ELECTRONIC TOOLSET TO LOCATE, READ, ADJUST, AND CONFIRM ADJUSTMENT IN AN IMPLANTABLE BODILY FLUID DRAINAGE SYSTEM WITHOUT RECALIBRATING FOLLOWING ADJUSTMENT

摘要

A method of using an electronic toolset for locating, reading, adjusting and confirming adjustment of an implantable bodily fluid drainage system without requiring recalibration following adjustment from a current valve setting to a new valve setting using an electronic toolset including an adjustment tool having a magnetic element and an indicator tool including a sensor array. The need to remove the electronic toolset from the patient to recalibrate or zero the sensor array prior to confirming the new valve setting is eliminated. This is realized by disposing a ferromagnetic system component of the indicator tool in a magnet shield cage (1715, 1720) made of a metallic alloy to prevent magnetic fields produced by a magnetic element in the adjustment tool during the adjusting step from influencing the sensor array.