A tissue resecting device includes an outer sleeve having an axial bore extending along a longitudinal axis from a proximal end to a distal end and opening to an outer window near the distal end. An inner sleeve is rotatably received in the axial bore of the outer sleeve and has an axial channel adapted for communication with a negative pressure source. A distal housing is attached to a distal end of the inner sleeve and has an annular dielectric portion and a circumferentially adjacent annular metal portion having an inner window with circumferentially spaced-apart sharp cutting edges that opens to the axial channel. An active electrode is carried by the annular dielectric portion, and the inner window is circumferentially spaced-part from the active electrode so that the inner window and the active electrode rotate alternately into alignment with the outer window as the inner sleeve is rotated within the outer sleeve.

A conductive coating may be adhered to a structure comprising a hydrophobic and/or adhesion-resistant surface. The conductive coating may have a polymer backbone with conductive particles suspended in the backbone. In some embodiments, the conductive coating may be applied directly to the surface. In other embodiments, the conductive coating may be indirectly applied by first applying a primer adhesive to the outer surface, and then applying the conductive coating over the primer adhesive. An example structure may be a catheter of an endoscopic medical device, such as a bipolar sphincterotome, where the conductive coating functions as a return electrode.

A medical device includes a hand piece, a heating power supply, and a therapy power supply. The hand piece includes a first electrode including a heater. The heating power supply selectively provides heating power to the heater. The therapy power supply selectively provides therapeutic power to the first electrode. The medical device is changeable between operating a first electrosurgical configuration and a second electrosurgical configuration. In the first electrosurgical configuration, the heating power supply provides the heating power to the heater to heat the first electrode and the therapy power supply provides the therapeutic power to the first electrode. A single conductor line carries the heating power to the heater and the therapeutic power to the first electrode.

A tissue resection device includes an elongate shaft having a ceramic working end with a window and a wire-like electrode. A motor oscillates the electrode back and forth in an arc between opposing sides of the window. The working end is engaged against a tissue surface while radiofrequency current is delivered to the wire-like electrode to cut tissue received within the window. A negative pressure source may be connected to the window through an interior passageway in the elongate shaft to extract cut tissue from the working end.

A tissue resecting device includes an elongated shaft having a central axis, a distal end, and an outer surface. An offset housing is mounted on the distal of the shaft and has a tissue-receiving window. The tissue-receiving window is offset radially outwardly from the outer surface of the shaft, and a moveable electrode is configured to move back and forth across the window to resect tissue which extends into the window. The offset housing improves visibility of the cutting window when viewed from endoscopes and other visualization apparatus.

A control device for an ablation treatment tool includes: a target-value storage unit that stores a target value for the total treatment area; an energy-source output unit that outputs, to the ablation treatment tool, an energy source for performing ablation treatment; an area calculation unit that calculates the total treatment area of the ileal mucosa on which the ablation treatment has been performed; and a control unit that controls termination of the ablation treatment performed by the ablation treatment tool. The control unit notifies an operator of the termination of the ablation treatment or stops the output of the energy source from the energy-source output unit when the calculated total treatment area of the ileal mucosa becomes equal to or greater than the target value.

A bipolar electrode instrument for use in a resectoscope and having an elongated shaft section, through which a first conductor extends, which forms a working electrode to which high-frequency current can be applied at the distal end of the electrode instrument, and a second conductor further extending through the shaft section, which forms a counter electrode in the distal end region of the electrode instrument. The working electrode and the counter electrode are spatially separated from one another in such a way that the distance between them cannot be bridged by a straight conductor which has a length of 6 mm or less. When used in a resectoscope for endoscopic surgery with a cladding tube, the electrode instrument is mounted so as to be longitudinally displaceable inside the cladding tube.

The invention provides an electrode for a prostate surgery and a using method thereof, and belongs to the technical field of medical apparatus and instruments. The electrode includes an electrode body, and the electrode body is provided with a concave arc surface and a convex arc surface; the electrode body includes a base body, an anterior resecting portion and a posterior resecting portion. The electrode has functions of being enucleatable and resectable, and also has a function of enlarging a hemostatic area, and is capable of improving the hemostatic effect and improving the hemostatic efficiency, thereby the efficiency of the surgery may be improved, the operation difficulty and risk of the surgery are reduced, the bleeding and injury of a patient during the prostate surgery are also reduced at the same time, the safety and success rate of the prostate surgery are improved, and the patients are benefited.

A surgical system for treating targeted tissue in a fluid-filled working space includes a probe having an elongated shaft extending from a proximal end to a working end. A tissue-receiving window formed in the working end opens to a passageway in the elongated shaft, and a motor moves an electrode across the tissue-receiving window to resect tissue. A radiofrequency (RF) current source is coupled to the electrode, and a controller operatively connected to the motor and the RF source. In some instances, the controller actuates movement of the electrode in response to electrode contact with the targeted tissue. In some instances, the controller actuates movement of the electrode in a single stroke to perform biopsy.

An endoscope apparatus includes: a camera including an imaging unit configured to receive light and convert the light into an electric signal; a first cable configured to transmit the electric signal, one end of the first cable being connected to the camera; an operating unit connected to another end of the first cable and including an electrooptic conversion unit configured to convert the electric signal transmitted through the first cable into an optical signal, and a switch configured to receive user operations; a second cable configured to transmit the optical signal, one end of the second cable being connected to the operating unit; and a connector provided to another end of the second cable and configured to connect the other end of the second cable to an external device.