External adjustment device for distraction device

摘要

An external adjustment device includes at least one permanent magnet configured for rotation about an axis with a first handle extending linearly at a first end of the device and a second handle at a second end of the device, the second handle extending in a direction substantially off axis to the first handle. The external adjustment device further includes a motor mounted inside the first handle and a first button located in the proximity to one of the first handle or the second handle, the first button configured to be operated by the thumb of a hand that grips the one of the first handle or second handle. The first button is configured to actuate the motor causing the at least one permanent magnet to rotate about the axis in a first direction.

主权项

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.