Vitreoretinal Traction Created by Conventional Cutters during Vitrectomy

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dc.contributor.authorTeixeira, Anderson [UNIFESP]
dc.contributor.authorChong, Lawrence P.
dc.contributor.authorMatsuoka, Naoki
dc.contributor.authorArana, Luis
dc.contributor.authorKerns, Ralph
dc.contributor.authorBhadri, Prashant
dc.contributor.authorHumayun, Mark
dc.contributor.institutionDoheny Eye Inst
dc.contributor.institutionUniv So Calif
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionNiigata Univ
dc.date.accessioned2016-01-24T14:05:08Z
dc.date.available2016-01-24T14:05:08Z
dc.date.issued2010-07-01
dc.description.abstractPurpose: To quantify the vitreous traction created by pneumatic (20-,23-, and 25- gauge) and electric cutters (20- and 25- gauge) during vitrectomy.Design: Experimental study.Participants: This is a preclinical study, and no patients were involved.Methods: Five separate cutters for each drive mechanism and gauge (20-, 23-, and 25- gauge pneumatic and 20- and 25- gauge electric) were used for each cut speed at predetermined aspiration rates. the retinal layers of fresh porcine eyes were transfixed with a 0.15-mm steel wire and 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-degree angle adjacent to the retina. the traction force was determined and evaluated at a distance of 3 and 5 mm from the retina with different vacuum and cut rates.Main Outcome Measures: Vacuum, cut speed, force (dynes), distance (millimeters), vitreoretinal traction, and gauge.Results: the 20-, 23-, and 25- gauge pneumatic cutters have a range of traction from 2.06 to 37.22 dynes, 3.85 to 15.38 dynes, 5.13 to 27.91 dynes, respectively. the 20- and 25- gauge electric cutters have a range of traction from 3.60 to 41.78 dynes and 5.28 to 27.91 dynes, respectively. All results are related to distance, cut, and aspiration rate. With an increase of 100 mmHg of vacuum/aspiration, the traction increased from 7.89 to 3.14 dynes (e. g., 4.96 for 20- gauge pneumatic). the traction decreased as the cut rate was increased, from 5.71 to 2.51 dynes (e.g., 3.41 for 20- gauge pneumatic).Conclusions: the results indicate that retinal traction increased with increasing aspiration vacuum and proximity to the retina; conversely, retinal traction decreased with increasing cut rate. the present study 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.Financial Disclosure(s): Proprietary or commercial disclosure may be found after the references. Ophthalmology 2010; 117: 1387-1392 (C) 2010 by the American Academy of Ophthalmology.en
dc.description.affiliationDoheny Eye Inst, Eye Concepts Lab, Los Angeles, CA 90033 USA
dc.description.affiliationDoheny Eye Inst, Doheny Retina Inst, Los Angeles, CA 90033 USA
dc.description.affiliationUniv So Calif, Keck Sch Med, Dept Ophthalmol, Los Angeles, CA 90033 USA
dc.description.affiliationUniversidade Federal de São Paulo, Dept Ophthalmol, São Paulo, Brazil
dc.description.affiliationNiigata Univ, Div Ophthalmol & Visual Sci, Grad Sch Med & Dent Sci, Niigata, Japan
dc.description.affiliationUniv So Calif, Dept Biomed Engn, Viterbi Sch Engn, Los Angeles, CA 90089 USA
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Dept Ophthalmol, São Paulo, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipConcepts at the Doheny Eye Institute
dc.description.sponsorshipBausch & Lomb Inc., Rochester, New York
dc.description.sponsorshipDoheny Eye Institute
dc.description.sponsorshipEye Concepts
dc.description.sponsorshipBausch
dc.description.sponsorshipLomb
dc.format.extent1387-U147
dc.identifierhttp://dx.doi.org/10.1016/j.ophtha.2009.11.004
dc.identifier.citationOphthalmology. New York: Elsevier B.V., v. 117, n. 7, p. 1387-U147, 2010.
dc.identifier.doi10.1016/j.ophtha.2009.11.004
dc.identifier.issn0161-6420
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/32681
dc.identifier.wosWOS:000279436200016
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofOphthalmology
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.titleVitreoretinal Traction Created by Conventional Cutters during Vitrectomyen
dc.typeinfo:eu-repo/semantics/article
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