# US 8,539,956 B2 · System for use with an implantable medical device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,539,956 B2 - Document ID: US8539956B2 - Status: Granted - Kind: B2 - Application number: 13/595,178 - Filed: 2012-08-27 - Published: 2013-01-03 - Granted: 2013-09-24 - Earliest claimed: 2003-10-31 - Assignees: Medtronic, Inc. - Applicants: William J Bertrand; Lori C Speckman - Inventors: William J Bertrand; Lori C Speckman - Web page: https://patentgrep.com/patent/US8539956B2 ## CPC - A61M 27/006: {Cerebrospinal drainage; Accessories therefor, e.g. valves} - A61M 2205/3515: using magnetic means - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract A system for use with an implantable flow control device having an adjustable valve and a magnetic device coupled to the valve, the system including a locator tool and an electronic magnetic-based indicator tool. The locator tool includes a processing system and an electronic display. The indicator tool is configured to couple with the locator tool. The indicator tool includes an electronic compass module configured to detect and generate a first set of data based on an orientation of magnetic fields associated with the magnetic device as an indication of the setting of the valve and measure and generate a second set of data based on ambient background magnetic fields. The indicator tool electrically communicates the data to the locator tool. The processing system receives and uses the first and second sets of data generated from the electronic compass module to determine orientation of the magnetic device. ## Claims ### Claim 1 A system for use with an implantable flow control device having an adjustable valve and a magnetic device coupled to the valve to indicate a current setting of the valve, the system comprising: a locator tool including a processing system and an electronic display; and an electronic magnetic-based indicator tool configured to couple with the locator tool, the indicator tool including an electronic compass module configured to detect and generate a first set of data based on an orientation of magnetic fields associated with the magnetic device as an indication of the setting of the valve and configured to measure and generate a second set of data based on ambient background magnetic fields; wherein the indicator tool electrically communicates the first and second sets of data to the locator tool; and wherein the processing system receives and uses the first and second sets of data generated from the electronic compass module to determine orientation of the magnetic device. ### Claim 2 (depends on 1) The system of claim 1, further comprising an adjustment tool configured to magnetically couple with the indicator tool and rotate with respect to the locator tool for modifying the setting of the valve in the implantable flow control device when magnetically coupled to the implantable flow control device. ### Claim 3 (depends on 1) The system of claim 1, further comprising interface modules on the locator tool and the indicator tool configured to communicate data with each other. ### Claim 4 (depends on 1) The system of claim 1, wherein the electronic display provides a user with graphical and textual information associated with the operation of the system. ### Claim 5 (depends on 1) The system of claim 1, wherein the indicator tool further comprises a compass control module for controlling operation of the indicator tool based on the first and second sets of data. ### Claim 6 (depends on 1) The system of claim 1, wherein the indicator tool and the locator tool are handheld devices. ### Claim 7 (depends on 6) The system of claim 6, wherein the handheld devices include batteries. ### Claim 8 (depends on 1) The system of claim 1, wherein a processing module of the processing system subtracts the second set of data from the first set of data to determine the orientation of the magnetic device. ### Claim 9 (depends on 1) The system of claim 1, further comprising a key device for coupling the indicator tool into a predetermined orientation relative to the locator tool. ### Claim 10 A system for determining a valve setting of an implanted adjustable flow control having an adjustable valve and a magnetic device coupled to the valve to indicate a current setting of the valve device, the system comprising: an electronic magnetic-based indicator tool comprising an electronic target compass configured to detect and generate a first set of data based on an orientation of magnetic fields associated with the magnetic device as an indication of the setting of the valve; and a locator tool configured to receive and couple with the indicator tool, the locator tool comprising an electronic background compass module configured to measure and generate a second set of data based on ambient background magnetic fields and a processing module configured to receive the first and second sets of data and to determine the valve setting based on the first and second sets of data; and wherein the locator tool and the indicator tool are configured to electronically communicate with each other. ### Claim 11 (depends on 10) The system of claim 10, wherein the processing module subtracts the second set of data from the first set of data to obtain the valve setting. ### Claim 12 (depends on 10) The system of claim 10, wherein the background compass module is located on the locator tool such that it does not readily detect magnetic fields from the magnetic device when aligned with the implantable flow control device. ### Claim 13 (depends on 10) The system of claim 10, wherein the locator tool further comprises a display module configured to electronically display valve setting information. ### Claim 14 (depends on 10) The system of claim 10, further comprising an adjustment tool configured to magnetically couple with the indicator tool and rotate with respect to the locator tool for modifying the valve setting of the valve in the implantable flow control device when magnetically coupled to the implantable flow control device. ### Claim 15 (depends on 10) The system of claim 10, wherein the indicator tool is keyed into a predetermined orientation relative to the locator tool. ### Claim 16 (depends on 10) The system of claim 10, wherein the target compass comprises at least one magnetic field detector device. ### Claim 17 (depends on 10) The system of claim 10, wherein the indicator tool and the locator tool are handheld devices. ### Claim 18 A system for use with 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, the system comprising: a locator tool for locating an orientation of the implantable flow control device; and an electronic magnetic-based indicator tool configured to nest with the locator tool, the indicator tool comprising: an electronic compass module for measuring and generating data based on an orientation of magnetic fields associated with the magnetic device as an indication of the setting of the valve and ambient background magnetic fields; a processing system for receiving the data generated from the electronic compass module to determine the valve setting; and an electronic display for providing a user with graphical and textual information associated with the operation of the system. ### Claim 19 (depends on 18) The system of claim 18, wherein the indicator tool further comprises a compass control module for controlling operation of the indicator tool based on the data. ### Claim 20 (depends on 18) The system of claim 18, further comprising an adjustment tool for rotating the indicator tool and modifying the valve setting of the valve in the implantable flow control device when magnetically coupled to the implantable flow control device.