Micro-burst ultrasonic power delivery

Details Micro-burst ultrasonic power delivery Micro-burst ultrasonic power delivery

2004-05-25

2009-02-03

Mendez, Manuel A (Department: 3763)

Surgery

Means for introducing or removing material from body for...

With means for cutting, scarifying, or vibrating tissue

Reexamination Certificate

active

07485106

ABSTRACT:
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.

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