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Vacuum sense control for phaco pulse shaping

  • US 8,034,067 B2
  • Filed: 01/08/2010
  • Issued: 10/11/2011
  • Est. Priority Date: 08/01/2006
  • Status: Active Grant
First Claim
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1. An apparatus for controlling ultrasonic power delivery to a surgical area, comprising:

  • a device configured to encounter vacuum pressure at the surgical area;

    a vacuum sensor configured to monitor vacuum pressure encountered by said device;

    a computer configured to compute an ultrasonic pulse profile for delivery to a needle configured to vibrate based on the ultrasonic pulse profile received, the ultrasonic pulse profile based on monitored vacuum pressure received from the vacuum sensor;

    wherein the ultrasonic pulse profile comprises a baseline ultrasonic pulse region and an altered ultrasonic pulse region, the altered ultrasonic pulse region comprising a pulse portion altered based on monitored vacuum pressure; and

    wherein the computer computes the ultrasonic pulse profile based on actual sensed aspiration vacuum pressure multiplied by maximum pulse amplitude minus minimum pulse amplitude and divided by maximum sensed aspiration vacuum pressure, added to minimum pulse amplitude.

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