Kenneth E. Kadziauskas;James W. Staggs;Paul W. Rockley
发明人:
Kenneth E. Kadziauskas,Paul W. Rockley,James W. Staggs
申请号：
US12979924
公开号：
US08197436B2
申请日:
2010.12.28
申请国别(地区):
US
年份:
2012
代理人:
摘要：
Phacoemulsification apparatus includes a phacoemulsification handpiece having a needle and an electrical system for ultrasonically vibrating said needle along with a power source for providing pulsed electrical power to the handpiece electrical system. Irrigation fluid is provided to the handpiece needle and aspirating fluid is removed from the handpiece needle. A determination of a voltage current phase relationship of the provided electrical power is made and in response thereto a control system varies a power level duty cycle provided to the handpiece electrical system from the power source and/or modify the aspiration flow rate. In addition, a separate input enables manual control of pulse amplitude. The control system provides a pulsed electrical power of less than 20 millisecond pulse duration.
