Low Energy or Minimum Disturbance Method for Measuring Frequency Response Functions of Ultrasonic Surgical Devices in Determining Optimum Operating Point
First Claim
1. An ultrasonic system, comprising:
- an ultrasonic device configured to impart ultrasonic energy to tissue; and
an ultrasonic generator configured to supply power to the ultrasonic device, the ultrasonic generator comprising;
a controllable drive signal generator configured to provide a drive signal;
a controllable noise signal generator configure to provide a noise signal; and
a controller configured to;
receive an output signal from the ultrasonic device and the noise signal from the noise signal generator,calculate a transfer function estimate based on the output signal and the noise signal, andadjust the drive signal generator based on the calculated transfer function estimate.
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Accused Products
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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Citations
14 Claims
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1. An ultrasonic system, comprising:
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an ultrasonic device configured to impart ultrasonic energy to tissue; and an ultrasonic generator configured to supply power to the ultrasonic device, the ultrasonic generator comprising; a controllable drive signal generator configured to provide a drive signal; a controllable noise signal generator configure to provide a noise signal; and a controller configured to; receive an output signal from the ultrasonic device and the noise signal from the noise signal generator, calculate a transfer function estimate based on the output signal and the noise signal, and adjust the drive signal generator based on the calculated transfer function estimate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An ultrasonic generator configured to supply power to an ultrasonic device, the ultrasonic generator comprising:
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a drive signal generator configured to provide a drive signal; a noise signal generator configure to provide a noise signal; an adder configured to combine the drive signal and the noise signal; an amplifier having a gain configured to amplify the combined signal; and a controller configured to; receive an output signal from the ultrasonic device and the noise signal from the noise signal generator, calculate a transfer function estimate based on the output signal, the noise signal and the gain, and adjust the drive signal generator based on the calculated transfer function estimate.
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12. An ultrasonic generator configured to supply power to an ultrasonic device, the ultrasonic generator comprising:
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a drive signal generator configured to provide a drive signal; an amplifier having a gain configured to amplify the drive signal; a noise signal generator configure to provide a noise signal; a resonance circuit configured to provide an output to the resonator of the ultrasonic device; a transformer having a first primary winding coupled to the amplifier, a second primary winding coupled to the noise signal generator and a secondary winding coupled to the resonance circuit; and a controller configured to; receive an output signal from the ultrasonic device and the noise signal from the noise signal generator, calculate a transfer function estimate based on the output signal and the noise signal, and adjust the drive signal generator based on the calculated transfer function estimate. - View Dependent Claims (13, 14)
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Specification