An energy module is disclosed. The energy module includes a control circuit and a two wire interface coupled to the control circuit. The two wire interface is configured as a power source and as a communication interface between the energy module and a neutral electrode.

A surgical instrument comprising a motor assembly, a shaft defining a shaft axis, a distal head, a rotary drive member, and a distal head lock member movable between a first position where the distal head is unlocked from the shaft and a second position where the distal head is locked to the shaft is disclosed. The motor assembly comprises a motor and a controller configured to operate the motor in first and second operating modes. The distal head comprises an end effector movable between an open configuration and a closed configuration. The distal head is rotated about the shaft axis when the distal head lock member is in the first position and the rotary drive member is actuated. The end effector is moved from the open configuration toward the closed configuration when the distal head lock member is in the second position and the rotary drive member is actuated.

An irreversible electroporation and radio frequency ablation (IRE/RFA) generator includes an IRE pulse generator, harmonic filtration circuitry, and a waveform interleaver. The IRE pulse generator is configured to generate biphasic IRE pulses. The harmonic filtration circuitry is configured to convert the IRE pulses into an RF signal. The waveform interleaver, which is configured to receive the IRE pulses and the RF signal and generate an output signal having a composition of the adapted IRE pulses having a final shape and repetition rate, the converted RF sinusoidal signal, or a combined IRE/RFA output signal, by switching between the received IRE square pulses and the received converted RF sinusoidal signal.

Various systems and methods for determining the state of an end effector of an ultrasonic surgical instrument are disclosed. A control circuit can be configured to measure a complex impedance of an ultrasonic electromechanical system including an ultrasonic blade and compare the measured complex impedance to reference complex impedance patterns that each correspond to a state of the end effector. Accordingly, the control circuit can further be configured to determine the state of the end effector according to which of the plurality of reference complex impedance patterns the measured complex impedance corresponds.

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 monopolar radio frequency waveform from the first direct current waveform; and a first controller configured to control the first radio frequency inverter to output the monopolar radio frequency waveform. The generator also includes a second radio frequency source having: a second power supply configured to output a second direct current waveform; a second radio frequency inverter coupled to the second power supply and configured to generate a bipolar radio frequency waveform simultaneously as the monopolar radio frequency waveform; and a second controller configured to control the second radio frequency inverter to output the bipolar radio frequency waveform.

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 radio frequency waveform from the first direct current waveform; and a first controller configured to control the first radio frequency inverter. The electrosurgical generator also includes a second radio frequency source having: a second power supply configured to output a second direct current waveform; a second radio frequency inverter coupled to the second power supply and configured to generate a second radio frequency waveform simultaneously as the first radio frequency waveform; and a second controller configured to control the second radio frequency inverter.

Various systems and methods for controlling an ultrasonic surgical instrument according to the location of tissue grasped within an end effector are disclosed. A control circuit can be configured to apply varying power levels, via a generator, to an ultrasonic transducer driving an ultrasonic electromechanical system to oscillate an ultrasonic blade. Further, the control circuit can measure impedances of the ultrasonic transducer corresponding to the varying power levels and determine a location of tissue positioned within the end effector according to a difference between the impedances of the ultrasonic transducer relative to a threshold.

The disclosure relates to variable power modular electronic systems for generating unipolar and bipolar electrical pulses and associated uses thereof. In an embodiment, such a system includes one or more pulse generators for generating electrical pulses that can be connected in series; a charging circuit for charging the pulse generators; and a controller communicatively coupled to the pulse generators and the charging circuit. Advantageously, each pulse generator may include an AC/DC rectifier and a DC/AC inverter connected to said AC/DC rectifier in a bridge configuration to generate bipolar output electrical pulses or pulse trains. In addition, the charging circuit may include a DC/DC step-up converter connected to an indirect DC/AC inverter. The system provided in various embodiments of the disclosure also provides a great versatility for adaptation to various applications and high output voltage and current values.

Methods, systems and devices for applying energy to tissue, and more particularly relates to a system for ablating or modifying structures in a body with systems and methods that generate a flow of vapor at a controlled flow rate for applying energy to the body structure.

Electrosurgical generator for providing a high-frequency alternating voltage to an electrosurgical instrument, including a control unit and an inverter for high voltage that generates a high-frequency alternating voltage fed to an output socket for the instrument. A detection unit is provided that includes a capacitive detector configured for detecting a capacitance of a plugged-in cable of the instrument. Thereby a parasitic capacitance induced by the instrument's cable can be detected. The capacitance is however low picofarad range and difficult to detect, further complicated by the requirement of galvanic separation for patient safety. However, the invention realized that just a qualitative detection is sufficient to determine whether the instrument's cable is being plugged in. The invention provides simple and efficient measurement circuit for such detection. Thereby, a safe and cost-effective plugging-in detection is realized.