ANALYSIS of A 23-GAUGE ULTRA HIGH-SPEED CUTTER WITH DUTY CYCLE CONTROL

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dc.contributor.authorDiniz, Bruno [UNIFESP]
dc.contributor.authorFernandes, Rodrigo B. [UNIFESP]
dc.contributor.authorRibeiro, Ramiro M.
dc.contributor.authorLue, Jaw-Chyng
dc.contributor.authorTeixeira, Anderson G. [UNIFESP]
dc.contributor.authorMagalhaes, Octaviano [UNIFESP]
dc.contributor.authorMaia, Mauricio [UNIFESP]
dc.contributor.authorHumayun, Mark S.
dc.contributor.institutionDoheny Eye Inst
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionHosp Evangel Curitiba FEMPAR
dc.contributor.institutionUniv So Calif
dc.date.accessioned2016-01-24T14:31:44Z
dc.date.available2016-01-24T14:31:44Z
dc.date.issued2013-05-01
dc.description.abstractPurpose: the purpose of the study was to determine the performance of dual pneumatic ultra high-speed 23-gauge cutters operated with variable duty cycle (DC) settings.Methods: Frame-by-frame analysis of high-speed video was used to determine the DC in core, 50-50, and shave modes. Using three cutters at various cycles per minute and aspiration levels, mass of water or vitreous removed from a vial was measured within a specified time period. Average flow rates were calculated for each aspiration level and cut rate with the different DC options.Results: the DC increased with increasing cut rate in the shave mode was relatively stable in the 50-50 mode and decreased for the core mode. the DC converged at 5,000 cycles per minute for the 3 different modes. Water flow curves followed the DC variation. Vitreous flow rates for all the DC modes increased with increasing cut rates and peaked at 5,000 cycles per minute (P < 0.05). the results of the 50-50 mode, which had isolated the DC influence, showed that increasing aspiration and/or cut rate independently increased the vitreous flow rate.Conclusion: Progressive values of aspiration and/or cut rate increase the vitreous flow rate, independently of the DC. the DC control also has an important effect on the vitreous flow, but this effect was reduced at high cut rates because of convergence of the DC modes. RETINA 33: 933-938, 2013en
dc.description.affiliationDoheny Eye Inst, Los Angeles, CA 90033 USA
dc.description.affiliationUniversidade Federal de São Paulo, Dept Ophthalmol, BR-04023900 São Paulo, Brazil
dc.description.affiliationHosp Evangel Curitiba FEMPAR, Dept Ophthalmol, Curitiba, Parana, Brazil
dc.description.affiliationUniv So Calif, Keck Sch Med, Dept Ophthalmol, Los Angeles, CA 90033 USA
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Dept Ophthalmol, BR-04023900 São Paulo, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipNational Eye Institute
dc.description.sponsorshipResearch to Prevent Blindness
dc.description.sponsorshipEye Concepts Laboratory at the Doheny Eye Institute
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIDNational Eye Institute: EY03040
dc.description.sponsorshipIDCAPES: BEX 2326-11-6
dc.format.extent933-938
dc.identifierhttp://dx.doi.org/10.1097/IAE.0b013e3182733f38
dc.identifier.citationRetina-the Journal of Retinal and Vitreous Diseases. Philadelphia: Lippincott Williams & Wilkins, v. 33, n. 5, p. 933-938, 2013.
dc.identifier.doi10.1097/IAE.0b013e3182733f38
dc.identifier.issn0275-004X
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/36316
dc.identifier.wosWOS:000318011100006
dc.language.isoeng
dc.publisherLippincott Williams & Wilkins
dc.relation.ispartofRetina-the Journal of Retinal and Vitreous Diseases
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectvitrectomyen
dc.subjectduty cycleen
dc.subjectcut rateen
dc.subjectaspirationen
dc.titleANALYSIS of A 23-GAUGE ULTRA HIGH-SPEED CUTTER WITH DUTY CYCLE CONTROLen
dc.typeinfo:eu-repo/semantics/article
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