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Optimization of the Oertli CataRhex 3® phacoemulsification machine.
Lance A Stutz1, Joshua B Heczko2, Brian A Bird3
1University of Texas Southwestern Medical School, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
Clinical Ophthalmology (Auckland, N.Z.)
|July 30, 2019
Summary
Optimal phacoemulsification settings for the Oertli CataRhex 3 were determined. Highest efficiency was achieved with 600 mmHg vacuum, 50 mL/min aspiration, and 80% power, minimizing fragment chatter.
Area of Science:
- Ophthalmology
- Surgical Technology
Background:
- Phacoemulsification is a key cataract surgery technique.
- Optimizing machine settings is crucial for surgical efficiency and patient safety.
Purpose of the Study:
- To determine the optimal settings for the Oertli CataRhex 3 phacoemulsification machine.
- Investigate the impact of bottle height, vacuum, aspiration rate, and power on efficiency and chatter.
Main Methods:
- Porcine lens nuclei were emulsified using the easyTip 2.2 mm probe.
- Fragment removal time (efficiency) and fragment bounces (chatter) were measured.
- Settings evaluated: bottle height (60-120 cm), aspiration rate (40-50 mL/min), vacuum (400-600 mmHg), and power (50-100%).
Main Results:
- Efficiency and chatter increased linearly with vacuum up to 600 mmHg.
- Aspiration rate of 50 mL/min showed the highest efficiency, though not statistically significant.
- Increasing power to 80% enhanced efficiency without increasing chatter; 100% power significantly increased chatter.
Conclusions:
- Optimal settings for the Oertli CataRhex 3 are 600 mmHg vacuum, 50 mL/min aspiration rate, and 80% power.
- These settings maximize efficiency while minimizing undesirable fragment chatter.
- Further research may explore other parameters or machine models.
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