Patent ID: 9149615
Filing Date: 2015-10-06
Classification: A61M,F16K

Abstract:
1. A method of positioning a toolset on the exterior of a patient relative to a magnetically adjustable device implanted in the patient, the implanted device including a rotor having an axis of rotation and at least one rotor magnet, the rotor having a range of arcuate motion within each of a plurality of selectable performance settings without altering a selected performance setting for the implanted device, the rotor defining a plurality of radially flat cam surfaces, each cam surface occupying an arc about the axis of rotation, and wherein the rotor is disposed at a first location in a casing of the implanted device and has an axle which turns about the axis of rotation, the method comprising: estimating a location on the exterior of the patient above the implanted device; moving the toolset to the estimated location; detecting the location of at least one of a maximum positive pole value and a maximum negative pole value of the rotor magnet at a current performance setting; moving the toolset relative to the at least one detected maximum pole value; moving the rotor in a first arcuate direction and detecting a first limit of travel without altering the current performance setting; moving the rotor in a second, opposite direction and detecting a second limit of travel without altering the current performance setting; comparing the first and second limits of travel with known values for the plurality of selectable performance settings; and indicating the current performance setting of the implanted device.