An electrosurgery system includes a first generator configured to output an operating signal. The system also includes a pathway for the operating signal, the pathway includes an active electrode and a patient pad. The system also includes a circuit configured to measure a complex impedance of the patient pad. The circuit includes a second generator configured to output a measuring signal. The system also includes a voltage transformer, a current transformer, and a plurality of filters.

Methods and systems provide a body surface electrode, such as a patch, and, for example, a backpatch, which automatically detects detachment from the skin and/or proximity thereto, within a predetermined limit, and hence, the electrode coming out of contact with and/or proximity to the skin. Once the detachment is detected, the disclosed system instantaneously terminates pulse delivery to a pulse delivery electrode from an IRE generator, which generates the delivered pulses. By instantaneously terminating pulse delivery, damage to body tissues from overheating caused by pulses is minimized or eliminated.

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.

An ultrasonic device may include an electromechanical ultrasonic system that includes an ultrasonic transducer coupled to an ultrasonic blade. A method of delivering energy to the ultrasonic device may include sensing a vessel type in contact with the blade, determining that the vessel type is either a vein or an artery, and delivering power to the transducer based on the vessel type. Power may be applied to the transducer at a power level P that differs from a nominal power level Pn for a period T that differs from a nominal period Tn based on the vessel. The power level P may be lower than Pn for a period T that is longer than Tn when the vessel is a vein. Alternatively, the power level P my be greater than Pn for a period T that is shorter than Tn when the vessel is an artery.

Aspects of the present disclosure are presented for managing simultaneous outputs of surgical instruments. In some aspects, methods are presented for synchronizing the current frequencies. In some aspects, methods are presented for conducting duty cycling of energy outputs of two or more instruments. In some aspects, systems are presented for managing simultaneous monopolar outputs of two or more instruments, including providing a return pad that properly handles both monopolar outputs in some cases.

An active electrode probe for an enhanced control surgery system is disclosed. The probe has a flexible conductor for delivering electrosurgical energy during an electrosurgical procedure, and is adapted for connection to an electrosurgical generator. The probe also has a flexible electrical insulation substantially surrounding the conductor. The probe also has a flexible conductive shield substantially enclosing the electrical insulation, the flexible conductive shield electrically connected to a reference potential, whereby any current which flows in the flexible conductive shield from the conductor is conducted to the reference potential. The flexible conductive shield is formed from a conductive wire.

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.

An electrosurgical generator arranged to supply radio frequency (RF) energy to fuse tissue is provided. The generator is arranged to supply RF energy through a removably coupled electrosurgical instrument to fuse tissue grasped by the instrument. The generator monitors a phase angle of the supplied RF energy and adjusts or terminates the supplied RF energy based on the monitored phase angle in comparison to predetermined thresholds and conditions to optimally fuse the tissue. The electrosurgical instrument conducts radio frequency energy to fuse tissue captured between the jaws and a blade to mechanically cut tissue between the jaws. A conductive post positioned on the jaw adjacent to the blade.

An interactive control unit is disclosed. The interactive control unit includes an interactive touchscreen display, an interface configured to couple the control unit to a surgical hub, a processor, and a memory coupled to the processor. The memory stores instructions executable by the processor to receive input commands from the interactive touchscreen display located inside a sterile field and transmit the input commands to the surgical hub to control devices coupled to the surgical hub located outside the sterile field.

Transducer-based systems and methods may be configured to display a graphical representation of a transducer-based device, the graphical representation including graphical elements corresponding to transducers of the transducer-based device, and also including between graphical elements respectively associated with a set of the transducers and respectively associated with a region of space between the transducers of the transducer-based device. Selection of graphical elements and/or between graphical elements can cause activation of the set of transducers associated with the selected elements. Transducer activation characteristics, such as initiation time, activation duration, activation sequence, and energy delivery characteristics, can vary based on numerous factors. Visual characteristics of graphical elements and between graphical elements can change based on an activation-status of the corresponding transducers. Activation requests for a set of transducers can be denied if it is determined that a transducer in the set of transducers is unacceptable for activation.