Control of pulse duty cycle based upon footswitch displacement
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United States of America Patent
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Oct 17, 2017
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N/A
app pub date -
May 17, 2012
filing date -
Jan 22, 1997
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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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