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Inductive link with ferrite sheets

A technology of coils and communication coils, applied in artificial respiration, physical therapy, electrotherapy, etc.

Inactive Publication Date: 2013-01-23
MED EL ELEKTROMEDIZINISCHE GERAETE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, strong RF fields can also cause eddy currents in metallic components of the system, such as housings, battery electrodes, etc.

Method used

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  • Inductive link with ferrite sheets
  • Inductive link with ferrite sheets
  • Inductive link with ferrite sheets

Examples

Experimental program
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Embodiment Construction

[0021] Various embodiments of the invention relate to magnetically shielded lens arrangements for use with communication coils in medical implant systems, such as cochlear implant systems. A planar coil shielding lens is positioned between one of the coils and the electronics module to facilitate coupling of system communication signals between the coils and to shield the electronics module from interacting with magnetic field components of the communication signals. Typically a ferrite disk will be used as a specific example of a coil shielding lens.

[0022] Figure 2A One example of the coil and shielding lens is shown, where the substantially planar communication coil 202 may be either a transmit coil or a receive coil or both in a medical implant system such as a cochlear implant system. The communication coil 202 is lined by a coil shield lens 201 in the specific form of a sheet of ferrite material having a lens thickness 203 . Figure 2B A cross-sectional view of the ...

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Abstract

An arrangement is described for a partially implantable medical system. A communications coil is adapted for placement parallel to a corresponding partner coil for communication of an implant communications signal having an associated magnetic field component. An implant electronics module is adjacent to the communications coil and electrically connected with it for coupling of the communications signal. And a planar coil shield lens is between the communications coil and the electronics module to promote coupling of the communications signal between the coils and to shield the electronics module from interaction with the magnetic field component.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application 61 / 324,463, filed April 15, 2010, which is hereby incorporated by reference. technical field [0003] The present invention relates to implantable medical devices, such as cochlear implant systems, and in particular to energy conversion mechanisms in such devices. Background technique [0004] Such as figure 1 As shown in , a normal ear transmits sound through the outer ear 101 to the eardrum 102 , which moves the bones of the middle ear 103 , which in turn stimulates the cochlea 104 . In response to received sound transmitted by the middle ear 103, the fluid-filled cochlea 104 acts as a transducer transmitting waves to generate electrical impulses that are transmitted to the cochlear nerve 113 and ultimately to the brain. [0005] Some people have partial or complete loss of normal sensorineural hearing. Cochlear implant systems have been develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N1/36A61N1/372A61N1/378
CPCA61N1/36032A61N1/3787A61N1/37223A61N1/36038
Inventor 马丁·J·凯尔贝多米尼克·汉默勒马蒂亚斯·灿格莱
Owner MED EL ELEKTROMEDIZINISCHE GERAETE GMBH