| abstract |
A control system for a Liquefracture handpiece that uses output from a surgical console to generate a control signal for an RF amplifier. The output from the RF amplifier is used to drive the handpiece heating element. To prevent excessive heated fluid from entering the eye, the vacuum in the handpiece is monitored and excessive or rapid increases in vacuum level (indicating an occlusion or low aspiration flow) causes the power to the heating element to be reduces or eliminated. |