Abstract: A surgical instrument comprising a sleeve, a electro-mechanical transducer containing a hollow passage for producing mechanical vibrations in response to a magnetic field, an ultrasonic horn mechanically connected to the transducer, containing a hollow passage communicating with that in the transducer, for amplifying the produced vibration such that dissection of biological tissue is produced and a tip having a hollow passage, mechanically connected to the horn and whose passage communicates with that in the horn, for contacting such tissue, connection of the passage to a source of vacuum and a sheath connected to the instrument and surrounding the tip and horn, with a connection to a source of irrigating fluid and a structure for mounting the transducer and horn within the sleeve permitting retracting and extension of the transducer and horn within and with respect to the sheath. The transducer, horn and tip are immersed in the irrigating solution.

Abstract: A surgical instrument comprising a sleeve, a electro-mechanical transducer containing a hollow passage for producing mechanical vibrations in response to a magnetic field, an ultrasonic horn mechanically connected to the transducer, containing a hollow passage communicating with that in the transducer, for amplifying the produced vibration such that dissection of biological tissue is produced and a tip having a hollow passage, mechanically connected to the horn and whose passage communicates with that in the horn, for contacting such tissue, connection of the passage to a source of vacuum and a sheath connected to the instrument and surrounding the tip and horn, with a connection to a source of irrigating fluid and a structure for mounting the transducer and horn within the sleeve permitting retracting and extension of the transducer and horn within and with respect to the sheath. The transducer, horn and tip are immersed in the irrigating solution.