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The effect of increasing power when grooving using phacoemulsification.

Rhett S Thomson1,2, Brian A Bird3, Lance A Stutz4

  • 1Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA, jeff.pettey@hsc.utah.edu.

Clinical Ophthalmology (Auckland, N.Z.)
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Summary

For cataract surgery, 70% longitudinal power on the Centurion Vision System is most efficient for grooving dense nuclei. Higher power settings did not significantly improve efficiency.

Keywords:
efficiencylongitudinal powerporcine lens modelsettings

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Area of Science:

  • Ophthalmology
  • Surgical Technology

Background:

  • Cataract surgery involves fragmenting the lens nucleus.
  • Optimizing phacoemulsification parameters is crucial for surgical efficiency and safety.

Purpose of the Study:

  • To determine the optimal longitudinal power setting for the Centurion Vision System during the lens grooving step in cataract surgery.
  • To evaluate the impact of varying power settings on surgical efficiency.

Main Methods:

  • Porcine lenses were used to simulate human eyes.
  • Longitudinal power was tested at 40%, 70%, and 100% with torsional power at 0%.
  • Efficiency was measured by the time required to groove the lens.

Main Results:

  • Increasing longitudinal power from 40% to 70% improved efficiency by 28% (P<0.05).
  • Increasing power from 40% to 100% improved efficiency by 32% (P<0.05).
  • No significant efficiency gain was observed between 70% and 100% power.

Conclusions:

  • A longitudinal power setting of 70% is most efficient for grooving 3-4+ density nuclei during cataract surgery.
  • Higher power settings beyond 70% do not yield statistically significant improvements in grooving efficiency.