Abstract: A method and a system for controlling a surgical HF generator during a HF surgical procedure performed with a handheld HF surgical instrument supplied with HF energy by the HF generator. The method includes evaluating a succession of images of an operating area that are captured in an image sequence during the HF surgical procedure, including subjecting the images to automatic real-time image recognition to detect a predetermined structure and/or a predetermined operating situation, and in response to detection of the structure and/or operating situation, suggesting or performing a change of an operating parameter and/or operating mode of the HF generator. The system can include the HF generator, at least one handheld HF surgical instrument, a display device, a video endoscope, and a processor that is capable of receiving and evaluating image signals from the video endoscope.

Abstract: A stopcock for a liquid channel of a medical endoscope, having a housing, a spring element and a plug rotatably mounted in the housing, wherein the plug in a working position lies with its conical surface against a seal surface of the housing and can be placed in a medium access position in which the conical and the seal surface have no contact and the housing and the plug remain connected, characterized in that the plug includes one or more transverse grooves, in the outer wall of a conical piece, running transversely to the longitudinal axis of the conical piece and having straight groove bottoms, and the spring element in the medium access position engages with one or more transverse grooves. A medical endoscope having at least one liquid channel, characterized in that it includes at least one stopcock, by which the liquid flow through the channel can be regulated.