Low energy or minimum disturbance method for measuring frequency response functions of ultrasonic surgical devices in determining optimum operating point
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United States of America Patent
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Mar 5, 2013
Grant Date -
Jul 26, 2012
app pub date -
Feb 20, 2012
filing date -
Sep 16, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
An ultrasonic system is provided that includes an ultrasonic device having an elongated member configured to impart ultrasonic energy to tissue and a resonator configured to impart a frequency to the elongated member. The system also includes an ultrasonic generator configured to supply power to the resonator of the ultrasonic device. The ultrasonic generator has a drive signal generator configured to provide a drive signal, a noise signal generator configure to provide a noise signal, and a controller. The controller receives an output signal from the ultrasonic device and the noise signal from the noise signal generator, calculates a transfer function based on the output signal and the noise signal, and adjusts the drive signal generator based on the calculated transfer function.
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