An Experimental Protocol of the Model to Quantify Traction Applied to the Retina by Vitreous Cutters

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dc.contributor.author Teixeira, Anderson [UNIFESP]
dc.contributor.author Chong, Lawrence
dc.contributor.author Matsuoka, Naoki
dc.contributor.author Arana, Luis
dc.contributor.author Lue, Jaw-Chyng
dc.contributor.author McCormick, Matthew
dc.contributor.author Kerns, Ralph
dc.contributor.author Bhadri, Prashant
dc.contributor.author Humayun, Mark
dc.date.accessioned 2016-01-24T14:05:15Z
dc.date.available 2016-01-24T14:05:15Z
dc.date.issued 2010-08-01
dc.identifier http://dx.doi.org/10.1167/iovs.09-4852
dc.identifier.citation Investigative Ophthalmology & Visual Science. Rockville: Assoc Research Vision Ophthalmology Inc, v. 51, n. 8, p. 4181-4186, 2010.
dc.identifier.issn 0146-0404
dc.identifier.uri http://repositorio.unifesp.br/handle/11600/32753
dc.description.abstract PURPOSE. the purpose of this study was to use a novel method to quantify the traction applied to the retina during vitrectomy.METHODS. Five 20-gauge electric cutters were used. Fresh porcine eyes were positioned in a specially developed holder and transfixed to the retinal layers with a microwire, and the other end was fixed to the load cell of a strain gauge. the cutter to be assessed was introduced into the eye by a micromanipulator at a 45 angle adjacent to the retina. the traction force was evaluated when the cutter was at 3 and 5 mm from the retina. As control, the experiment was repeated in eyes filled with water, and the results were compared to those when the eyes had vitreous gel.RESULTS. Results from the eyes with vitreous gel indicate that retinal traction increased with increasing aspiration vacuum (7.90 dyn for each 100 mm Hg increased; P < 0.05) and proximity to the retina (2.17 dyn; P < 0.05) and decreased with increasing cut rate (2.51 dyn for each 500 cuts per minute increased; P < 0.05). in all eyes filled with water, traction was not observed.CONCLUSIONS. the present study establishes a new reproducible technique to quantify vitreoretinal traction during vitrectomy and demonstrates that the effects of aspiration, distance from the retina, and cut rate are crucial factors in the amount of retinal traction created by vitreous cutters. (Invest Ophthalmol Vis Sci. 2010;51:4181-4186) DOI:10.1167/iovs.09-4852 en
dc.description.sponsorship Bausch Lomb Inc.
dc.description.sponsorship Doheny Eye Institute
dc.format.extent 4181-4186
dc.language.iso eng
dc.publisher Assoc Research Vision Ophthalmology Inc
dc.relation.ispartof Investigative Ophthalmology & Visual Science
dc.rights Acesso aberto
dc.title An Experimental Protocol of the Model to Quantify Traction Applied to the Retina by Vitreous Cutters en
dc.type Artigo
dc.contributor.institution Doheny Eye Inst
dc.contributor.institution Univ So Calif
dc.contributor.institution Niigata Univ
dc.contributor.institution Universidade Federal de São Paulo (UNIFESP)
dc.description.affiliation Doheny Eye Inst, Eye Concepts Lab, Los Angeles, CA 90033 USA
dc.description.affiliation Univ So Calif, Dept Biomed Engn, Viterbi Sch Engn, Los Angeles, CA 90089 USA
dc.description.affiliation Univ So Calif, Keck Sch Med, Dept Ophthalmol, Los Angeles, CA 90089 USA
dc.description.affiliation Niigata Univ, Div Ophthalmol & Visual Sci, Grad Sch Med & Dent Sci, Niigata, Japan
dc.description.affiliation Universidade Federal de São Paulo, Dept Ophthalmol, São Paulo, Brazil
dc.description.affiliation Doheny Eye Inst, Los Angeles, CA 90033 USA
dc.description.affiliation Doheny Eye Inst, Doheny Retina Inst, Los Angeles, CA 90033 USA
dc.description.affiliationUnifesp Universidade Federal de São Paulo, Dept Ophthalmol, São Paulo, Brazil
dc.identifier.doi 10.1167/iovs.09-4852
dc.description.source Web of Science
dc.identifier.wos WOS:000280194100049



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