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The state of the art concerning the use of actuators and sensors and the intelligent microprocessor-based control will be discussed on the basis of a novel urological implant, a fine tuned, sensor controlled artificial sphincter. A set of powerful actuators with a reaction time lower than 10 ms have been realised due to an appropriate design of components. This has been achieved at a supply voltage of 4.2 V and a power input lower than 0.1 mW. An optimal reliability as well as the comfort in operating the implant by the physician and the patient was gained by the use of different data technologies being adapted to the implanted system.

During the renal functional diagnostics at the narcotized rat in various forms of anaesthesia (Pentobarbital and Velonarcon/Faustan) the behaviour of the blood pressure was continuously registered. In contrast to the Velonarcon/Faustan anaesthesia, in which a distinct hypertonic reaction was observed which normalized itself only after 100 minutes with the Pentobarbital anaesthesia an approximately invariable constant blood pressure level lying in the renal autoregulative region could be achieved during the whole period of investigation.