Abstract: The invention relates to an ultrasonic surgical instrument with a support structure (20), and with an ultrasonic transducer (17) suspended on the support structure (20). A sonotrode (16) is connected to the ultrasonic transducer (17). The support structure (20) comprises a jacket portion (24) that extends around an inner space. According to the invention, the ultrasonic transducer (17) is suspended on a retaining ring (21), which is arranged in a continuation of the jacket portion (24) and which is connected to the jacket portion (24) via a connecting section (23). The connecting portion (24) has a plurality of apertures (26, 27) which in total cover the whole circumference of the connecting portion (24). The invention has the advantage that the instrument is uncoupled from the oscillations of the ultrasonic transducer.

Abstract: A sonotrode for an ultrasonic surgical instrument has a shaft and an instrument head at a distal end of the shaft. The instrument head is equipped with a cutting structure for the treatment of bones. The shaft has a helical cut-out. The helical cut-out is provided with a transversely running shoulder. A method produces a sonotrode and a surgical instrument having such a sonotrode. As a result of the shoulder in the helical cut-out, the torsional vibration of the instrument head is amplified such that bone material can be ablated in a particularly effective fashion.

Abstract: A sonotrode for an ultrasonic surgical instrument has a shaft and an instrument head at a distal end of the shaft. The instrument head is equipped with a cutting structure for the treatment of bones. The shaft has a helical cut-out. The helical cut-out is provided with a transversely running shoulder. A method produces a sonotrode and a surgical instrument having such a sonotrode. As a result of the shoulder in the helical cut-out, the torsional vibration of the instrument head is amplified such that bone material can be ablated in a particularly effective fashion.

Abstract: A sonotrode for an ultrasonic surgical instrument. The sonotrode comprises an instrument head which is equipped with a cutting apparatus that extends in the longitudinal direction. The instrument head is provided with a plurality of through-holes, which extend through the instrument head in the transverse direction. The through-holes impart an elastic inherent mobility to the instrument head, by means of which the removal of broken-up bone material is promoted.

Abstract: An ultrasonic apparatus comprising a hand piece (1) within a handle region (2), a connection tube (3) for connecting to a supply tube, wherein rock salt solution and medical healing agents such as heparin, antibioticts and the like are fed through the feed channel (5) to the sonotrode (7) or ultrasonic treatment head. The ultrasound energy is fed to the hand piece (1) through the connection line to the ultrasonic generator (4) in a conventional way.

Abstract: The present invention furnishes a plasma generator for generating a cold plasma jet beam in the application field of medicine and in particular of surgery as well as other fields of science. The plasma generator is furnished with a separate, frequency tunable oscillator, wherein the frequency tunable oscillator controls the power end stage through a driver stage. The radio frequency of the outpout of the generator is determined by a resonance frequency of a resonance transformer. The plasma current is limited by a capacitor disposed in the hand piece.

Abstract: A method is furnished for a treatment of septic wounds. A hand piece of a sonotrode is connected to a liquid storage. Access to a wound is furnished to the sonotrode. A liquid atomized by ultrasound is delivered to the wound through a sonotrode channel disposed in the sonotrode. Bacteria in the area of the wound are destroyed by the ultrasound emitted by the sonotrode. The method allows to remove a prosthesis not longer desired from a patient. The area left open by the removed prosthesis and/or a bone is filled with a liquid. The sonotrode is then entered into the liquid for propagating ultrasound through the liquid and thereby destroying bacteria present in the liquid.