An electrode assembly for an electrosurgical instrument includes a housing configured to operably receive a distal end of an electrosurgical instrument shaft, the housing encapsulating an insulative core sandwiched between a pair of return electrodes. The insulative core includes a slot defined about a periphery thereof configured to partially receive an active electrode. The active electrode and the pair of return electrodes are adapted to connect to opposite polarities of an electrosurgical generator. A tensioning mechanism is configured to tension the active electrode about the insulative core during assembly.

Disclosed are a method and apparatus for safety control of radio frequency operation, and a radio frequency host. The method includes: when connecting ends of a plurality of radio frequency circuits connect an operated object to a radio frequency host, acquiring detection values of the plurality of radio frequency circuits; determining whether change amounts of the detection values reach a preset value range; when a number of target radio frequency circuits reaching the preset value range is not less than a preset number, selecting the preset number of target radio frequency circuits from the target radio frequency circuits according to a preset selection rule as radio frequency input circuits, and inputting radio frequency energy into the radio frequency input circuits; when the number of target radio frequency circuits reaching the preset value range is less than the preset number, not inputting radio frequency energy into any radio frequency circuit.

A bone tumor surgery device according to an embodiment of the present invention comprises: an accommodation container in which an accommodation space for accommodating a bone of a patient is formed; and a radiofrequency supply unit for supplying radiofrequency into the accommodation space.

A bone tumor surgery device according to an embodiment of the present invention comprises: an accommodation container in which an accommodation space for accommodating a bone of a patient is formed; and a radiofrequency supply unit for supplying radiofrequency into the accommodation space.

An electrosurgical generator having an oscillating circuit that is excited by an excitation circuit with a frequency preferably close to the resonance frequency of the oscillating circuit. A regeneration circuit, which may be a voltage multiplier circuit, is used to stop the oscillation as suddenly as possible without losing the energy stored in the oscillating circuit.

A system and method of use thereof are disclosed, the system including a treatment source, such as an electrosurgical generator and a plurality of treatment devices operable to be coupled to the treatment source, one or more of the treatment devices being associated with one or more device identifiers which can be, for example, physically present on the device or contained in device software.

The present invention relates to systems for use for radio frequency ablation. The systems can include one or more of an ablation tool, power source for use with the ablation tool and a backstop for use in conjunction with the ablation tool during surgical procedures. Preferred ablation tools comprise a series of three or more blade-shaped electrodes disposed in a linear, curved, curvilinear or circular array. The backstops are useful for reducing direct physical and thermal heat transfer injuries to the patient or surgeon during procedures using radiofrequency (RF) ablation devices.

Systems, methods, and instrumentalities are disclosed for switching a control scheme to control a set of system modules and/or modular devices of a surgical hub. A surgical hub may determine a first control scheme that is configured to control a set of system modules and/or modular devices. The surgical hub may receive an input from one of the set of modules or a device located in an OR. The surgical hub may make a determination that at least one of a safety status level or an overload status level of the surgical hub is higher than its threshold value. Based on at least the received input and the determination, the surgical hub may determine a second control scheme to be used to control the set of system modules. The surgical hub may send a control program indicating the second control scheme to one or more system modules and/or modular devices.

At least some embodiments of the present disclosures are directed to a hybrid electroporation ablation catheter. In some embodiments, the hybrid electroporation ablation catheter comprises a catheter shaft having a proximal end and an opposite distal end and an electrode assembly extending from the distal end of the catheter shaft and the electrode assembly comprising a plurality of energy-delivering electrodes. The electrode assembly is configured to be selectively operable in a plurality of different operation modes.

A system is configured to delivering radiofrequency power to the endometrial lining tissue of a uterine cavity, including modulating the delivered power so that a measured impedance of the endometrial lining tissue tracks a target impedance as a function of time, wherein the target tissue impedance is derived from a function that approximates a preferred endometrial lining tissue ablation impedance curve that is determined based upon a measured impedance of the endometrial lining tissue after RF power has been delivered for a predetermined initial time period.