The effect of increasing power when grooving using phacoemulsification
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Authors
Thomson, Rhett S.
Bird, Brian A.
Stutz, Lance A.
Heczko, Joshua B.
Bernhisel, Ashlie A.
Barlow, William R.
Zaugg, Brian
Olson, Randall J.
Pettey, Jeff H.
Issue Date
2019
Type
Article
Language
Keywords
settings , longitudinal power , efficiency , porcine lens model
Alternative Title
Abstract
To determine optimal power settings on the Centurion Vision System during the grooving step in cataract surgery. Methods: Intact porcine lenses hardened by formalin and placed in a chamber designed to simulate the anterior chamber of the eye were used to test longitudinal power at 40%, 70%, and 100% and torsional power at 0%. Flow rate was set at 40 mL/min. Vacuum was set at 400 mmHg, intraocular pressure was set at 50 mmHg, and a balanced phacoemulsification tip with a 20 degree tip and a 30 degree bevel was used. Efficiency (time to groove the lens in half) was determined. Results: Increasing longitudinal power from 40% to 70% increased efficiency by 28% (P< 0.05), and by 32% (P<0.05) when increasing longitudinal power from 40% to 100%. There was no statistically significant increase in efficiency from 70% to 100%. Conclusion: For the tested variables, a longitudinal power of 70% was determined to be most efficient during the grooving step of cataract surgery for equivalent 3-4+ nuclei. Further increases in power demonstrated no statistically significant improvement in efficiency.
Description
Citation
Thomson, R. S., Bird, B. A., Stutz, L. A., Heczko, J. B., Bernhisel, A. A., Barlow, W. R., … Pettey, J. H. (2019). <p>The effect of increasing power when grooving using phacoemulsification</p>. Clinical Ophthalmology, Volume 13, 611�"615. doi:10.2147/opth.s194731
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License
Creative Commons Attribution-NonCommercial 3.0 Unported
Journal
Volume
Issue
PubMed ID
ISSN
1177-5483