Method of controlling a surgical system based on a rate of change of an operating parameter
AssigneeAlcon Research, Ltd.
InventorsMikhail Boukhny, Raphael Gordon, Michael D. Morgan, Ann Yadlowsky
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Abstract
A surgical system that is able to sense the onset of an occlusion or other surgical event as well as when an occlusion breaks. To help avoid overheating of the tip, the system of the present invention predicts the temperature of the eye using irrigation flow rate and reduces the power to the handpiece automatically if an overheating situation is predicted. Alternatively or in addition, the system of the present invention monitors the power drawn by the handpiece, which is indicative of the cutting load on the tip, and automatically adjusts the power or stroke of the tip to compensate for increased loads on the tip.
Claims15
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:
- detecting a pattern of data of an aspiration vacuum;
- detecting a pattern of data of an irrigation pressure;
- determining a rate of change of the aspiration vacuum;
- determining a rate of change of the irrigation pressure;
- determining a stage of occlusion based on the rate of change determinations;
- and
- adjusting an amount of power delivered to the cutting tip of the ultrasound handpiece based on the determined stage of occlusion.
Dependencies are inferred from the claim text.