Variable-output radiofrequency ablation power supply

摘要

A medical system is provided, including an ablation system having at least one ablation element and a sensor, a generator operable to deliver radiofrequency ablation energy to the ablation element. A power supply defines a duty cycle and provides a voltage to the generator, and the power supply has a duty cycle modulator and an amplitude modulator. A processor is connected to the power supply, the generator, and the sensor. The processor obtains a feedback signal from the sensor, and adjusts the duty cycle modulator and the amplitude modulator according to the feedback signal.

主权项

1. A method of treating a patient with an ablation system having a generator, an ablation element, a sensor, and a power supply comprising a variable resistance operatively coupled between the sensor and a processor, the method comprising:
selecting an energy delivery mode for treatment from at least one of monopolar ablation energy and bipolar ablation energy; selecting a desired value of an operating parameter; placing the ablation element and sensor proximate to a treatment site; delivering an electrical output from the power supply to the generator; delivering ablation energy from the generator to the ablation element; measuring a value of the operating parameter with the sensor; comparing the measured value of the operating parameter to the desired value of the operating parameter to determine a comparison value; and modulating the amplitude of the electrical output from the power supply by the processor altering the variable resistance based on the comparison value.