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1. (WO2018200347) MRI-SAFETY AND FORCE OPTIMIZED IMPLANT MAGNET SYSTEM

Pub. No.:    WO/2018/200347    International Application No.:    PCT/US2018/028785
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Tue Apr 24 01:59:59 CEST 2018
IPC: H04R 25/00
A61F 2/18
A61N 1/08
A61N 1/36
A61N 1/37
A61N 1/372
Applicants: MED-EL ELEKTROMEDIZINISCHE GERAETE GMBH
Inventors: EIGENTLER, Thomas Wilhelm
Title: MRI-SAFETY AND FORCE OPTIMIZED IMPLANT MAGNET SYSTEM
Abstract:
A magnet arrangement for an implantable medical device is described. An implant magnet has a modified disc shape and is capable of responding to an external magnetic field by rotating about a primary center rotation axis. The implant magnet shape has at least one cross-sectional view in which the cylindrical diameter corresponds to a horizontal coordinate axis, the center symmetry axis corresponds to a vertical coordinate axis, the height between the end surfaces is greatest at the center symmetry axis, and the height between the end surfaces progressively decreases from the center symmetry axis along the cylindrical diameter towards the outer circumference to define a secondary deflection angle with respect to the horizontal coordinate axis so that the implant magnet is capable of responding to the external magnetic field by deflecting within the secondary deflection angle about a secondary deflection axis defined by a cylinder diameter normal to the cross-sectional view.