Abstract: A medical apparatus for supplying fluids into body cavities includes a controllable fluid pump, a memory device, a feed line, a pressure sensor in the feed line, a medical instrument to be connected to the feed line. The pressure measured by the pressure sensor is an input variable of a mathematical estimation system, which mathematically describes a state space, which estimates the actual pressure in the body cavity and controls the output of the pump by means of this estimated value. The resistance coefficients ?1 and ?2 of the medical instrument required for the estimation of the pressure are determined when starting the pump. The pressure behavior is evaluated for a certain time, therefrom a characteristic curve is determined, and the characteristic curve is stored in a memory device of the pump.

Abstract: The invention relates to a method for determining compliance of a cavity in minimally invasive surgery and to devices for carrying out said method.

Abstract: The invention relates to a method for determining cavity volumes of rubber-elastic medical products (e.g., latex products) for destruction-free leakage testing and to devices for carrying out said method.

Abstract: Disclosed is a method for determining and controlling the internal body pressure during a medical procedure that includes controlling the output of a fluid pump by means of an estimated pressure value, wherein resistance coefficients ?1 and ?2 of a medical instrument required for the estimation of the pressure value are determined by evaluating a pressure behavior during pump start up.

Abstract: Subject matter of the present invention is a method for determining the resistance coefficients in particular of different combinations of shaft and endoscope when using a medical fluid pump, e.g. in the context of arthroscopy.