Abstract: A high frequency power generator comprises a power amplifier working in switching operation, an output filter, having at least one series resonant circuit and at least one parallel resonant circuit, and a digital controller including a phase-synchronizable oscillator, wherein the frequency of the drive voltage of the power amplifier is produced upon stimulation of oscillation by the digital controller with the timing pulse of the oscillator, and the digital controller filters off feedback from the high frequency power generator in such manner that the frequency of the drive voltage of the power amplifier lies in a defined frequency range.

Abstract: A handpiece is disclosed for a multifunctional instrument for endoscopic surgery. The handpiece comprises a case; a connector disposed on the case and adapted to be connected to connecting lines such as electrical lines, liquid supply and discharge lines, and the like; at least one ultrasonic transducer arranged in the case; an ultrasonic sonotrode transmitting the ultrasonic energy; and at least one switch for controlling functions of the handpiece. The handpiece is characterized by, among other things, the provision that the sonotrode includes a long and thin probe section with a duct composed of several segments which are welded to each other.

Abstract: A pressure container for applying pressure to a flexible bag received in it and filled with a medical fluid, in order to deliver the fluid from the flexible bag, has a housing that has an opening for introduction of the bag. Also provided are a cover for covering the opening, an aperture for leading a fluid discharge line of the bag out of the pressure container, and a closure for sealed joining of the cover and housing. In the interest of simpler design and easier handling, it is proposed that the housing be configured as an upright hollow-cylindrical body, closed at the bottom and open at the top, the cross section of which has a flattened oval shape and corresponds roughly to the cross-sectional contour of a bag; and that the two opposing large-area upright sidewalls each have, in mirror-image fashion, the shape of a segment of a cylindrical shell whose lateral ends are joined by joining segments.

Abstract: The invention concerns a high-frequency surgical instrument comprising two electrodes which are designed as forceps jaws and to which a high-frequency current from a high-frequency generator can be applied such that a high-frequency current flows between the jaws through the area of tissue to be treated. The instrument according to the invention is characterized in that, for alternative cutting and coagulation, an electrically non-conductive spacer is provided which is introduced between the electrodes when tissue is being cut. At least one duct is provided for flushing and/or removal purposes.

Abstract: A cutting apparatus is provided with both a rotating inner blade and a stationary outer blade at its distal end and is connected to a drive unit disposed in the proximal region. The outer blade is spaced from the inner blade to form an irrigation passage through which an irrigation liquid is passed. A flushing duct is provided for fluid communication to the distal end. Additionally, a suction passage is provided to exhaust tissue particles.

Abstract: The invention relates to an apparatus for irrigating body cavities with a fluid, comprising a reservoir containing the irrigating fluid, a pumping unit which pumps the irrigating fluid from the reservoir via an instrument into the body cavity to be treated, a collector vessel receiving the irrigating fluid flowing out of the body cavity, and measuring means which detect the difference between the introduced quantity of irrigating fluid and the flowing-out quantity of irrigating fluid. The invention excels itself by the aspect that an electronic evaluation unit determines, on the basis of the output signal of the measuring means, the quantity of irrigating fluid lost and additionally the rate of variation of the lost quantity versus time.

Abstract: An apparatus is provided for insufflating gas into a bodily cavity of a human or animal body. The apparatus includes a gas source, a measuring device provided with sensors for sensing the actual gas pressure and the actual gas flow, and a control unit to which the output signals of the sensors are applied. The control unit triggers a pressure regulator, which reduces and regulates the pressure of the gas source to an adjustable insufflation pressure (desired gas pressure), and a flow regulator, which regulates the gas flow to an adjustable value (desired gas flow). For measuring the actual gas pressure, the control unit triggers the flow regulator in such a manner that the gas flow is set at a value between 10 and 40% of the desired gas flow during pressure measurement.

Abstract: A tube pump for conveying liquid or viscous media, with a pump head on which at least two pump rollers are arranged which latter can act in succession on a tube, carrying the medium to be conveyed and located in the tube bed, in such a way that the medium is transported by squeezing the tube tightly, wherein the tube bed and the tube are fashioned so that the tube can be inserted in the tube bed in only one direction. This can be achieved by using end pieces of differing geometric forms and/or sizes, and/or providing that one end piece is magnetic and providing a magnetic sensor in the corresponding socket of the tube bed.

Abstract: A medical pressure transducer is disclosed with a sterilizable pressure dome exhibiting two connections by means of which the pressure dome can be connected to a tube conduit system or the like, the internal pressure of which is to be measured, in such a way that the medium flowing through the tube conduit system passes through the inner space of the pressure dome.The inner space of the pressure dome is constituted by a housing, a sterilizable pressure dome diaphragm transmitting the pressure to an unsterilized pressure sensor, and a relief valve.

Abstract: Support means is provided for mounting an ultrasonic oscillator for engaging washing water in a conventional sink, for use in cleaning medical instruments. One form of support means is an overflow pipe adapted to be inserted at its lower end in the drain opening of a conventional sink and stabilized at its upper end by an arm extended pivotally from the oscillator power supply control positioned adjacent the sink, the oscillator being mounted on the upper end of the overflow pipe and the overflow pipe having a water inlet opening intermediate its ends for establishing the maximum level of washing water in the sink. Another form of support means is a float structure adapted to float on washing water contained in a conventional sink, the float structure mounting an ultrasonic oscillator for engaging the washing water.

Abstract: The elongated, hollow, thin-walled metal shaft of an operation endoscope is lined internally throughout its length by a separate thin-walled sleeve of electrical insulating material, the shaft and sleeve being mounted removably on a common head independently of each other in such manner that they are separable by relative longitudinal movement in the direction by which the sleeve is retracted rearwardly relative to the shaft, thereby affording retraction and replacement of the sleeve without removing the shaft from the operation site.