Systems and methods for an implanted radiofrequency ablation system

A wireless radiofrequency ablation (RFA) system for medical treatment, comprising:

• an implanted system including:
• a receiving coil configured to wirelessly receive power, and
• one or more electrodes operably coupled to said receiving coil to deliver thermal energy to a target when powered by the wirelessly received power;
• and
• an external control system including:
• a radiofrequency (RF) generator, a transmission coil configured to wirelessly transmit power to the receiving coil, and
• a user interface configured to allow transmit power parameters to be input in order to control the RF generator, wherein the external control system is configured to measure reflected impedance, calculate a temperature at the target based on the measured reflected impedance, automatically adjust the transmit power parameters based on the calculated temperature.

A method for radiofrequency ablation comprising:

• positioning and aligning transmission coil over implanted receiving coil;
• perform sensory nerve and motor nerve testing to verify an electrode placement is not adjacent to tissue or nerves not requiring ablation;
• setting parameters of an external control system, including a time period and a target temperature;
• initializing the external control system, wherein initializing the system comprises setting an initial power increase amount and an initial time interval;
• measuring reflected impedance;
• and
• if reflected impedance is greater than a first threshold, increase power by set amount every interval,
• if the reflected impedance is between a second threshold and the first threshold, then reducing the power increase amount by a set amount and reducing the time interval, and
• if reflected impedance is below the second threshold, holding the power constant;
• maintaining a constant power for the time period once reflected impedance is equal to or below the second threshold;
• and
• reducing power and monitoring impedance rise to ensure cooling before removing transmission coil.