41 results about "Monopolar electrosurgery" patented technology

An electrosurgical system is disclosed comprising a generator configured to electrosurgical coagulation waveforms. The generator includes a closed loop control system for controlling the electrosurgical coagulation waveforms. The closed loop control system includes a sensor configured to sense a tissue property and / or an energy property and to transmit the tissue property and / or the energy property as one or more sensor signals having an amplitude. The control system also includes a gain controller configured to process the at least one sensor signal to reduce the amplitude of the sensor signals and to obtain a signal to noise ratio of the at sensor signals within a predetermine range. A microprocessor coupled to the generator and is configured to adjust the electrosurgical coagulation waveforms as a function of the sensor signals.

An electrosurgical system is disclosed comprising a generator configured to electrosurgical coagulation waveforms. The generator includes a closed loop control system for controlling the electrosurgical coagulation waveforms. The closed loop control system includes a sensor configured to sense a tissue property and / or an energy property and to transmit the tissue property and / or the energy property as one or more sensor signals having an amplitude. The control system also includes a gain controller configured to process the at least one sensor signal to reduce the amplitude of the sensor signals and to obtain a signal to noise ratio of the at sensor signals within a predetermine range. A microprocessor coupled to the generator and is configured to adjust the electrosurgical coagulation waveforms as a function of the sensor signals.

A surgical instrument for use with a robotic surgical system is described. The instrument includes an elongate shaft having a proximal end and a distal end. An electrically live wrist member is disposed at the distal end of the shaft. An electrocautery end effector is mounted to the wrist member. An interface is disposed at the proximal end of the shaft. The interface is removably connectable to the robotic surgical system. A conductor extends from the interface to the end effector so as to deliver electrical energy to tissue engaged by the end effector. A tip cover is disposed over the wrist member so that electrical current can only be conducted to tissues through the exposed end effector (e.g., to promote blood coagulation during usage) and not to other parts of the patient's body.

Methods and apparatus for delivering, monitoring, balancing, and / or dispersing high-frequency current flow in monopolar electrosurgery. The methods generally include positioning an active electrode in or on target tissue, positioning at least two dispersive electrodes on tissue remote from the target tissue, establishing electrical current flow from the active electrode through the dispersive electrodes, and individually adjusting the current through at least one of the dispersive electrodes to balance the current through the dispersive electrodes. By adjusting and balancing the current through two or more dispersive electrodes, safety of electrosurgical systems may be enhanced by preventing unwanted patient burns.

An electrical switching system for use in various types of electrosurgical instruments and related tools comprises a system adapted to automatically determine which of at least two electrical current modes to deliver through an electrosurgical instrument based on a condition sensed by the electrosurgical instrument. In another embodiment, the electrical switching system comprises a generator, the generator including a first electrical distribution systems for delivering monopolar electrical energy, and a second electrical distribution system for delivering bipolar electrical energy, a controller coupled to the generator for selecting based on an input which of the first and second electrical distribution systems to activate.

A disposable or reusable surgical laser handpiece having an extendable and retractable active laser fiber tip and housed in a body comprising an actuating handle for use in various surgical laser procedures. The fiber tip when extended can be given a specific configuration by associating the fiber with a shaped memory member. The housing can also be constructed to incorporate bipolar or unipolar electrosurgical electrodes.

A combination argon plasma coagulation (APC) and monopolar electrosurgical device and method are shown. An electrosurgical tool such as a spatula, hook, ball, or the like has a neck and a plurality of members biased to an open position. The electrosurgical tool is connected to the shaft having a channel therein for accommodating an APC probe. A collet is placed on the shaft and is provided with a mechanism such as threads to permit movement of the collet with respect to the shaft. Such movement causes the plurality of members of the surgical tool to move being open and closed positions.

Methods and apparatus for delivering, monitoring, balancing, and / or dispersing high-frequency current flow in monopolar electrosurgery. The methods generally include positioning an active electrode in or on target tissue, positioning at least two dispersive electrodes on tissue remote from the target tissue, establishing electrical current flow from the active electrode through the dispersive electrodes, and individually adjusting the current through at least one of the dispersive electrodes to balance the current through the dispersive electrodes. By adjusting and balancing the current through two or more dispersive electrodes, safety of electrosurgical systems may be enhanced by preventing unwanted patient burns.

A unipolar electrosurgical electrode or probe that is configured for use in MIS electrosurgical procedures. The electrosurgical electrode comprises a long, thin, flexible, insulated wire configured to cooperate with the small cannula of a mini-endoscope to reach interior tissue not normally reachable by electrosurgical electrodes. When energized, a unipolar discharge is generated at the working end of the electrode. The probe can be used for spinal and endonasal procedures.

A combination argon plasma coagulation (APC) and monopolar electrosurgical device and method are shown. An electrosurgical tool such as a spatula, hook, ball, or the like has a neck and a plurality of members biased to an open position. The electrosurgical tool is connected to the shaft having a channel therein for accommodating an APC probe. A collet is placed on the shaft and is provided with a mechanism such as threads to permit movement of the collet with respect to the shaft. Such movement causes the plurality of members of the surgical tool to move being open and closed positions.

A disposable or reusable bipolar or unipolar electrosurgical handpiece having an extendable and retractable active electrode end and housed in a relatively inexpensive body comprising an actuating handle for use in various electrosurgical procedures. The housing comprises slidable body sections with one of the sections having an internal structure configured for receiving an incoming wire whose stripped end or ends can be contacted to the active electrode end by way of an externally-exposed electrically-conductive band on the electrode.

Systems, devices, and methods for electrosurgery wherein a circuit bridge is created for a monopolar electrosurgical circuit that provides a matched impedance to load condition thereby joining the active (working) and return (reference) electrode leads into a single bipolar mode device.

A bipolar electrosurgical instrument when connected to an electrosurgical generator is particularly suited for performing laparoscopic procedures such as LASH. The instrument has a hollow shaft sized to fit through a laparoscopic port and a proximal end and a distal end, a loop electrode constituted by an electrically conductive resilient looped wire provided with a first component for reciprocating the loop electrode between a retracted position inside the hollow shaft to a second position in which at least a part of the loop electrode is emerged from the distal end of the hollow shaft, and at least two return electrodes provided with a second component for reciprocating the at least two return electrodes between a retracted position inside the hollow shaft to a second position in which at least a part of the return electrodes are emerged from the distal end of the hollow shaft, a third component for measuring the impedance, resistance or capacity in an object between the at least two return electrodes, and a fourth component for applying power to the loop electrode when the value of the impedance, resistance or capacity is below a predetermined value and / or in a predetermined period of time. Use of the instrument reduces surgical time and is safer than known bipolar and monopolar electrosurgical instruments.

A monopolar electrosurgical instrument including a pair of diverging shanks with a pair of uninsulated tips formed respectively on the distal ends thereof, a housing secured to one of the shanks and having a button disposed therein, a metal wire extending adjacent the one shank so that depression of the button bends the metal rod to energize the instrument.

Embodiments are directed to various monopolar and bipolar electrosurgical scissor instruments. A monopolar electrosurgical scissor instrument includes one scissor blade that has an electrically conductive tapered edge, where the tapered edge is insufficiently sharp to shear or otherwise mechanically cut tissue. The scissors also include another electrically insulated scissor blade movably mounted to the first scissor blade. The second scissor blade includes a flat contact surface that is aligned with the tapered edge of the first scissor blade. The scissors further include a scissor body that includes a conductor that transfers electrical energy from an energy source to the tapered edge of the first electrically conductive scissor blade to electrically cut interlaying tissue located between the first electrically conductive scissor blade and the second electrically insulated scissor blade.

A monopolar electrosurgical instrument comprising a cylindrical metallic electrode which is connected to one pole of a radio frequency generator on one extreme; said electrode comprising a liquid supply for cooling, a handle 7 that covers part of the electrode, a part 6 covered with an insulative material, and a coagulating and cutting uninsulated tip; said tip comprising a round ending part 2, a part 3 attached to a cutting metal blade 5 near the end, and a part 4 non-attached to a cutting metal blade. It is useful for precisely cut the tissue that it is previously coagulated, using a single instrument, and avoiding risk of bleeding.

Electrosurgery blades including electrosurgery blade assemblies having argon beam capability. The electrosurgery blade includes a thin conductive member having a lead sharp cutting end and an opposite noon-cutting end and a non-conductive coating covering the thin conductive member such that at least a portion of the lead cutting end and at least a portion of the opposite non-cutting end of the thin conductive member remain exposed. An electrosurgery blade assembly having argon beam capability includes the previously described electrosurgery blade, a non-conductive tube member having a hollow tubular shaped opening positioned on top of the electrosurgery blade, and a conductive hollow tubular member contained within at least a portion of the non-conductive tube member.

Electrosurgery blades including electrosurgery blade assemblies having argon beam capability. The electrosurgery blade includes a non-conductive planar member having opposite planar sides with a bottom angled sharp cutting edge, and a conductive layer located on one or both of the opposing planar sides of the non-conductive planar member where the conductive layer lies adjacent to the angled sharp cutting edge of the non-conductive planar member without covering the angled sharp cutting edge. In embodiments of the electrosurgery blade assemblies having argon beam capability, the electrosurgery blade assembly includes a non-conductive tube member having a hollow tubular shaped opening and a slot where at least a portion of the conductive layer of the electrosurgery blade is positioned within the slot of the non-conductive tube member.

The present invention provides a device for monopolar electrosurgery that comprises two parallel spaced active cutting electrodes. The two active electrodes provide simultaneous, parallel or concentric surgical cuts, one cut around the target tissue and the second cut defining the surgical tissue margin. The distance between the two active electrodes provides a relatively consistent tissue margin, so long as the relative orientation of the two active electrodes is maintained relative to the target tissue during the cut. In this way, a consistent margin is simultaneously provided at the same time that the target tissue is surgically removed.

A monopolar telescopic electrosurgery pencil with argon beam capabilities which includes telescoping members contained within the pencil and a monopolar electrosurgery blade assembly with a non-conductive tube member for an inert gas.

An electrosurgical system includes a grasper and a snare that each includes electrodes. The grasper includes a first electrode that is attachable to a first output of an energy supply. The snare includes a second electrode that is attachable to a second output of the energy supply. When the first and second electrodes are coupled to the energy supply, the grasper and snare operate as a bipolar electrosurgical system. By grasping the tissue with the jaws of the grasper, the current path between the electrode on the snare and the electrode on the grasper is relatively short, and thus the system operates like a bipolar electrosurgical system. Accordingly, the applied energy can be focused to a small area, minimizing damage to surrounding tissue. In addition, energy suitable for coagulating the cut portion of the stalk of the removed tissue can be readily applied with the bipolar electrosurgical system.