A system and method of controlling the application of energy to tissue using measurements of impedance are described. The impedance, correlated to the temperature, may be set at a desired level, such as a percentage of initial impedance. The set impedance may be a function of the initial impedance, the size and spacing of the electrodes, the size of a targeted passageway, and so on. The set impedance may then be entered into a PID algorithm or other control loop algorithm in order to extract a power to be applied to a treatment device.

In an energy control device, a processor detects a gradual decrease start time at which the electric characteristic value in relation to electric energy output to an ultrasonic transducer starts a gradual decrease after a gradual increase. The processor calculates a difference value by subtracting the electric characteristic value from a peak value at gradual decrease start time and calculates an integrated value of the difference value from the gradual decrease start time. The processor executes, based on a fact that the integrated value become greater than a predetermined threshold, at least one of causing to stop or reduce the output of the electric energy to the ultrasonic transducer, and notifying that the integrated value become greater than the predetermined threshold.

Examples described herein may include medical devices and electrosurgical generators with resonant isolated transformers to perform filtering and gain functions. An example electrosurgical generator includes a radio frequency (RF) inverter stage configured to receive an input signal and, in response to control feedback signals, to provide an output signal that provides power to a load. The RF inverter stage includes a resonant isolated transformer configured to receive the input signal and to provide gain and filtering adjustments to the input signal to provide the output signal.

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.

The subject of this disclosure is devices, systems, and uses thereof to treat a plurality of patients for paroxysmal atrial fibrillation. The solution can include delivering a multi-electrode radiofrequency balloon catheter and a multi-electrode diagnostic catheter to one or more targeted pulmonary veins; ablating tissue of the one or more targeted pulmonary veins using the multi-electrode radiofrequency balloon catheter; diagnosing the one or more targeted pulmonary veins using the multi-electrode diagnostic catheter; and achieving at least one of a predetermined clinical effectiveness and acute effectiveness of the method or use based on use of the multi-electrode radiofrequency balloon catheter and the multi-electrode diagnostic catheter in the isolation of the one or more targeted pulmonary veins.

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.

This invention relates to electrosurgical systems for coagulation and ablation of tissue, including in relation to tissue biopsy.

A method for adjusting the operation of a surgical instrument using machine learning in a surgical suite is disclosed.

Provided herein is a multifunctional aesthetic system including a housing, an electromagnetic array situated in the housing and having one or more electromagnetic radiation (EMR) sources, a controller in electronic communication with the array to operate the one or more of the EMR sources to direct the EMR beam to a treatment area, and one or more sensors in electronic communication with the controller for providing feedback to the controller based on defined parameters to allow the controller to adjust at least one operating condition of the multifunctional system in response to the feedback.

Disclosed are various examples and embodiments of a Nitinol basket for an electrophysiological (EP) mapping catheter. In one embodiment, the Nitinol basket comprises a plurality of basket splines, each basket spline having a distalmost portion and a proximal end, where the distal tip is uninterruptedly contiguous and continuous with the distalmost portions of the basket splines and formed from the same piece, slab or ingot comprising Nitinol as the splines. In such an embodiment, the basket splines and distal tip are cut and formed from a same single length or piece of Nitinol tubing or a Nitinol hypotube. The respective distal portions of each of the Nitinol splines can be continuous and contiguous with, and connected to, the Nitinol distal tip, each spline being configured to extend outwardly away from an imaginary central axis of the Nitinol basket and its proximal end and distal portion to form a curved shape therebetween when the Nitinol basket is in an undeformed and deployed state. The splines can be configured to be spaced approximately equal distances apart from one another when the Nitinol basket is in an undeformed and deployed state, and the can be configured collectively to form a basket shape when the Nitinol basket is in an undeformed, expanded and deployed state.