The effect of increasing power when grooving using phacoemulsification

Rhett S Thomson,1,2 Brian A Bird,3 Lance A Stutz,4 Joshua B Heczko,1 Ashlie A Bernhisel,1 William R Barlow,1 Brian Zaugg,1 Randall J Olson,1 Jeff H Pettey1 1Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA; 2University of Uta...

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Autores principales:	Thomson RS, Bird BA, Stutz LA, Heczko JB, Bernhisel AA, Barlow WR, Zaugg B, Olson RJ, Pettey JH
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2019
Materias:	settings longitudinal power efficiency porcine lens model. Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/1735063c271d4e9eb96698d990ac1f51
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spelling	oai:doaj.org-article:1735063c271d4e9eb96698d990ac1f512021-12-02T07:53:35ZThe effect of increasing power when grooving using phacoemulsification1177-5483https://doaj.org/article/1735063c271d4e9eb96698d990ac1f512019-04-01T00:00:00Zhttps://www.dovepress.com/the-effect-of-increasing-power-when-grooving-using-phacoemulsification-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Rhett S Thomson,1,2 Brian A Bird,3 Lance A Stutz,4 Joshua B Heczko,1 Ashlie A Bernhisel,1 William R Barlow,1 Brian Zaugg,1 Randall J Olson,1 Jeff H Pettey1 1Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA; 2University of Utah School of Medicine, Salt Lake City, UT 84132, USA; 3University of Nevada Reno School of Medicine, Reno, NV 89557, USA; 4University of Texas Southwestern Medical School, Dallas, TX 75390, USA Purpose: 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. Keywords: settings, longitudinal power, efficiency, porcine lens modelThomson RSBird BAStutz LAHeczko JBBernhisel AABarlow WRZaugg BOlson RJPettey JHDove Medical Pressarticlesettingslongitudinal powerefficiencyporcine lens model.OphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 13, Pp 611-615 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	settings longitudinal power efficiency porcine lens model. Ophthalmology RE1-994
spellingShingle	settings longitudinal power efficiency porcine lens model. Ophthalmology RE1-994 Thomson RS Bird BA Stutz LA Heczko JB Bernhisel AA Barlow WR Zaugg B Olson RJ Pettey JH The effect of increasing power when grooving using phacoemulsification
description	Rhett S Thomson,1,2 Brian A Bird,3 Lance A Stutz,4 Joshua B Heczko,1 Ashlie A Bernhisel,1 William R Barlow,1 Brian Zaugg,1 Randall J Olson,1 Jeff H Pettey1 1Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT 84132, USA; 2University of Utah School of Medicine, Salt Lake City, UT 84132, USA; 3University of Nevada Reno School of Medicine, Reno, NV 89557, USA; 4University of Texas Southwestern Medical School, Dallas, TX 75390, USA Purpose: 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. Keywords: settings, longitudinal power, efficiency, porcine lens model
format	article
author	Thomson RS Bird BA Stutz LA Heczko JB Bernhisel AA Barlow WR Zaugg B Olson RJ Pettey JH
author_facet	Thomson RS Bird BA Stutz LA Heczko JB Bernhisel AA Barlow WR Zaugg B Olson RJ Pettey JH
author_sort	Thomson RS
title	The effect of increasing power when grooving using phacoemulsification
title_short	The effect of increasing power when grooving using phacoemulsification
title_full	The effect of increasing power when grooving using phacoemulsification
title_fullStr	The effect of increasing power when grooving using phacoemulsification
title_full_unstemmed	The effect of increasing power when grooving using phacoemulsification
title_sort	effect of increasing power when grooving using phacoemulsification
publisher	Dove Medical Press
publishDate	2019
url	https://doaj.org/article/1735063c271d4e9eb96698d990ac1f51
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The effect of increasing power when grooving using phacoemulsification

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