Abstract: The invention relates to a graphical user interface for controlling a virtual reality (VR) graphics system by means of interactions with a function selection that provides at least two functions, whereby the VR graphics system has a projection device for visualizing a virtual three-dimensional scene, and interactions with the VR graphics system ensue by using at least one interaction unit. Said interaction unit, while interacting with a sensor system for detecting a respective physical-spatial position and/or orientation of the interaction unit, serves to generate and transfer position data inside and/or to the VR graphics system. The inventive graphical user interface comprises, in particular, an interaction element, which is functionally and visually formed from at least two partial elements that each provide a mentioned function selection.

Abstract: The invention relates to a method and a device for controlling a virtual reality (VR) graphic system using interactive techniques. Said VR graphic system comprises a projection device for visualising virtual three-dimensional scenes and the interaction with the VR graphic system takes place using at least one interactive device, which detects the respective position and/or orientation of the interactive device on a physical spatial trajectory, generates corresponding positional data and transmits said data to a position recorder of the VR graphic system.

Abstract: Apparatus for making available tools and materials contains a frame, which is formed from a lower frame element and uprights fixed thereto. Closed storage containers for tools and materials can be individually fitted to the frame. The storage containers can be matched to the specific use. The apparatus contains at least three bearing points, which are preferably formed by rolls or wheels.

Abstract: A resectoscope has a shaft and a lock body which is slidable along the shaft and to which the proximal end portion of a resection electrode can be fixed. A handle is provided for displacing the lock body and thus the electrode along the shaft. The handle consists of a first portion connected to the lock body and projecting radially outwardly of the lock body and a second portion connected to the shaft, for engagement by a thumb of the user of the resectoscope. The first portion of the handle is formed as a disc provided with gripping aids for the user's fingers.