An electrosurgical apparatus for generating a plasma discharge beam is provided. In one aspect, the electrosurgical apparatus includes a first fluid flow housing, a second fluid flow housing, and an electrode. A first gas is provided to the distal end of the first fluid flow housing, where the electrode is energized to ionize the first gas and generate a plasma discharge beam. A second gas is provided to the distal end of the second fluid flow housing, where the distal end of the second fluid flow housing injects the second gas into the plasma discharge beam. In another aspect, the electrosurgical apparatus includes a single fluid flow housing having an external electrode and an internal electrode. In another aspect, the electrosurgical apparatus includes a transformer assembly having a plurality of serially-connected transformers.

A surgical instrument comprising an end effector is disclosed. The end effector comprises a surgical dissector. The surgical dissector can apply mechanical and/or electrosurgical energy to treated tissue.

Embodiments relate to circuitry to provide amplitude modulated waveforms in electrosurgical devices. The circuitry can be included in an electrosurgical generator device to provide the amplitude modulated waveforms to an electrosurgical probe coupled with the electrosurgical generator device.

A surgical instrument connectable to a surgical energy module that is configured to provide a first drive signal at a first frequency range for driving a first energy modality and a second drive signal at a second frequency range for driving a second energy modality is provided. The surgical instrument can comprise a surgical instrument component configured to receive power from a direct current (DC) power source, an end effector, and a circuit. The circuit can be configured to convert the first electrical signal to a DC voltage, apply the DC voltage to the surgical instrument component, and deliver the second energy modality to the end effector according to the second drive signal. Alternatively, the circuit can be disposed within a cable assembly configured to connect the surgical instrument to the surgical energy module.

A modular energy system including a header module configured to removably connect to an energy module. The energy module can comprise a port configured to deliver one or more energy modalities to a surgical instrument connected thereto. The header module can comprise a display screen configured to display a user interface. The header module can further include a control circuit configured to detect attachment of energy modules to the modular energy system and control the display of the user interface to display UI portions for each connected module and reconfigure the displayed UI portions to accommodate the new UI portions as additional energy modules are connected to the modular energy system.

An electrosurgical system is provided and includes a bipolar electrosurgical instrument and an electrosurgical generator. The bipolar electrosurgical instrument is arranged to seal and cut tissue captured between jaws of the bipolar electrosurgical instrument. The electrosurgical generator is arranged to supply RF energy through the bipolar electrosurgical instrument, monitor the supplied RF energy, and adjust or terminate the supplied RF energy to optimally seal the tissue.

An adapter can include circuitry that can toggle between a mapping state and an ablation state. In the mapping state the circuitry can connect the catheter to a mapping system so that the catheter can measure electrical signals from multiple independent electrodes on an end effector of the catheter. In the ablation state the circuitry can connect the catheter to an ablation generator so that the catheter can apply electrical signals to the electrodes to ablate using IRE and/or RF techniques. The circuitry can short together a group of electrodes in the ablation state and electrically isolate the electrodes in that group from each other when in the mapping state. Using the adapter, the catheter can ablate and map at a treatment site without having to be repositioned between the mapping and ablation steps.

In one embodiment, a medical system includes a catheter configured to be inserted into a cavity of a body of a living subject, and including an inflatable balloon comprising electrodes, the inflatable balloon being configured to press the electrodes against tissue of the cavity and at least partially block blood flow in the cavity, an ultrasound probe configured to provide velocity measurements of the blood flow in the cavity over time, a processor configured to assess a quality of contact of the electrodes with the tissue responsively to at least one of the velocity measurements of the blood flow in the cavity, and output an indication of the quality of contact to an output device, and a power supply configured to provide at least one electrical signal to the electrodes in order to ablate the tissue of the cavity.

A surgical instrument includes a housing having a shaft extending therefrom for supporting an end effector assembly. A handle is disposed on the housing and is selectively moveable relative thereto to actuate the end effector assembly. A PCB is disposed within the housing and includes one or more accelerometers and a timing circuit having a first timer. The accelerometer is configured to activate the first timer of the timing circuit upon detecting movement of the surgical instrument after the surgical instrument is coupled to an electrosurgical energy source. A deactivating assembly is disposed within the housing and is operably associated with the timing circuit such that after expiration of the first timer, the deactivation assembly mechanically decommissions the surgical instrument for continued or subsequent use.

Apparatus, consisting of a probe configured to be inserted into contact with a myocardium, and an electrode attached to the probe. A temperature sensor, incorporated in the probe, is configured to output a temperature signal. A pump irrigates the myocardium, via the probe, with an irrigation fluid at a controllable rate, and a radiofrequency (RF) signal generator applies RF power via the electrode to the myocardium, so as to ablate the myocardium. The apparatus also has processing circuitry that measures a temperature of the probe, based on the temperature signal, while the RF power is applied and, when the measured temperature exceeds a preset target temperature, iteratively reduces the RF power applied by the signal generator and concurrently iteratively varies a rate of irrigation of the irrigation fluid provided by the pump, until the measured temperature is reduced to the preset target temperature.