Abstract: An apparatus having a vibratable tip for ultrasonically disintegrating tissue in a surgical procedure and for aspirating the disintegrated tissue and fluids away from the surgical site through an opening in the tip. A connection to an electrosurgical unit provides for delivery of RF cutting current, RF coagulating current or a blend thereof to the tip so that electrosurgical procedures can be conducted separately or simultaneously with ultrasonic aspiration through the tip. It thus is now possible, for example, to electrocauterize simultaneously with ultrasonic fragmentation with a single handheld surgical device. The simultaneous delivery of ultrasonic vibrations and RF current to the tip also has been found to increase the tissue fragmentation rate.
September 30, 1987
Date of Patent:
June 5, 1990
Alan Broadwin, Charles Vassallo, Joseph N. Logan, Robert W. Hornlein
Abstract: The method of aspirating body tissue and blood from a surgical site along a suction passage having a suction port at an ultrasonically vibrated end of a tool for fragmenting the tissue at a surgical site is improved by introducing an irrigation fluid into the suction passage independently of the suction port.
Abstract: An ultrasonic endodontic dental handpiece has an elongated housing supporting a coil connected for establishing an alternating magnetic field, the housing having a cooling fluid inlet at one end and being open at the other for receiving and supporting a removable insert. The insert includes an elongated hollow body having one end adapted to be insertably mounted in the open end of the housing in fluid communication with the interior of the handpiece, and an elongated tool support assembly telescopingly received in the body. The tool support assembly includes an elongated shaft member having a vibrator rigidly mounted on one end in position to be vibrated by the electromagnetic field and a seal located between the body and shank outboard of the housing to prevent the flow of cooling liquid through the body past the seal.
Abstract: Equipment for abrasive stream cleaning delivers a stream of a gas and particles and a flow of liquid. A nozzle structure provides for entrainment of the liquid by a jet of particle-laden gas.