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: 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: Disclosed are methods for measuring and controlling the gas temperature in medical procedures. In embodiments of the disclosed methods a gas is supplied to a patient using a gas supply device and a supply line. A heating system heats the gas using a heating wire prior to the gas being provided to the patient. A controller electrically controls the heating power of the heating wire based on an estimated value of a temperature at an exit of the heating system obtained from a mathematical estimation system, wherein a resistance of the heating wire is an input variable of the mathematical estimation system.

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.

Abstract: The present invention relates to a method for controlling the gas temperature in medical devices by means of a state observer, e.g., in the field of laparoscopy or respiration, and to devices for carrying-out said method.

Abstract: The present invention relates to a method for controlling the internal body pressure, e.g., the joint pressure using a medical-technical fluid pump, and to a device for carrying out said method.