Thermal Effect in Energy Using Cataract Surgery
Purpose
to study thermal effect propagation mode in fluid medium in energy –utilizing cataract surgery comparatively for ultrasound and laser energy.
Methods
Thermovisometry data were collected using thermograph “IRTIS-2000” with a0.02°C accuracy of measurement. We compared thermal effect propagation mode from working tips of ultrasoumd phacoemulsification machine “Millenium” and laser machine “Rakot” separately in equal solution level.
Results
At 100% ultrasound in continuous mode thermogram registers vortex flows of heat propagation in all fluid area. In 19 sec. of ultrasound work tip temperature increased at input at 4 -5° C in water medium. In laser tip working thermogram demonsrates different propagation mode. Temperature increase is registered locally around working laser tip. No vortex flows of heat propagation in whole volume of the studied vessel found. After 19 sec. water temperature in this area without aspiration increased at 3.9°.
Conclusion
The strictly localized heat propagation mode around laser tip found is one of the factors sparing adjacent to lens eye structures from unwanted irradiation effects. This is fundamental advantage of laser energy over ultrasound.
All authors have no financial interest in the subject matter of this abstract.