Method of controlling a surgical system based on a rate of change of an operating parameter
First Claim
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:
- determining a rate of change of a first operating parameter of the surgical system;
determining a stage of occlusion based on the rate of change;
detecting a pattern of data of the first operating parameter, detecting the pattern comprising determining a linear correlation between a predefined pattern and data of the first operating parameter during operation of the surgical system; and
adjusting an amount of power delivered to the cutting tip of the ultrasound handpiece based on the determined stage of occlusion.
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Accused Products
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.
164 Citations
73 Claims
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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:
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determining a rate of change of a first operating parameter of the surgical system; determining a stage of occlusion based on the rate of change; detecting a pattern of data of the first operating parameter, detecting the pattern comprising determining a linear correlation between a predefined pattern and data of the first operating parameter during operation of the surgical system; and adjusting an amount of power delivered to the cutting tip of the ultrasound handpiece based on the determined stage of occlusion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method of controlling a surgical system, the surgical system having an ultrasound hand piece, the ultrasound hand piece having a cutting tip, the method comprising the steps of:
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determining a rate of change of a first operating parameter of the surgical system, the first operating parameter comprising an aspiration vacuum; determining a stage of occlusion based on the rate of change, determining the stage of occlusion comprising identifying a pre-occlusion condition, the pre-occlusion condition being identified by an increasing aspiration vacuum, the vacuum pressure increasing at a slower rate following the pre-occlusion condition than during a period of time between an onset of occlusion and the pre-occlusion condition; and adjusting an amount of power delivered to the cutting tip of the ultrasound handpiece based on the determined stage of occlusion. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73)
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Specification