An electrosurgical wand is provided and includes a handle and an elongate shaft coupled to the handle and extending distally from the handle along an axis. An active electrode is disposed at a distal end of the electrosurgical wand. A return electrode abuts the elongate shaft and extends along and annularly about the axis. The return electrode has a top side adjacent the active electrode and an opposite bottom side and defines a notch. A support member is disposed in the notch between the electrodes and transitions curvilinearly from the notch to define a front surface extending laterally across and axially from the return electrode. The front surface tapers downwardly from the active electrode to define a first portion defining a first convex outer surface and also extends toward the bottom side of the return electrode to define a second portion defining a second convex outer surface.

An arthroscopic system includes a hand piece with a motor drive. an elongate shaft assembly is detachably secured to a distal end of the hand piece, and the elongate shaft assembly includes an outer sleeve and an inner sleeve rotatably mounted in the outer sleeve. The inner sleeve couples to the motor drive when the elongate shaft assembly is attached to the hand piece, and an inner distal cutting window on the inner sleeve moves in and out of alignment with an outer distal cutting window on the outer sleeve as the motor drive rotates the inner sleeve. A distal electrode is disposed on an outer surface of the outer sleeve at a location opposite to that of the outer distal cutting window, and the outer sleeve member is rotatable relative to the hand piece when the hub is secured to the hand piece such that a user can hold the hand piece in one hand and rotate the outer sleeve to selectively place the outer distal cutting window or the distal electrode in an upward orientation relative to the user while continuing to hold the hand piece in the one hand.

An arthroscopic system includes a hand piece with a motor drive. an elongate shaft assembly is detachably secured to a distal end of the hand piece, and the elongate shaft assembly includes an outer sleeve and an inner sleeve rotatably mounted in the outer sleeve. The inner sleeve couples to the motor drive when the elongate shaft assembly is attached to the hand piece, and an inner distal cutting window on the inner sleeve moves in and out of alignment with an outer distal cutting window on the outer sleeve as the motor drive rotates the inner sleeve. A distal electrode is disposed on an outer surface of the outer sleeve at a location opposite to that of the outer distal cutting window, and the outer sleeve member is rotatable relative to the hand piece when the hub is secured to the hand piece such that a user can hold the hand piece in one hand and rotate the outer sleeve to selectively place the outer distal cutting window or the distal electrode in an upward orientation relative to the user while continuing to hold the hand piece in the one hand.

Disclosed are an extruded honeycomb catalyst, a process for preparing the catalyst, a method for reducing NOx in the exhaust gas from an internal combustion engine by using the catalyst, and a method for treatment of the emission gas generated from power plant comprising exposing the emission gas to the catalyst.

A medical device includes a shaft including a central lumen configured to direct a flow of fluid through the shaft, and an electrode positioned at a distal portion of the shaft. The electrode includes an electrode lumen in fluid communication with the central lumen, and the electrode lumen is configured to receive the flow of fluid from the central lumen. The electrode also includes one or more channels angled relative to the electrode lumen, and the one or more channels are in fluid communication with the electrode lumen to receive the flow of fluid from the electrode lumen. The one or more channels are configured to divert the flow of fluid from the electrode lumen toward one or more outlets laterally offset from the electrode lumen.

Control systems and methods for delivery of energy that may include control algorithms that prevent energy delivery if a fault is detected and may provide energy delivery to produce a substantially constant temperature at a delivery site. In some embodiments, the control systems and methods may be used to control the delivery of energy, such as radiofrequency energy, to body tissue, such as lung tissue.

An electrosurgical system comprising: a plurality of electrosurgical connection units, each electrosurgical connection unit comprising an input port connectable to an electrosurgical channel and an output port connectable to an electrosurgical instrument, the electrosurgical connection unit configured to connect the input port to the output port; an electrosurgical network comprising a plurality of electrosurgical links that connect the input ports of the electrosurgical connection units to an electrosurgical channel; and a control unit configured to: receive information from a device indicating that the device has detected an electrosurgical generator connected to the electrosurgical channel, the device being one of the electrosurgical connection units and an electrosurgical output device connected to the electrosurgical channel; determine a location of the electrosurgical generator in the electrosurgical network based on the received information; and transmit one or more control signals to the electrosurgical connection units and/or one or more electrosurgical output devices connected to the electrosurgical channel to cause the output port of a selected combination of electrosurgical connection units to be connected to the electrosurgical channel based on the determined location of the electrosurgical generator.

An electrosurgical system comprising: a plurality of electrosurgical connection units, each electrosurgical connection unit comprising an input port connectable to an electrosurgical channel and an output port connectable to an electrosurgical instrument, the electrosurgical connection unit configured to connect the input port to the output port; an electrosurgical network comprising a plurality of electrosurgical links that connect the input ports of the electrosurgical connection units to an electrosurgical channel; and a control unit configured to: receive information from a device indicating that the device has detected an electrosurgical generator connected to the electrosurgical channel, the device being one of the electrosurgical connection units and an electrosurgical output device connected to the electrosurgical channel; determine a location of the electrosurgical generator in the electrosurgical network based on the received information; and transmit one or more control signals to the electrosurgical connection units and/or one or more electrosurgical output devices connected to the electrosurgical channel to cause the output port of a selected combination of electrosurgical connection units to be connected to the electrosurgical channel based on the determined location of the electrosurgical generator.

Methods and systems for modulating intraosseous nerves (e.g., nerves within bone) are provided. For example, the methods and systems described herein may be used to modulate (e.g., denervate, ablate) basivertebral nerves within vertebrae. The modulation of the basivertebral nerves may facilitate treatment of chronic back pain. The modulation may be performed by a neuromodulation device an energy delivery device).

An electrode assembly for an electrosurgical pencil includes an insulative housing. A locking plate is supported at a distal end of the insulative housing about a pivot, the locking plate including a series of locking holes defined therein. A tip assembly is coupled to a distal end of the locking plate and is configured to treat tissue. A connection is coupled to a proximal end of the insulative housing and is electrically coupled to the tip assembly. One or more locking fingers is operably disposed within the housing and is movable between a first position allowing rotation of the locking plate and the tip assembly about the pivot and a second position preventing rotation of the locking plate and the tip assembly. The finger(s) is configured to engage a corresponding one of the series of locking holes to prevent rotation of the locking plate and the tip assembly.