Analysis of the coagulates intensity in laser treatment of diabetic macular edema in a Navilas robotic laser system

Abstract

The aim ofthisworkwasto analyze the intensity of the laser coagulates in the treatment of diabetic macular edema conducted in navigation mode on robotic laser system Navilas. Material and Methods. Retrospective analysis of outpatient cards and photographs of the fundus 20 patients (28 eyes) had been done. The patients had type II diabetes mellitus. We performed laser treatment of diabetic macular edema. There were evaluated 4260 coagulates, of which 0 degree 2166 (50.85%), I degree —525 (12.32%), II degree —747 (15.74%), III degree—498 (11.96%), grade IV — 324 (7.6 per cent). Result. The thickness of the retina before treatment in the area of edema was made 339.72±45.3 urn, and after treatment 346±70 urn, student's t-test 0.7124, a difference of 6.5±57.4. Visual acuity before treatment 0.532±0.3, after— 0.521±0.3mm, student's t-test 0,889. Conclusion. The facts obtained in the analysis suggests that the algorithm of selection of power and the way it adjustments in the course of treatment are the weak point of this technique. Development of new methods, giving the possibility to adjust the power depending on the height of the swelling region of the retina, thereby gaining coagulates strictly necessary for the specific case of intensity, will enable to increase the efficiency and safety of laser treatment.

Keywords

• diabetic macular edema
• laser treatment
• the intensity of the coagulates