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Method for detecting transverse vibrations in an ultrasonic hand piece

  • US 6,679,899 B2
  • Filed: 09/14/2001
  • Issued: 01/20/2004
  • Est. Priority Date: 10/20/2000
  • Status: Active Grant
First Claim
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1. A method for detecting transverse vibrations in an ultrasonic hand piece, comprising the steps of:

  • applying a drive signal to an ultrasonic hand piece using an ultrasonic generator;

    measuring an electrical characteristic delivered to the hand piece/blade at a first electrical characteristic level while the hand piece/blade is held in midair;

    calculating an expected electrical characteristic using the first electrical characteristic level;

    setting a pass/fail threshold level for an actual measured electrical characteristic based on the expected electrical characteristic;

    measuring the actual electrical characteristic delivered to the hand piece/blade;

    comparing the measured actual electrical characteristic to the pass/fail threshold;

    if the measured actual electrical characteristic is less than the pass/fail threshold, displaying a first message on a liquid crystal display of the generator; and

    if the measured actual electrical characteristic is greater than the pass/fail threshold, displaying a second message on a liquid crystal display of the generator.

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