Optimization of the Oertli CataRhex 3 ® phacoemulsification machine.

Autor: Stutz LA; University of Texas Southwestern Medical School, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA., Heczko JB; Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA, jeff.pettey@hsc.utah.edu., Bird BA; University of Nevada Reno, School of Medicine, Reno, NV 89557, USA., Thomson RS; Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA, jeff.pettey@hsc.utah.edu.; University of Utah, School of Medicine, Salt Lake City, UT 84132, USA., Bernhisel AA; Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA, jeff.pettey@hsc.utah.edu., Barlow WR; Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA, jeff.pettey@hsc.utah.edu., Zaugg B; Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA, jeff.pettey@hsc.utah.edu., Olson RJ; Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA, jeff.pettey@hsc.utah.edu., Pettey JH; Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA, jeff.pettey@hsc.utah.edu.
Jazyk: angličtina
Zdroj: Clinical ophthalmology (Auckland, N.Z.) [Clin Ophthalmol] 2019 Apr 16; Vol. 13, pp. 633-639. Date of Electronic Publication: 2019 Apr 16 (Print Publication: 2019).
DOI: 10.2147/OPTH.S196281
Abstrakt: 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 ( 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%.
Competing Interests: Disclosure Dr Olson is on the scientific advisory board of EyeGate Pharmaceuticals and of Perfect Lens. The authors report no other conflicts of interest in this work.
Databáze: MEDLINE
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