An electrosurgical device having an electrode with a first portion whose exterior is electrically uninsulated, a second portion whose exterior is electrically insulated, and a third portion. An elongated hollow body has an internal cavity, a front end, a rear end, an external surface. An electrical circuit is arranged within the body. The second portion of the electrode is not surrounded by the hollow body. A first button is arranged on the external surface of the body for controlling a current flow at a first level. A vacuum tube is slidably engaged by the body. A vacuum outlet port is arranged near the rear end, and the outlet port, internal cavity, and vacuum inlet are in fluid communication with each other.

A surgical instrument includes a housing, an elongated shaft assembly extending from the housing, and an end effector extending from the elongated shaft assembly. An inner shaft of the assembly defines proximal and distal portions and a longitudinal lumen. The proximal portion inhibits passage of gas while the distal portion permits passage of gas. An intermediate collar is disposed about the inner shaft between the proximal and distal portions. An outer sleeve of the assembly is disposed about the inner shaft and the intermediate collar to define a proximal area therebetween proximally of the intermediate collar and a distal annular area therebetween distally of the intermediate collar. The outer sleeve includes a proximal portion surrounding the proximal annular area and a distal portion surrounding the distal annular area. The proximal portion permits passage of gas while the distal portion inhibits passage of gas.

The present disclosure includes catheter systems and methods for treatment of occlusions, including coronary artery chronic total occlusions. The catheter system comprises a catheter coupled to a control system with a distal end inserted into a patient and proximal to a location within a blood vessel with an occlusion. The catheter comprises a flexible outer sheath surrounding a housing with a plurality of lumens to perform various functions to penetrate occlusions.

A system for monitoring gas composition in a surgical cavity during an endoscopic surgical procedure includes an gas recirculation system including a main gas flow circuit for fluid communication with a surgical cavity. The system includes a sensor for monitoring a gas species in a gas flow from a surgical cavity of a patient. The sensor is positioned in a channel branching off from the main gas flow circuit coming from the surgical cavity.

An instrument connection device having a flexible hose-like body with a flexible wall in which the proximal end of a hose is inserted. The hose has a lumen that extends longitudinally through the hose. A wire is arranged inside the hose, for example, inside the lumen. The wire is guided through a punctured hole in the wall that the wire may create during a penetration of wall. The punctured hole may be straight and guides the obliquely. For example, the hole may be inclined to the radial axis and the longitudinal center axis.

An electrosurgical pencil (10) includes a handle (14), a manifold (15) disposed within the handle (14), a suction tube (18) and a blower tube (16) operably coupled to the manifold (15), and an electrode assembly (20) removably coupled to the manifold (15). The suction tube (18) is configured to evacuate fluid from a surgical site and the blower tube (16) is configured to deliver fluid to a surgical site. The electrode assembly (20) includes an outer tubular member (28), an inner tubular member (26), and an electrode (25). The outer tubular member (28) defines at least one suction aperture (28A) and a suction lumen (28L) in fluid communication with the suction tube (18). The inner tubular member (26) is disposed within the suction lumen (28L) of the outer tubular member (28) and defines at least one blower aperture (26A) and blower lumen (26L) in fluid communication with the blower tube (16). The electrode (25) is configured to deliver electrosurgical energy to tissue.

An electrosurgical pencil includes a housing having proximal and distal ends, the proximal end adapted to connect to an energy source and the distal end adapted to receive an end effector assembly therein, the end effector assembly defining a surface area along a length thereof. An activation switch is operably associated with the housing and is configured to deliver electrosurgical energy to the end effector assembly upon actuation thereof. An air control valve is operatively coupled to the activation switch and is configured to simultaneously deliver a gas from a gas source to the surface area around the end effector upon actuation of the activation switch. One or more vents are defined in the distal end of the housing and are configured to direct the gas towards the surface area of the end effector.

An electrosurgical wand is described, for treating a target tissue using electrosurgical energy, which has an elongate shaft with a handle end and a distal end. A first active electrode surface is disposed on the distal end of the shaft and a first digester electrode surface is recessed away from the first active electrode surface and electrically connected with the first active electrode surface. An aspiration aperture is also disposed adjacent the first active electrode surface and fluidly connected with an aspiration lumen, wherein the first digester electrode surface is disposed within the aspiration lumen.

An energy delivery probe is provided that may include any of a number of features. One feature of the energy delivery probe is that it can apply energy to tissue, such as a prostrate, to shrink, damage, denaturate the prostate. In some embodiments, the energy can be applied with a vapor media. The energy delivery probe can include a vapor delivery member configured to extend into a transition zone prostate tissue. A condensable vapor media can be delivered from the vapor delivery member into the transition zone tissue, wherein the condensable vapor media can propagate interstitially in the transition zone tissue and be confined in the transition zone tissue by boundary tissue adjacent to the transition zone tissue Methods associated with use of the energy delivery probe are also covered.

An electrosurgical device is adapted for use through a port and within a body cavity. The device includes a gas supply supplying gas to a distal tip and a valve to regular such supply, and an electric supply for supplying electricity to the distal tip. A pressure relief system is provided to regulate an outflow of gas from within the body cavity to prevent exceeding a predetermined pressure. The inflow of the gas through the valve and outflow of gas through the pressure relief system may occur simultaneously.