A current generator for a medical treatment system is disclosed herein. In one example, the medical treatment system can include a cable and a current generator. The cable can include a distal portion that couples to a medical device and a proximal portion. The proximal portion of the cable can include a first and second conductor, with each conductor having an exposed contact region. The current generator can releasably couple to the cable to deliver an electrical signal. The current generator can include an inner chamber that can receive at least a portion of the cable. The current generator can also include first and second electrical connectors, which can electrically connect to the conductors. The current generator can also include a cable guide that can assist with position the cable within the inner chamber and a cable lock that can lock a part of the cable in position.

A surgical system includes a housing, an ultrasonic transducer supported by the housing, an end effector assembly distally-spaced from the housing, a clamp lever, and a sensor. The end effector assembly includes an ultrasonic blade operably coupled to the ultrasonic transducer for receiving ultrasonic energy produced by the ultrasonic transducer, and a jaw member pivotable relative to the blade from an open position towards a clamping position for clamping tissue between the jaw member and the blade and imparting a clamping force to the clamped tissue. The clamp lever is operably coupled to the housing and the jaw member such that actuation of the clamp lever relative to the housing pivots the jaw member towards the blade. The sensor is configured to sense whether the clamp lever is sufficiently actuated so as to impart the clamping force to the clamped tissue.

A universal motor cartridge for a surgical instrument includes a reusable housing having a distal face and a bottom surface and configured to securely engage a disposable surgical instrument. Couplers disposed on the distal face are adapted to engage couplers disposed on the surgical instrument upon engagement of the housing. A plurality of electrical interfaces on the bottom surface are adapted to electrically engage corresponding electrical interfaces on the surgical instrument, such that, upon activation of each switch disposed on the surgical instrument, the corresponding electrical interface on the surgical instrument communicates with the corresponding electrical interface on the bottom surface of the housing, which, in turn, actuates the corresponding coupler to engage and actuate the respective coupler on the surgical instrument causing the surgical instrument to rotate/articulate a shaft, open/close a pair of jaw members, deform staples, move a knife or energize an end effector.

A vessel sealing instrument includes a housing having a shaft extending from a distal end thereof including an end effector assembly having opposing first and second jaw members operably coupled thereto. One of the jaw members moveable between open and closed positions for clamping tissue with a closure pressure within the range of about 3 kg/cm.sup.2 to about 16 kg/cm.sup.2. The jaw members are adapted to connect to a generator for providing energy thereto in accordance with a sealing algorithm. An anti-backdrive mechanism is associated with the end effector assembly and includes: a drive shaft coupled to a controller and a screw on opposite ends, the screw configured to engage one of the jaw members upon extension thereof to provide additional closure pressure therebetween. The drive shaft is rotatable by the controller to extend the screw in response to tissue expansion during sealing based on the sealing algorithm.

A vessel sealing instrument includes a housing having a shaft extending from a distal end thereof having an end effector assembly including a pair of opposing first and second jaw members operably coupled thereto. A drive assembly is disposed within the housing and is configured to move the jaw members upon actuation thereof between an open position and a closed position for clamping tissue with a closure pressure within the range of about 3 kg/cm.sup.2 to about 16 kg/cm.sup.2. An anti-backdrive assembly is operably disposed within the housing and includes a drive wedge. A solenoid controller is operably coupled to the drive wedge and is configured to selectively move the drive wedge into the drive assembly upon activation thereof to increase the closure pressure between the jaw members in response to tissue expansion during sealing.

A vessel sealing instrument includes a housing having a shaft extending from a distal end thereof, the distal end including an end effector assembly having a pair of opposing jaw members operably coupled thereto. One or both of the jaw members is moveable between open and closed positions for clamping tissue with a closure pressure. One or both of the jaw members connects to a generator that provides energy thereto in accordance with a sealing algorithm upon activation thereof. An anti-backdrive mechanism is coupled to the end effector assembly and includes a drive shaft coupled at one end to a solenoid and another end that engages one of the jaw members upon extension thereof to provide additional closure pressure between the jaw members. The drive shaft is extendible by the solenoid to extend the drive shaft in response to tissue expansion during sealing based on the sealing algorithm.

An electrosurgical system includes an electrosurgical attachment having a plug with an indicator. The system may also include an electrosurgical generator having a port configured to couple to the plug. The port may include a detection circuit having: a light emitting device configured to illuminate the indicator with a light and an optical module configured to measure the light reflected by the indicator and determine a color of the indicator. The system may also include a controller configured to identify a type of the electrosurgical attachment based on the color of the indicator.

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.

A surgical system that illuminates a surgical site using one or more illumination means is powered by radiofrequency energy produced by an electrosurgical generator. Illumination may occur whether or not current is being delivered from an active electrode to target tissue.

According to some embodiments, a method of confirming successful ablation of targeted cardiac tissue of a subject using a high-resolution mapping electrode comprises pacing said cardiac tissue at a predetermined pacing level to increase the heart rate of the subject from a baseline level to an elevated level, the predetermined pacing level being greater than a pre-ablation pacing threshold level but lower than a post-ablation pacing threshold level, delivering ablative energy to the ablation electrode, detecting the heart rate of the subject, wherein the heart rate detected by the high-resolution mapping electrode is at the elevated level before the post-ablation pacing threshold level is achieved, and wherein the heart rate detected by the high-resolution mapping electrode drops below the elevated level once ablation achieves its therapeutic goal or target, and terminating the delivery of ablative energy to the ablation electrode after the heart rate drops below the elevated level.