Patent ID: 8257296

Claim:
A system comprising: an implantable flow control device comprising an adjustable valve and a magnetic device coupled to the valve to indicate a current setting of the valve; and an electronic valve indicator and locator device comprising: a locator tool comprising a processing module; an electronic magnetic-based indicator tool configured to couple with the locator tool, the indicator tool comprising an electronic compass module for measuring an orientation of sensed magnetic fields and a locator tool interface module for electronically communicating sensed magnetic fields to the processing module; and wherein the processing module is programmed to: receive and store background magnetic field data; receive target magnetic field data from the electronic compass module when the indicator tool is coupled to the locator tool and positioned above the implantable flow control device; and electronically determine the setting of the valve based on the background magnetic field data and the target magnetic field data; an adjustment tool configured to align with the locator tool for modifying the setting of the valve in the implantable flow control device based on the setting determined by the processing module when magnetically coupled to the implantable flow control device; wherein the adjustment tool includes a magnetic component configured to couple with the magnetic device of the implantable flow control device.