Patent ID: 11918280
Assignee: MEDTRONIC ABLATION FRONTIERS LLC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. A method of determining a location of a treatment device during an ablation procedure within a patient, the method comprising:
delivering ablation energy from an energy generator to an ablation electrode of the treatment device to an area of tissue;
delivering navigation energy to a plurality of external patch electrodes from a plurality of navigation energy sources, the navigation energy delivered by each of the plurality of navigation energy sources being a same frequency;
filtering the delivery of the ablation energy and the delivery of navigation energy using a first filter that is applied to an input of the navigation energy sources, the first filter allowing navigation energy to pass between the treatment device and the plurality of navigation energy sources while presenting a high impedance and preventing the ablation energy from entering the plurality of external patch electrodes;
transmitting a plurality of voltage signals from a mapping electrode of the medical device to a processing unit, the processing unit time-division multiplexing the voltage signals, wherein the processing unit time-division multiplexes the voltage signals in each of a first plane, a second plane, and a third plane; and
determining a location of the medical device within a patient based on the time-division multiplexed voltage signals.