Method and apparatus for controlling vacuum as a function of ultrasonic power in an ophthalmic phaco aspirator
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United States of America Patent
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-
Jul 30, 2002
Issued Date -
N/A
app pub date -
Aug 11, 1999
filing date -
May 8, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An aspiration system that may include a control valve to allow a flow of fluid into an aspiration line and vary a vacuum pressure within the line. The system may include a pressure transducer that is coupled to the aspiration line by a sensor line and a check valve. The check valve prevents a back flow of fluid from the aspiration line to the pressure line. The system may further have a control circuit that is coupled to the pressure transducer and the control valve. The control circuit may control the control valve and regulate the vacuum pressure within the aspiration line. The control circuit may receive an input signal that also controls a medical handpiece. The input signal can be generated by a foot pedal that also controls the handpiece. The system may thus have one foot pedal that can control the handpiece and the vacuum pressure of the aspiration line.
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