NDLI: Corneal endothelial cell loss during phacoemulsification: bevel-up versus bevel-down phaco tip.

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Corneal endothelial cell loss during phacoemulsification: bevel-up versus bevel-down phaco tip.

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Corneal endothelial cell loss during phacoemulsification: bevel-up versus bevel-down phaco tip.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Faramarzi, Amir Javadi, Mohammad Ali Karimian, Farid Jafarinasab, Mohammad Reza Baradaran-Rafii, Alireza Jafari, Fariba Yaseri, Mehdi
Description	Country affiliation: Iran Author Affiliation: Faramarzi A ( Ophthalmic Research Center and Department of Ophthalmology, Labbafinejad Medical Center, Shahid Beheshti Medical University, Tehran, Iran. amirfaramarzy@yahoo.com)
Abstract	PURPOSE: To compare corneal endothelial cell loss during cataract extraction by phacoemulsification with 2 different phaco-tip positions. SETTING: Ophthalmic Research Center and Department of Ophthalmology, Labbafinejad Medical Center, Shahid Beheshti Medical University, Tehran, Iran. DESIGN: Randomized clinical trial. METHODS: Eyes scheduled for cataract extraction were randomly assigned stop-and-chop phacoemulsification with the phaco tip in the conventional bevel-up position or with the phaco tip in the bevel-down position. During surgery, the effective phacoemulsification time (EPT) was recorded. Preoperative endothelial cell parameters were compared with measurements taken 3 months postoperatively. RESULTS: Each group comprised 30 eyes (30 patients). There were no statistically significant differences in age, sex, anterior chamber depth, axial length, or EPT between the 2 groups. The mean preoperative endothelial cell density (ECD) was 2544 cells/mm(2) ± 64 (SD) in the bevel-up group and 2471 ± 59 cells/mm(2) in the bevel-down group (P=.610). Postoperatively, both groups had a significant decrease in ECD. The mean endothelial cell loss was 5.9% in the bevel-up group and 13.6% in the bevel-down group (P=.012). The percentage of hexagonal cells and coefficient of variation in cell size were not different between the 2 groups preoperatively or postoperatively; however, after surgery, there was a significant decrease in the percentage of hexagonal cells in both groups. CONCLUSION: Corneal endothelial cell loss during phacoemulsification was significantly higher when the phaco tip was in the bevel-down position than in the conventional bevel-up position. FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.
File Format	HTM / HTML
ISSN	08863350
Issue Number	11
Volume Number	37
e-ISSN	18734502
Journal	Journal of Cataract & Refractive Surgery
Language	English
Publisher	Elsevier
Publisher Date	2011-11-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Ophthalmology Corneal Endothelial Cell Loss Etiology Lens Implantation, Intraocular Phacoemulsification Adverse Effects Methods Aged Cell Count Pathology Endothelium, Corneal Female Humans Intraocular Pressure Male Instrumentation Postoperative Complications Prospective Studies Tonometry, Ocular Visual Acuity Physiology Comparative Study Journal Article Randomized Controlled Trial Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Ophthalmology Sensory Systems Surgery

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