Patent ID: 9248043
Filing Date: 2016-02-02
CPC Classification: A61B,A61F

Claim Text:
1. An external adjustment device configured to be placed on a subject's body and to magnetically adjust a distraction device implanted within the subject's body, the external adjustment device comprising: at least one permanent magnet configured for rotation about an axis; a motor configured for rotating the at least one permanent magnet about the axis; a control panel configured to actuate the motor causing the at least one permanent magnet to rotate about the axis in a first direction; and a first magnetic sensor in proximity to the at least one permanent magnet and fixed at a particular clock location in relation to the axis of the at least one permanent magnet, wherein the first magnetic sensor is configured to sense a rotating magnetic field of the at least one permanent magnet produced by rotation of the motor, and to output a first time-variable voltage based at least in part on a time-variable strength of the sensed magnetic field corresponding to rotation of the at least one permanent magnet.