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Abstract
Due to the deleterious effects of excess heat production by the
phaco machine on intraocular structures, several ways have been
developed to reduce the energy delivered to the eye.
Manual techniques to cover steps of the surgery that were dependent on
ultrasound are used to decrease total energy delivered. For example,
manual prechop, and phaco chop are used instead of divide and conquer
technique.
Developing technologies that allows surgeons to use high flow rates
and high vacuum to substitute partly or totally for ultrasound use may
also decrease energy used. Using low compliance tubing, microprocessor
control of pumps, ABS and flow restriction systems, high resistance
down sized phaco tips, modification of parameters during tip occlusion
and irrigation pressurization are good examples. This prevention of surge
production allows surgeons to use high vacuum safely.