Purpose: To compare the safety and efficacy of microcoaxial phacoemulsification surgeries performed with the OZil Intelligent Phaco torsional mode (Alcon Laboratories, Inc., Fort Worth, USA) and combined torsional/longitudinal ultrasound mode using 45 degree aperture angled tips.
Design: Prospective randomized clinical trial.
Methods: setting: Maltepe University, Istanbul. patient population: Eighty eyes of 80 cataract patients were randomly assigned to 2.2 mm microcoaxial phacoemulsification using the OZil Intelligent Phaco torsional mode (Group 1) or combined torsional/longitudinal ultrasound mode (Group 2). observation procedure: Intraoperative fluid and energy usage and postoperative examinations were evaluated. main outcome measures: Ultrasound time, cumulative dissipated energy, longitudinal and torsional ultrasound amplitudes, mean operation time, mean volume of fluid used, and surgical complications.
Results: Both groups included 40 eyes. Mean ultrasound time, cumulative dissipated energy, and longitudinal and torsional ultrasound amplitudes in Group 1 were 58.21±33.81 seconds, 7.74±6.23, 0.45±0.30, and 26.30±12.60%, respectively, and these parameters in Group 2 were 64.75±30.23 seconds, 12.61±6.21, 26.32±5.85, and 40.98±8.33%, respectively. Cumulative dissipated energy and longitudinal and torsional amplitudes were found to be significantly lower in Group 1 (P=.001, P<.001, P<.001). Mean volumes of fluid used in Groups 1 and 2 were 73.30±19.87 cc and 107.07±21.82 cc, respectively (P<.001).
Conclusion: With the aid of a 45 degree aperture angled tip, the OZil Intelligent Phaco torsional mode provided more effective lens removal than the combined torsional/longitudinal ultrasound mode, with a lower cumulative dissipated energy and volume of fluid used.
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