo
- Publication number
- EP1417861A2 EP1417861A2 EP01957678A EP01957678A EP1417861A2 EP 1417861 A2 EP1417861 A2 EP 1417861A2 EP 01957678 A EP01957678 A EP 01957678A EP 01957678 A EP01957678 A EP 01957678A EP 1417861 A2 EP1417861 A2 EP 1417861A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- hearing aid
- coil
- arrangement according
- magnet
- aid arrangement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 210000000959 ear middle Anatomy 0.000 claims abstract description 14
- 210000003454 tympanic membrane Anatomy 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 2
- 210000003027 ear inner Anatomy 0.000 claims 1
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 102100023170 Nuclear receptor subfamily 1 group D member 1 Human genes 0.000 description 2
- 206010011878 Deafness Diseases 0.000 description 1
- 210000000613 ear canal Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000010370 hearing loss Effects 0.000 description 1
- 231100000888 hearing loss Toxicity 0.000 description 1
- 208000016354 hearing loss disease Diseases 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Definitions
- the present invention relates to an implanted hearing aid or hearing device arrangement, according to the preamble of claim 1, and a method for hearing amplification by means of a hearing aid or hearing device arrangement.
- a wide variety of types of electromechanical actuators for implantable hearing aids are known from the literature and from patents.
- these middle ear actuators achieve their effect by converting electrically amplified signals into mechanical movements and transferring them to the ossicular chain of the middle ear.
- a middle ear actuator would ideally provide the most efficient possible amplification of the mechanical movement of the middle ear in the active state.
- the actuator when the actuator is at rest, it should have the least possible influence on the natural movement of the ossicles.
- the amplification of the movement of the ossicles caused by the actuator is large to very large. This corresponds to deflections of the footplate of the stirrup in the range from 1 to 100 ⁇ m and forces of up to 10 ⁇ m.
- An actuator is known from US Pat. No. 5,800,336 (Ball et al, Symphonix) which approximately meets the requirement of non-contact. When this actuator is at rest, only its mass influences the natural movement of the ossicles. Due to the anatomical conditions in the middle ear, the actuator volume of this device is limited. The actuator can therefore only produce small to medium amplifications of the movement of the middle ear.
- a further actuator is known from US Pat. No. 6,088,975 (Perkins, Resound) which fulfills the requirement of non-contact.
- a coil is fixed on the promontory and a permanent magnet on the inside of the eardrum. Calculations have shown that this arrangement does not satisfactorily meet the high performance requirement.
- Limiting factors are the limited current density in the wires of the coil and the low efficiency of the coupling. Since the coupling is inefficient and the capacity of suitable energy sources that patients can carry with them is also limited, sufficient autonomy of the patients is hardly achieved. In addition, the inefficient coupling harbors the danger that heat is supplied to the middle ear to a harmful degree.
- the actuator proposed according to the invention is based on an arrangement which provides a relatively large permanent magnet on the promontory and has a small coil either behind the eardrum or at another suitable location on the ossicular chain.
- US Pat. No. 6,084,975 it is proposed to borrow the permanent magnet in the region of the
- eardrums Arrange eardrums, which limits the size of the permanent magnet.
- a larger permanent magnet can be arranged on the promontory, which is a rigid, bone-like structure, which is advantageous.
- the arrangement proposed according to the invention fulfills the requirement of non-contact and has the advantage over solution US 6'084'975 that a large part of the required magnetic flux is already provided by the permanent magnet. As a result, smaller currents in the coil are sufficient to generate the required movement. It can be assumed that this arrangement can also be used to achieve relatively large deflections and high forces.
- a further advantage is that the coil can be made smaller and, by arranging the coil on the eardrum, better heat flow through the outer auditory canal is ensured, which means that a further considerably less heat is generated than is the case in the arrangement according to US Pat. No. 6,084,975.
- Figure 1 shows schematically a section through the middle ear and the inventive arrangement of the hearing aid.
- the middle ear 1 Arranged in the middle ear 1 is the ossicular chain, comprising the hammer 3, anvil 5 and stirrup 7.
- the eardrum 11 is located between the middle ear 1 and the outer auditory canal 9.
- the promontory 13, which is also a bone-like, rigid one, can be seen Entity acts.
- a permanent magnet 15 on the promontory, while the coil 17 is arranged either on the eardrum itself or, for example, on the hammer 3 in the area of the eardrum.
- a substantially smaller coil 17 can be arranged accordingly, which brings with it important advantages. On the one hand, much smaller currents in the coil are sufficient to generate the required movement, and on the other hand, there is much less heat. In addition, by arranging the coil in the area of the drum The heat can be dissipated to the outside more efficiently through the external auditory canal 9, which is more difficult when a coil 17 is arranged on the promontory 13.
- the feeding of the coil was not shown, but this can either be done through the eardrum or through corresponding passages through the cranium in the area of the middle ear.
- FIG. 1 is of course only an example of the arrangement for illustrating the present invention.
- Both the dimensioning of the permanent magnet and the exact arrangement of the permanent magnet and coil can be selected differently in the area of the promontory and in the area of the eardrum or the ossicular chain.
- both the geometric shape of the coil or coils and that of the magnet can be selected differently.
- the easiest way to make a coil is circular, but it can also be oval.
- the surface inside the coil can be arranged parallel to the surface of the magnet, an arrangement orthogonal to the magnet or an arrangement at any angle between 0 and 180 ° to the magnet is also possible.
- a magnet is fixed to the promontory. But it can also be interchangeable, which can be advantageous for revisions.
- the position of the magnet can even be adjustable, which has the advantage that the air gap between the coil and the magnet can still be regulated after the fixation.
Landscapes
- Prostheses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CH2001/000505 WO2001091515A2 (de) | 2001-08-17 | 2001-08-17 | Implantierte hörgeräte |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1417861A2 true EP1417861A2 (de) | 2004-05-12 |
Family
ID=32097381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01957678A Ceased EP1417861A2 (de) | 2001-08-17 | 2001-08-17 | Implantierte hörgeräte |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1417861A2 (de) |
| JP (1) | JP2004531278A (de) |
| CA (1) | CA2457550A1 (de) |
-
2001
- 2001-08-17 CA CA002457550A patent/CA2457550A1/en not_active Abandoned
- 2001-08-17 JP JP2001586542A patent/JP2004531278A/ja active Pending
- 2001-08-17 EP EP01957678A patent/EP1417861A2/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0191515A3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004531278A (ja) | 2004-10-14 |
| CA2457550A1 (en) | 2001-11-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20031127 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
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| AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
| 17Q | First examination report despatched |
Effective date: 20070822 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R003 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
| 18R | Application refused |
Effective date: 20111205 |