Outcomes of torsional microcoaxial phacoemulsification performed by 12-degree and 22-degree bent tips
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PURPOSE: To compare the safety and efficacy of Ozil Intelligent Phaco torsional microcoaxial phacoemulsification surgeries performed with 12-degree and 22-degree bent tips using the Infiniti Vision System. SETTING: Maltepe University School of Medicine Department of Ophthalmology, Istanbul, Turkey. DESIGN: Comparative case series. METHODS: Eyes were assigned to 2.2 mm microcoaxial phacoemulsification using the torsional mode with a 22-degree bent tip (Group 1) or a 12-degree bent tip (Group 2). The primary outcome measures were ultrasound time (UST), cumulative dissipated energy (CDE), longitudinal and torsional ultrasound (US) amplitudes, mean surgical time, mean volume of balanced salt solution used, and surgical complications. RESULTS: Both groups included 45 eyes. The mean UST, CDE, longitudinal US amplitude, and torsional US amplitude were 65 seconds +/- 27.23 (SD), 11.53 +/- 6.99, 0.22 +/- 0.26, and 42.86 +/- 15.64, respectively, in Group 1 and 84 +/- 45.04 seconds, 16.68 +/- 10.66, 0.48 +/- 0.68, and 46.27 +/- 14.74, respectively, in Group 2. The mean UST, CDE, and longitudinal amplitudes were significantly lower in Group 1 (P=.003, P=.008, and P=.022, respectively). The mean volume of balanced salt solution was 73.33 +/- 28.58 cc in Group 1 and 82.08 +/- 26.21 cc in Group 2 (P=.134). CONCLUSION: Torsional phacoemulsification performed with 22-degree bent tips provided more effective lens removal than 12-degree bent tips, with a lower UST and CDE.