Thesis (M.Sc.) - Cairo University - Faculty of Medicine - Department of Ophthalmology

Objectives: The aim of this study is to correlate between amounts of fluid used during elliptical phacoemulsification using stop and chop technique and the time and power used. Methodology: The study was done on 117 eyes which had different cataract grades. Disinfection and draping of the surgical field was done. Then temporal clear cornea 2.2mm incision was done. Afterwards Two 20 gauge paracentesis was done followed by capsulorhexis. Then Stop and chop nuclear fragmentation using vertical chopping technique took place. It was followed by bimanual irrigation aspiration. Foldable IOL was implanted. Amount of fluid used during phaco and I/A, separately, was documented. Besides cataract grade, phaco power and time used were recorded. The effective phacoemulsification time (EPT) using EFX, denoting the amount of ultrasound delivered not only by transversal motion but also by longitudinal motion, was analyzed. The EFX was roughly the EPT with a specific coefficient for the transversal movement expressed in seconds Results: There is correlation between the amount of fluid used during phacoemulsification and I/A. There is correlation between nuclear grade, total fluid used, average phaco power, u/s time and EFX. These correlations are statistically significant. Conclusion: Preoperatively adjusting amount of fluid used based on cataract grade helped improve overall efficiency by reducing the amount of energy and reducing overall phaco time, so we can achieve minimal effect on the corneal endothelium

Issued also as CD