An electrosurgical generator includes a processor and a memory storing instructions executable by the processor. The instructions when executed, cause the generator to provide an indicated treatment energy to the instrument, where the indicated treatment energy is set by a user and having a corresponding current limit, receive signals from the instrument over time relating to a load impedance between the active electrode and the return electrode of the instrument, determine based on the signals that the active electrode and the return electrode are currently shorted together, and prior to the short, the instrument was grasping tissue between the active electrode and the return electrode, and based on the determination, reduce a current limit of treatment energy being provided to the instrument to below the corresponding current limit.

The invention includes a system for generating virtual images of proposed and designated areas on a patient's anatomy that are to be treated in a RFA procedure. The images include a size, shape, and location of lesion/ablation patterns. The virtual images include dynamic (developing) or static (developed) lesions selected for the RFA procedure. The images are provided on at least one user interface that superimposes or overlays the lesion pattern(s) on an image of a patient's anatomy that undergoes the procedure. The images can be used to accurately and efficiently conduct RFA procedures and to record the procedures with enhanced visual data to confirm treated tissue areas. The invention further includes a diagnostic method of generating images in preparation for a RFA procedure, and a method of conducting the RFA procedure in which measured parameters determine the size and shape of the ablated areas achieved in the procedure.

An apparatus includes a current source, an electronic circuit and a circuit board. The current source is configured to flow an electrical current having a selected frequency between a pair of electrodes coupled to a medical probe. The electronic circuit is configured to measure a single-ended voltage relative to ground that is formed on at least one of the electrodes in the pair in response to the electrical current, and, based on the measured voltage, to assess physical contact between the at least one of the electrodes and tissue. The circuit board includes the current source and the electronic circuit, and includes a layout that produces, at the selected frequency, a predefined capacitance between the current source and ground, thus forming a reference for measurement of the single-ended voltage.

A surgical instrument includes a housing having an elongated shaft extending distally therefrom and configured to support an end effector assembly at a distal end thereof. The end effector assembly includes first and second jaw members each having a tissue sealing plate disposed thereon and adapted to connect to an electrosurgical energy source for delivery thereto upon activation thereof. A sensor is disposed on one (or both) of the tissue sealing plates and is configured to communicate data relating to tissue disposed between the first and second jaw members to the electrosurgical energy source for correlation to a resonance frequency of the tissue. The resonance frequency of the tissue, in turn, is used to adjust one or more parameters associated with the delivery of electrosurgical energy to the tissue upon activation thereof.

A system includes a pulse waveform generator and an ablation device coupled to the pulse waveform generator. The ablation device includes at least one electrode configured for ablation pulse delivery to tissue during use. The pulse waveform generator is configured to deliver voltage pulses to the ablation device in the form of a pulsed waveform. The pulsed waveform can include multiple levels of hierarchy, and multiple sets of electrodes can be activated such that their pulsed delivery is interleaved with one another.

A method for controlling an operation of an ultrasonic blade of an ultrasonic electromechanical system is disclosed. The method includes providing an ultrasonic electromechanical system comprising an ultrasonic transducer coupled to an ultrasonic blade via an ultrasonic waveguide; applying, by an energy source, a power level to the ultrasonic transducer; determining, by a control circuit coupled to a memory, a mechanical property of the ultrasonic electromechanical system; comparing, by the control circuit, the mechanical property with a reference mechanical property stored in the memory; and adjusting, by the control circuit, the power level applied to the ultrasonic transducer based on the comparison of the mechanical property with the reference mechanical property.

Electrosurgical systems and methods are provided for RF nerve ablation, wherein a control console has multiple RF amplifiers associated with multiple channels, and multiple DC power supplies each dedicated to a corresponding one of the RF amplifiers. Each of a plurality of power supply relays are coupled between one of the DC power supplies and the dedicated corresponding one of the RF amplifiers. A controller is configured to apply switching signals to control each of the power supply relays to selectively switch on and off connections between the DC power supplies and the dedicated corresponding RF amplifiers. The controller may apply control signals to each RF amplifier sequentially, one at a time, to deliver energy separately and independently to each of the corresponding channels. The controller may be configured to apply the switching signals to self-grounding relays to selectively switch on and off connections between the channels and return relays.

Described herein is a method of treating migraines using PFA ablation technology which includes advancing a pulse field ablation delivery member into a nasal cavity (both unilateral and bilateral) of a patient with the pulse field ablation member in a first collapsed configuration and contacting a surface of a nasal cavity tissue with the pulse field ablation delivery member without penetrating or piercing the nasal cavity tissue surface. The treatment further includes reconfiguring the pulse field ablation delivery member from the first collapsed configuration to an expanded configuration after introducing the pulse field ablation member into the desired position within the nasal cavity, and ablating a target treatment site with the pulse field ablation delivery member in order to treat or prevent at least one of the group of medical conditions, wherein the target treatment site includes at least one nasal nerve tissue or nasal blood vessel with or without contact.

This invention is directed to compositions and methods for treating a condition of the heart. In an embodiment, the invention is directed to a method of treating a subject in need thereof, wherein the method comprises ablating at least one nerve of the renal artery of the subject; and administering to the subject a therapeutically effective amount of cells.

Electrosurgical systems and methods are provided for RF nerve ablation, wherein a control console is utilized with a passive or active cable accessory connecting to different of electrode attachments, such as monopolar and bipolar self-grounding types. The control console has multiple RF amplifiers that are associated with multiple channels of the control console and that are energized according to control signals non-simultaneously applied by a controller of the control console. The control console stores and processes identification data and usage data relating to cable accessories and electrode attachments that are connected or have been connected to the control console over time. The control console displays a representation of this processed data on a graphical user interface. The control console further provides components and techniques for implementing stimulation and impedance verification/calibration for situations where the stimulation signals or impedance measurement signals are provided by the control console.