MRI-safe implant magnet with angular magnetization
AssigneeMED-EL Elektromedizinische Geraete GmbH
InventorMartin Zimmerling
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Abstract
A magnetic arrangement is described for an implantable system for a recipient patient. An implantable coil housing contains a signal coil for transcutaneous communication of an implant communication signal. Freely rotatable within the coil housing is a cylindrical implant magnet for transcutaneous magnetic interaction with a corresponding external attachment magnet. The implant magnet has a central cylinder axis of symmetry, and a magnetization direction along a magnetic axis angled away from the axis of symmetry at a non-zero angle less than 45 degrees.
Claims8
A magnetic arrangement for an implantable system for a recipient patient, the arrangement comprising:
- an implantable coil housing containing a signal coil for transcutaneous communication of an implant communication signal;
- a cylindrical implant magnet freely rotatable within the coil housing for transcutaneous magnetic interaction with a corresponding external attachment magnet, the implant magnet having:
- i. a central cylinder axis of symmetry, and
- ii. a magnetization direction along a magnetic axis angled away from the axis of symmetry at a non-zero angle less than 45 degrees.
Dependencies are inferred from the claim text.