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Optimization of the Oertli CataRhex 3 phacoemulsification machine. | LitMetric
Purpose : The aim of this study was to determine optimal bottle height, vacuum, aspiration rate, and power settings of the Oertli CataRhex 3 phacoemulsification machine.Methods : Porcine lens nuclei were hardened with formalin and cut into 2.0 mm cubes. Lens cubes were emulsified using the easyTip 2.2 mm at 30°. Fragment removal time (efficiency) and fragment bounces off the tip (chatter) were measured. Settings tested included bottle height of 60, 80, 100 and 120 cm; aspiration rate of 40, 45, and 50 mL/min; vacuum of 400, 500, and 600 mmHg; and power of 50, 60, 70, 80, 90, and 100%.Results : Efficiency and chatter increased in a linear fashion with increasing vacuum to 600 mmHg (=0.017, =0.046, respectively). The most efficient aspiration rate was 50 mL/min, although this finding lacked statistical significance (=0.66). Increasing power increased efficiency up to 80% without increasing chatter (=0.042, =0.71, respectively). Compared to all other power settings, chatter was increased at 100% (=0.014).Conclusion : The most efficient machine settings were vacuum at 600 mmHg, aspiration rate at 50 mL/min, and power at 80%.
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