Control of pulse duty cycle based upon footswitch displacement

Details Control of pulse duty cycle based upon footswitch displacement Control of pulse duty cycle based upon footswitch displacement

2007-01-30

2007-01-30

Lucchesi, Nicholas D. (Department: 3763)

Surgery

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

With means for cutting, scarifying, or vibrating tissue

C604S118000, C606S107000

Reexamination Certificate

active

10680595

ABSTRACT:
Phacoemulsification apparatus includes a phacoemulsification handpiece having a needle and an electrical circuitry for ultrasonic vibrating the needle. A power source provides pulsed electrical power to the handpiece electrical circuitry and an input is provided for enabling a surgeon to select an amplitude of dislighted pulses and a pulse width. A control system and pulse duty cycle is provided for controlling the off duty cycle to insure heat dissipation before a subsequent pulse is activated, including a foot pedal switch.

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