Abstract: A computer system displays a view of a first portion of a three-dimensional environment and a first virtual object corresponding to a first computer-generated experience. While displaying the view of the first portion of the three-dimensional environment, the computer system detects a first input directed to the first virtual object meeting first criteria, and in response, starts a preview of a first portion of the first computer-generated experience. While displaying the preview, the computer system detects movement of the computer system relative to the surrounding environment, and in response displays a view of a second portion of the three-dimensional environment and a second portion of the preview of the first computer-generated experience. While displaying a portion of the preview of the first computer-generated experience, the computer system detects a second input meeting second criteria, and in response, displays a view of the first computer-generated experience.

Abstract: In some embodiments, an electronic device emphasizes and/or deemphasizes user interfaces based on the gaze of a user. In some embodiments, an electronic device defines levels of immersion for different user interfaces independently of one another. In some embodiments, an electronic device resumes display of a user interface at a previously-displayed level of immersion after (e.g., temporarily) reducing the level of immersion associated with the user interface. In some embodiments, an electronic device allows objects, people, and/or portions of an environment to be visible through a user interface displayed by the electronic device. In some embodiments, an electronic device reduces the level of immersion associated with a user interface based on characteristics of the electronic device and/or physical environment of the electronic device.

Abstract: A controller for an electrosurgical generator includes an RF inverter, a signal processor, a software compensator, a hardware compensator, and an RF inverter controller. The RF inverter generates an electrosurgical waveform and the signal processor outputs a measured value of at least one of a voltage, a current, or power of the electrosurgical waveform. The software compensator generates a desired value for at least one of the voltage, the current, or the power of the electrosurgical waveform, and the hardware compensator generates a phase shift based on the measured value and the desired value. The RF inverter controller generates a pulse-width modulation (PWM) signal based on the phase shift to control the RF inverter.

Abstract: A controller for an electrosurgical generator includes an RF inverter, a signal processor, a software compensator, a hardware compensator, and an RF inverter controller. The RF inverter generates an electrosurgical waveform and the signal processor outputs a measured value of at least one of a voltage, a current, or power of the electrosurgical waveform. The software compensator generates a desired value for at least one of the voltage, the current, or the power of the electrosurgical waveform, and the hardware compensator generates a phase shift based on the measured value and the desired value. The RF inverter controller generates a pulse-width modulation (PWM) signal based on the phase shift to control the RF inverter.

Abstract: The present disclosure includes an electrosurgical generator that controls treatment energy to be provided in a coagulation mode, where the treatment energy has an adjustable voltage ramp rate which can be set to a ramp rate in a range of voltage ramp rates. The generator receives signals from an instrument over time relating to load impedance. When the load impedance is above a threshold, the generator sets the adjustable voltage ramp rate to a ramp rate in the range of voltage ramp rates, and decreases, at the adjustable voltage ramp rate, a voltage of the treatment energy. When the load impedance is below the threshold, the generator sets the adjustable voltage ramp rate to a ramp rate in the range of voltage ramp rates, and increases, at the adjustable voltage ramp rate, the voltage of the treatment energy.

Abstract: The present disclosure includes an electrosurgical generator that controls treatment energy to be provided in a coagulation mode, where the treatment energy has an adjustable voltage ramp rate which can be set to a ramp rate in a range of voltage ramp rates. The generator receives signals from an instrument over time relating to load impedance. When the load impedance is above a threshold, the generator sets the adjustable voltage ramp rate to a ramp rate in the range of voltage ramp rates, and decreases, at the adjustable voltage ramp rate, a voltage of the treatment energy. When the load impedance is below the threshold, the generator sets the adjustable voltage ramp rate to a ramp rate in the range of voltage ramp rates, and increases, at the adjustable voltage ramp rate, the voltage of the treatment energy.

Abstract: Methods and system are provided to mitigate RF interferences during operation of an electrosurgical system. An electrosurgical system configured to output therapeutic RF energy may refrain from outputting RF energy in order to measure an RF interference for a group of candidate frequencies, and to select a frequency from the group of candidate frequencies for which the measured RF interference is below a threshold value, and to produce a feedback signal (a control signal) at the selected frequency to control operation of the electrosurgical system. During operation of the electrosurgical system the feedback signal may be filtered by a BPF whose fundamental frequency is set to the selected frequency, to thus obtain an interference free feedback signal and, consequently, a reliable control of the electrosurgical system.

Abstract: An electrosurgical system including or connected to an output circuitry comprising an electrosurgical device and an electrical cable is modeled during a cable interrogation phase using a transfer matrix in order to determine a leakage capacitance in the electrosurgical system. After the leakage capacitance is assigned or set to a virtual capacitor in the transfer matrix, an output parameter of the electrosurgical system, such as output voltage, output current, output impedance or output electrical power, may be determined by applying an actual input voltage to the output circuitry and measuring a resulting input current, and multiplying the input voltage and measured current by the transfer matrix.

Abstract: An electrosurgical system including or connected to an output circuitry comprising an electrosurgical device and an electrical cable is modelled during a cable interrogation phase using a transfer matrix in order to determine a leakage capacitance in the electrosurgical system. After the leakage capacitance is assigned or set to a virtual capacitor in the transfer matrix, an output parameter of the electrosurgical system, such as output voltage, output current, output impedance or output electrical power, may be determined by applying an actual input voltage to the output circuitry and measuring a resulting input current, and multiplying the input voltage and measured current by the transfer matrix.

Abstract: 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.

Abstract: An electrosurgical device includes jaw members, a thermal cutting element coupled to one of the jaw members. When the jaw members are in an approximated position, power is delivered to the thermal cutting element to maintain the temperature of the thermal cutting element at an operating temperature for cutting sealed tissue grasped between the jaw members. When the jaw members are in the spaced apart position, power is delivered to the thermal cutting element to maintain the temperature of the thermal cutting element at a standby setpoint temperature. In response to a determination of contact between tissue and the thermal cutting element when the jaw members are in the spaced apart position, power is delivered to the thermal cutting element to increase the temperature of the thermal cutting element from the standby setpoint temperature to a cutting setpoint temperature for dissecting tissue.

Abstract: An electrosurgical system includes jaw members having a cutting element extending therebetween and a generator configured to: provide minimal power to the cutting element to maintain a pre-dissection temperature thereof; sense a change in resistance of the cutting element and ramp up power to a dissection temperature; regulate the temperature of the cutting element by regulating power; and terminate power to the cutting element to allow the cutting element to cool to the pre-dissection temperature before providing power back to the cutting element.

Abstract: The disclosed systems and methods relate to controlling the application of electrosurgical energy by an electrosurgical instrument. An electrosurgical generator in accordance with the present disclosure includes a processor and a memory storing instructions executable by the processor. The instructions when executed, cause the generator to receive signals from the instrument over time relating to whether tissue is grasped by the instrument, receive an indication to provide an indicated treatment power to the instrument where the indicated treatment power is set by a user, determine based on the signals that tissue is currently grasped and that, for at least a predetermined length of time prior, no tissue had been grasped, and based on the determination, provide a treatment power surge to the instrument for a surge time period. After the surge time period, the generator provides the indicated treatment power to the instrument.

Abstract: A controller for an electrosurgical generator includes an RF inverter, a signal processor, a software compensator, a hardware compensator, and an RF inverter controller. The RF inverter generates an electrosurgical waveform and the signal processor outputs a measured value of at least one of a voltage, a current, or power of the electrosurgical waveform. The software compensator generates a desired value for at least one of the voltage, the current, or the power of the electrosurgical waveform, and the hardware compensator generates a phase shift based on the measured value and the desired value. The RF inverter controller generates a pulse-width modulation (PWM) signal based on the phase shift to control the RF inverter.

Abstract: An electrosurgical generator includes a first radio frequency source having a first power supply configured to output a first direct current waveform; a first radio frequency inverter coupled to the first power supply and configured to generate a first interrogation waveform and a first radio frequency waveform from the first direct current waveform; and a first controller configured to control the first radio frequency inverter to output the first radio frequency waveform based on a response of the first interrogation waveform.

Abstract: The present disclosure relates to electrosurgical systems and methods for controlling electrical treatment energy in connection with electrical arcs. A method in accordance with the present disclosure includes providing electrical treatment energy to an instrument based on an indicated electrical energy level, accessing voltage signal values over time relating to voltage of the electrical treatment energy and/or current signal values over time relating to current of the electrical treatment energy, determining whether an arc generated by the instrument is an arc to be maintained or an arc to be extinguished based on a threshold value and at least one of the voltage signal values or the current signal values, and controlling the electrical treatment energy based on determining that the arc is an arc to be extinguished.

Abstract: The disclosed systems and methods relate to detecting coupling or uncoupling of an external cable from an output port of an electrosurgical generator when a cable detection switch is unavailable or inoperable. The electrosurgical generator includes internal cabling having a first end portion connected to the output port and a second end portion. The disclosed technology includes supplying power from the electrosurgical generator, measuring current and voltage at the second end portion of the internal cabling within the electrosurgical generator, accessing one or more parameters associated with internal cable compensation corresponding to the internal cabling within the electrosurgical generator, and determining coupling or uncoupling of an external cable from the output port based on the measured current, the measured voltage, and the one or more parameters associated with internal cable compensation.

Abstract: In accordance with aspects of the present disclosure, an adaptor assembly includes a plug, a selector assembly, and a connector. The plug is coupled to an electrosurgical generator and is configured to receive electrosurgical energy from the electrosurgical generator. The selector assembly includes a first position and a second position. The first position is configured to indicate a first setting of the electrosurgical generator. The second position is configured to indicate a second setting of the electrosurgical generator. The selector assembly, when actuated, indicates the selected position to the electrosurgical generator to initiate the corresponding setting. The connector is configured to couple to a surgical instrument and convey the electrosurgical energy to the surgical instrument. The electrosurgical energy, when based on the first setting, is different from the electrosurgical energy, when based on the second setting.

Abstract: A controller for an electrosurgical generator includes an RF inverter, a signal processor, a software compensator, a hardware compensator, and an RF inverter controller. The RF inverter generates an electrosurgical waveform and the signal processor outputs a measured value of at least one of a voltage, a current, or power of the electrosurgical waveform. The software compensator generates a desired value for at least one of the voltage, the current, or the power of the electrosurgical waveform, and the hardware compensator generates a phase shift based on the measured value and the desired value. The RF inverter controller generates a pulse-width modulation (PWM) signal based on the phase shift to control the RF inverter.

Abstract: The present disclosure relates to electrosurgical systems and methods for controlling electrical treatment energy in connection with electrical arcs. A method in accordance with the present disclosure includes providing electrical treatment energy to an instrument based on an indicated electrical energy level, accessing voltage signal values over time relating to voltage of the electrical treatment energy and/or current signal values over time relating to current of the electrical treatment energy, determining whether an arc generated by the instrument is an arc to be maintained or an arc to be extinguished based on a threshold value and at least one of the voltage signal values or the current signal values, and controlling the electrical treatment energy based on determining that the arc is an arc to be extinguished.