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E. Blumen-Ohana, J. Akesbi, R. Adam, D. Pereira, J. Nordmann; Is Extracapsular Lens Extraction Using Ozil Technology That Different From Standard Ultrasound Phacoemulsification ?. Invest. Ophthalmol. Vis. Sci. 2009;50(13):6108.
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To compare OZIL technology to standard ultrasound phacoemulsification in cataract surgery, in terms of efficacy, safety and corneal endothelial cell loss.
Two groups of patients underwent cataract surgery using phacoemulsification with conventional handpiece (US group n=40) or a new oscillatory handpiece (OZIL group n=40). A "divide and conquer" method with capsular bag lens implantation was performed. The incision, ophthalmic viscosurgical device (OVD) and lens type were the same for all procedures. A standard preoperative ophthalmologic examination was performed to rule out another pathology, as well as corneal endothelial cell count. During surgery, we evaluated procedure duration, ultra sound time, cumulative dissipated energy, amount of fluid used, and complication rate. Postoperatively, we evaluated visual recovery, corneal endothelial cell loss and potential complications.
The two groups were comparable according to age, preoperative visual acuity, density of the nucleus ( Lens Opacities Classification System III), and initial corneal endothelial cell count. The intra operative parameters studied were statistically lower in the OZIL group (p<0,01).The mean endothelial cell loss measured one month after the procedure, was comparable in the two groups (p>0,05).
OZIL technology allows to optimize lens extraction in terms of operating time, energy used. These characteristics are welcome to take care of hard nucleus and the question of endothelial cell preservation remained unknown. According to our study, the repercussion on the corneal endothelium, of cataract surgery is similar using conventional ultra sound or torsional oscillatory system. OZIL technology is safe. It gives similar results as conventional ultrasound phacoemulsification but with a shorter operating time.
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