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Method of controlling a surgical system based on irrigation flow

  • US 7,645,255 B2
  • Filed: 02/28/2005
  • Issued: 01/12/2010
  • Est. Priority Date: 03/22/2004
  • Status: Active Grant
First Claim
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1. A method of controlling a surgical system, the surgical system having an ultrasound handpiece, the ultrasound handpiece having a cutting tip, the method comprising the steps of:

  • establishing a threshold temperature;

    monitoring an irrigation pressure in a line running to the ultrasound handpiece;

    calculating a rate of flow of the irrigation fluid;

    determining a heat absorption capacity for the calculated rate of flow of irrigation fluid;

    determining an estimated temperature of an eye based on the determined heat absorption capacity and an amount of power being supplied to the ultrasound handpiece;

    comparing the estimated temperature of the eye to the threshold temperature; and

    adjusting the amount of power delivered to the cutting tip of the ultrasound handpiece based on the comparison of the estimated and threshold temperatures.

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