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Optimization of the Oertli CataRhex 3 (R) phacoemulsification machine
AuthorStutz, Lance A.
Heczko, Joshua B.
Bird, Brian A.
Thomson, Rhett S.
Bernhisel, Ashlie A.
Barlow, William R.
Olson, Randall J.
Pettey, Jeff H.
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The aim of this study was to determine optimal bottle height, vacuum, aspiration rate, and power settings of the Oertli CataRhex 3 (R) phacoemulsification machine. Methods: Porcine lens nuclei were hardened with formalin and cut into 2.0 mm cubes. Lens cubes were emulsified using the easyTip (R) 2.2 mm at 30 degrees. Fragment removal time (efficiency) and fragment bounces off the tip (chatter) were measured. Settings tested included bottle height of 60, 80, 100 and 120 cmaspiration rate of 40, 45, and 50 mL/minvacuum of 400, 500, and 600 mmHgand power of 50, 60, 70, 80, 90, and 100%. Results: Efficiency and chatter increased in a linear fashion with increasing vacuum to 600 mmHg (P=0.017, P=0.046, respectively). The most efficient aspiration rate was 50 mL/min, although this finding lacked statistical significance (P=0.66). Increasing power increased efficiency up to 80% without increasing chatter (P=0.042, P=0.71, respectively). Compared to all other power settings, chatter was increased at 100% (P=0.014). Conclusion: The most efficient machine settings were vacuum at 600 mmHg, aspiration rate at 50 mL/min, and power at 80%.