ELECTRONIC VALVE READER
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Abstract
The invention is directed toward a magnetic valve reader used as an indicator tool. The magnetic valve reader determines a location and an orientation for a magnetic indicator device to indicate a device setting of an implantable medical device. The implantable medical device includes the magnetic indicator device coupled to a valve on the implantable medical device. External magnetic fields, specifically the Earth'"'"'s magnetic field, may interfere with the compass and create an incorrect device setting indication. The electronic reader estimates the external magnetic fields to subtract the estimate from received data to minimize any influence that external magnetic field has on the accuracy of the device setting measurement.
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Citations
22 Claims
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1. (canceled)
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2. An electronic magnetic-based indicator tool comprising:
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a housing having a display; a plurality of magnetic field sensors mounted with respect to the housing, wherein the plurality of magnetic field sensors determine special location and orientation of a magnetic indicator device associated with a valve on an implantable flow control device and a reference magnet coupled to the implantable flow control device at a location separate from the magnetic indicator device; and a processing module that receives magnetic data values from the plurality of magnetic field sensors and determines a setting for the valve using the determined orientation of the magnetic indicator device. - View Dependent Claims (3, 4, 6, 7, 8, 9)
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5. The electronic magnetic-base indicator tool of claim 5, wherein the processing module further subtract the estimate for ambient magnetic fields from received magnetic data values to determine the setting of the valve on the implantable flow control device.
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10. A system comprising
an implantable medical comprising a magnetic indicator device and a reference magnet, wherein the magnetic indicator device is associated with a valve on the implantable medical device and wherein the reference magnet is at a location separate from the magnetic indicator device; -
an electronic magnetic-based indicator tool comprising; a housing having a display; a plurality of magnetic field sensors; and a processing module that receives magnetic data values from the plurality of magnetic field sensors, determines and orientation of the indicator tool with respect to the magnetic indicator device and determines a setting for the valve; and an adjustment tool that modifies an orientation of the valve, wherein the adjustment tool comprises a magnetic component for magnetically coupling to the magnetic indicator device. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method comprising
providing an implantable medical device having a magnetic indicator device and a reference magnet, wherein the magnetic indicator device is associated with a valve on the implantable medical device, and wherein the reference magnet is at a location separate from the magnetic indicator device; -
placing an electronic magnetic-based indicator tool adjacent to the implantable medical device; measuring a magnetic field with the indicator tool; determining a spatial location and orientation of the implantable medical device using the measured magnetic field; and determining an orientation of the valve using the measured magnetic field. - View Dependent Claims (19, 20, 21, 22)
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Specification