Patent Number: 8,876,747

Title: Micro-burst ultrasonic power delivery

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.

Inventors: Kadziauskas; Kenneth E. (Coto De Caza, CA), Rockley; Paul (Corona Del Mar, CA), Staggs; James W. (Laguna Niguel, CA)

Assignee: Abbott Medical Optics Inc.

International Classification: A61B 17/20 (20060101)

Expiration Date: 2019-11-04 0:00:00