A radio-frequency ablation catheter comprises a handle having a proximal end and a distal end, an outer tube assembly having a proximal end and a distal end, and an inner tube assembly having a proximal end and a distal end; the proximal end of the outer tube assembly is connected to the distal end of the handle; the proximal end of the inner tube assembly is connected to the distal end of the handle; the inner tube assembly can be driven by the handle to rotate relative to the outer tube assembly; the inner tube assembly comprises a branch electrode assembly, and the branch electrode assembly comprises a plurality of branch electrodes distributed at intervals in the circumferential direction. The branch electrode assembly of the radio-frequency ablation catheter and the radio-frequency ablation system can rotate relative to the outer tube assembly to avoid blood vessels.

An ultrapolar electrosurgery blade and an ultrapolar electrosurgery pencil. The ultrapolar electrosurgery blade has a non-conductive planar member with opposing planar sides, a cutting end, and an opposite non-cutting end, first active and return electrodes located on one opposing planar side, and second active and return electrodes located on the other opposing planar side.

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.

Disclosed are various examples and embodiments of systems, devices, components and methods configured to estimate the action potential wave propagation in a patient's heart, and subsequently to detect at least one location or type of at least one source of, or rotational phenomenon associated with, at least one cardiac rhythm disorder using intracardiac electrodes and a modified multi-frame Horn-Schunck algorithm to generate a map corresponding to a spatial map, the map being configured to reveal on a monitor or display to a user the at least one location of the at least one source of the at least one cardiac rhythm disorder.

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.

An ablation instrument comprises an elongate shaft having a cannula channel and a scope channel, and an electrode disposed in the cannula channel. The electrode is slidable between a first position in which a distal end of the electrode is contained within the cannula channel, and a second position in which the distal end of the electrode extends out of a distal opening of the cannula channel. The ablation instrument further comprises a distal head coupled to the elongate shaft and configured for engaging tissue.

A blood vessel dissecting device is disclosed, which includes at least two dissecting devices, which are inserted into a living body along a blood vessel to dissect tissue in a direction of alignment thereof with the blood vessel. The at least two dissecting devices include a first dissecting device and a second dissecting device. The first dissecting device and the second dissecting device are disposed juxtaposedly in the living body, and a branch vessel branched from the blood vessel is located between the first dissecting device and the second dissecting device.

A medical system may comprise a catheter (101) for ablating tissue including a flexible longitudinal body including a distal end; and a distal portion extending distally from the distal end of longitudinal body. The distal portion may include a plurality of electrodes (103). The medical system may also comprise one or more control units (112) coupled to the catheter and configured to (1) control a supply of electrical energy to each of the plurality of electrodes and (2) automatically control a position of the distal portion of the catheter.

A surgical instrument end effector assembly includes a first jaw member and a second jaw member. The second jaw member includes an ultrasonic blade body and first and second electrodes disposed on either side of the ultrasonic blade body and extending longitudinally along a majority of a length of the ultrasonic blade body. The ultrasonic blade body is adapted to receive ultrasonic energy from an ultrasonic waveguide. The first and second electrodes taper in width proximally to distally and are adapted to connect to a source of electrosurgical energy. The first jaw member is movable relative to the second jaw member between a spaced-apart position and an approximated position for grasping tissue therebetween.

A blood vessel dissecting device is disclosed, which includes a dissecting device which, when being inserted into a living body along a blood vessel, dissects tissue in a direction of alignment thereof with the blood vessel, and a cutting device which, when being inserted into the living body along the blood vessel, cuts tissue surrounding the blood vessel in a direction of alignment thereof with the blood vessel. The cutting device includes a main body section which is inserted into the living body and holds the tissue between itself and the dissecting device, and a cutting section which cuts the tissue held between the main body section and the dissecting device.