Thermal Effect in Energy Using Cataract Surgery

Friday, April 17, 2015
KIOSKS (San Diego Convention Center)
Valentina G. Kopayeva, MD, PhD
Boris E. Malyugin, MD, PhD
Sergey Y. Kopayev, MD, PhD

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.