Abstract: The invention relates to a medical lighting unit for clinical use comprising a lighting unit body containing at least one lamp and having at least one light outlet side, with the lighting unit body being vertically adjustably mounted on at least one flexible, coilable tensile carrying element supported on a room wall, in particular on the room ceiling. The tensile carrying element is connected at one end to the lighting unit body and at the other end to a drive unit secured to the room wall and containing a drive motor for extending and retracting the tensile carrying element, with the tensile carrying element extending vertically between the drive unit and the lighting unit body. The invention lies in the fact that the carrying element is a single chain with measures being taken, or means being provided, in order to be able to set the lighting unit body in a desired illuminating position despite the single chain suspension.

Abstract: An operating theater luminaire having at least two discharge lamps, which can be switched on and off, can be started and alternatively can be switched on by means of a starting device, and illuminate an operating area via optical means, in particular at least one reflector. A plurality of, in particular two discharge lamps, equipped with individual starting devices, of different powers are provided, as a result of which the intensity of illumination in the operating area can be varied when switching over from one discharge lamp to another.

Abstract: A high frequency surgical instrument which has at least one treatment electrode (11, 11′, 11″) which can be or is connected to a high frequency generator (12), which is at least partly fluid-permeable and to which a fluid, in particular a liquid, which counteracts the sticking of the biological tissue to the treatment electrode (11) can be or is fed in through at least one liquid infeed passage (13). At least the region (11, 11′, 11″) of the treatment electrode which is intended for the interaction with the biological tissue consists totally or partly of a liquid-permeable, porous, biologically compatible sinter material.

Abstract: In a method for the manipulation of an operating theater lamp, control signals are conducted via a signal path which is conducted in the interior of the lamp between an operating unit and at least one setting element. The control signals are modulated via a modulator onto a carrier signal and demodulated back from the latter via a demodulator.

Abstract: The invention relates to an electrically operated medical apparatus, such as an electro-surgical apparatus comprising an electrical instrument which can be handled by a person and which is connectable or connected to an electrically operated feed and control apparatus, such as a high-frequency surgical apparatus, which is connected to a switch to be actuated by the person, by means of which a switching signal initiated by him can switch on and off one or more functions of the electrical instrument in the feed and control apparatus. In accordance with the present teaching, the switch is associated with a transmitter part which converts the switching signals into signals which can be transmitted without wires and which are transmitted via a transmitting element to a receiving element of a receiving station. The receiving element is connected to the switching input of the feed and control apparatus and transmits to the feed and control apparatus a control signal corresponding to the switching signal.

Abstract: An electrosurgical high frequency generator has a high frequency oscillator and, connected thereto, a regulatable power stage to which a patient current circuit with active and neutral electrodes can be connected via an output transformer. Three parameter sensors for the high frequency current, the high frequency voltage and the arc formation are provided at the output circuit and are connected via an interface to a microcomputer which in turn controls the power stage. In accordance with the invention, a tissue impedance sensor is additionally provided which is likewise connected to the microcomputer via the interface.

Abstract: A high-frequency surgical apparatus has a plurality of different operating modes, such as monopolar, tripolar, bipolar, at least one function such as cutting, coagulation in each operating mode and at least one operating mode with several functions and also at least one characteristic within each function which can be selected by one switching key in each case. In accordance with the invention an operating mode selection key is provided for each operating mode. At least some of the switching keys are associated with several operating mode selection keys. On actuating at least one of the operating mode selection keys several of the switching keys are blocked.

Abstract: A trocar for laparoscopic operations on patients has a tube and high frequency connections in the region of the front end of the tube which can be connected to a high frequency generator. A cutting bar is axially displaceable in the tube and can be fixed in a cutting position. The high frequency connections and electrosurgical cutting device connected to the latter are arranged at the front end of the cutting bar.