Techniques for detecting leakage current of an electrosurgical instrument are provided. In an example, a method of operating an electrosurgical instrument can include applying a radio frequency (RF) signal to electrode conductors of the electrosurgical instrument, determining leakage current of an leakage conductor coupled to the electrosurgical instrument exceeds a first threshold, and providing a first indication in response to the determining the leakage current of the leakage conductor exceeds the first threshold.

Techniques for monitoring control points of a computer-assisted device include one or more articulated arms having one or more control points and a control unit coupled to the one or more articulated arms. Each control point of the one or more control points is located based on a kinematic configuration of the one or more articulated arms. The control unit is configured to determine, during a movement of a table that causes a change in the kinematic configuration of the one or more articulated arms, an actual spatial configuration of the one or more control points; determine, based on a comparison of the actual spatial configuration with an expected spatial configuration of the one or more control points, whether to perform a remedial action; and perform the remedial action in response to a determination to perform the remedial action.

A system for treatment of a target region of lung tissue including: a flow regulator configured to be interposed between a conductive fluid source and a conductive fluid outlet at a distal region of a catheter positioned in the target region and the conductive fluid outlet is positionable at or in proximity of the target region of lung tissue, wherein the flow regulator being further configured to control a flow rate or a bolus quantity of the conductive fluid coming from the fluid source and delivered through the conductive fluid outlet to the target region; an ablation electrode mounted to the distal region of the catheter; a controller configured to control the flow regulator, and configured to control power delivered from an ablation energy source to the ablation electrode, wherein the controller is configured to: receive one or more of the values of the control parameter; control the delivery of power from the ablation energy source to the ablation electrode; while the power is delivered to the ablation electrode, maintain a temperature in the target region within a first temperature range by controlling the flow regulator to adjust the flow of the conductive fluid delivered to the conductive fluid outlet; determine an amount of the conductive fluid delivered to the conductive fluid output; in response to the amount of the conductive fluid reaching a threshold volume, ceasing the flow of the conductive fluid to the conductive fluid output; during the cessation of the flow of the conductive fluid to the conductive fluid output, maintain the temperature in the target region within a second temperature range by adjusting the power delivered to ablation electrode.

An electrosurgical generator for operating an electrosurgical instrument, wherein the electrosurgical generator includes a data storage device coupled to the control device for storing a warning time and a switch-off time, the warning and switch-off time each being assigned to a detected instrument in order to assign an instrument-specific warning and switch-off time to each detected instrument, a time tracking device for determining an instrument-specific activation duration, wherein the activation duration is a duration of time detected from a first connection or first activation of an electrosurgical instrument connected to the instrument terminal to an actual time value, and wherein an activation duration is detected for each detected instrument, and the activation duration is recorded continuously and independently of the electrosurgical instrument operating state, and the control device triggers warning indication by triggering the signaling device when the determined activation duration exceeds the instrument-specific warning time of the connected instrument.

Systems and methods for forming a lesion on an endocardial tissue of a patient's heart involve placing an ablation assembly inside of the heart and adjacent to the endocardial tissue, and placing a guiding assembly outside of the heart. An ablation assembly includes an ablation element and a first attraction element, and a guiding assembly includes a second attraction element. First and second attraction elements can be attracted via magnetism. Techniques involve forming an ablation on the cardiac tissue of a patient's heart with an ablation element of the ablation assembly. Optionally, techniques may include moving the second attraction element of the guiding assembly relative to the patient's heart, so as to effect a corresponding movement of the ablation element of the ablation assembly.

A method for destroying a cancerous tumor. The method includes putting two electrodes of an electrical probe in contact with a portion of the cancerous tumor, plotting an impedance phase diagram by measuring a set of electrical impedance phase values from the portion of the cancerous tumor at end of a respective set of pre-determined time steps, destroying cancer cells of the portion of the cancerous tumor within each time step of the respective set of pre-determined time steps by electrolyzing peripheral medium surrounding the cancer cells of the portion of the cancerous tumor by applying a direct current (DC) voltage between the two electrodes, and stopping destroying of the cancer cells responsive to a complete destruction of the portion of the cancerous tumor, where the complete destruction includes obtaining a positive slope of the impedance phase diagram (IPS).

A method for real-time and in-vivo detecting cancerous status of a suspected mass to in a living body. The method includes putting two electrodes of an electrical probe in contact with the suspected mass, recording an electrical impedance spectroscopy (EIS) from the suspected mass utilizing an impedance analyzer device connected to the electrical probe by plotting an impedance phase diagram respective to a swept range of frequencies while applying an alternating current (AC) voltage between the two electrodes, calculating an impedance phase slope (IPS) of the plotted impedance phase diagram in a frequency range between 100 kHz and 500 kHz, and detecting cancerous status of the suspected mass based on the calculated IPS. Detecting cancerous status of the suspected mass based on the calculated IPS includes detecting the suspected mass is a cancerous mass or a precancerous mass if the calculated IPS is less than a reference IPS.

A surgical instrument comprises a shaft assembly comprising a shaft and an end effector coupled to a distal end of the shaft; a handle assembly coupled to a proximal end of the shaft; a battery assembly coupled to the handle assembly; a radio frequency (RF) energy output powered by the battery assembly and configured to apply RF energy to a tissue; an ultrasonic energy output powered by the battery assembly and configured to apply ultrasonic energy to the tissue; and a controller configured to, based at least in part on a measured tissue characteristic, start application of RF energy by the RF energy output or application of ultrasonic energy by the ultrasonic energy output at a first time.

A surgical instrument includes a handle assembly; a shaft assembly and an end effector. The shaft assembly includes an exterior shaft, a first clutch positioned within the exterior shaft to drive a first function of the surgical instrument when engaged. A second clutch within the exterior shaft to drive a second function when engaged. A rotary driver is positioned within the exterior shaft and configured to rotate within the exterior shaft. The rotary driver includes a first clutch engagement mechanism to engage the first clutch and a second clutch engagement mechanism configured to engage the second clutch independent of the first clutch engagement mechanism engaging the first clutch, such that, at different times both the first clutch and the second clutch are engaged simultaneously only the first clutch is engaged only the second clutch is engaged and neither the first clutch nor the second clutch is engaged simultaneously.

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.