Laser Doppler anemometry measurements of steady flow through two bi-leaflet prosthetic heart valves

dc.creatorBazan, O
dc.creatorOrtiz, JP
dc.creatorVieira, FU
dc.creatorVieira, RW
dc.creatorAntunes, N
dc.creatorTabacow, FBD
dc.creatorCosta, ET
dc.creatorPetrucci, O
dc.date2013
dc.dateOCT-DEC
dc.date2014-07-30T14:36:11Z
dc.date2015-11-26T16:41:43Z
dc.date2014-07-30T14:36:11Z
dc.date2015-11-26T16:41:43Z
dc.date.accessioned2018-03-28T23:25:59Z
dc.date.available2018-03-28T23:25:59Z
dc.identifierRevista Brasileira De Cirurgia Cardiovascular. Soc Brasil Cirurgia Cardiovasc, v. 28, n. 4, n. 462, n. 469, 2013.
dc.identifier0102-7638
dc.identifier1678-9741
dc.identifierWOS:000330196300009
dc.identifier10.5935/1678-9741.20130076
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/61155
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/61155
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1273016
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionIntroduction: In vitro hydrodynamic characterization of prosthetic heart valves provides important information regarding their operation, especially if performed by noninvasive techniques of anemometry. Once velocity profiles for each valve are provided, it is possible to compare them in terms of hydrodynamic performance. In this first experimental study using laser doppler anemometry with mechanical valves, the simulations were performed at a steady flow workbench. Objective: To compare unidimensional velocity profiles at the central plane of two bi-leaflet aortic prosthesis from St. Jude (AGN 21 - 751 and 21 AJ - 501 models) exposed to a steady flow regime, on four distinct sections, three downstream and one upstream. Methods: To provide similar conditions for the flow through each prosthesis by a steady flow workbench (water, flow rate of 17L/min.) and, for the same sections and sweeps, to obtain the velocity profiles of each heart valve by unidimensional measurements. Results: It was found that higher velocities correspond to the prosthesis with smaller inner diameter and instabilities of flow are larger as the section of interest is closer to the valve. Regions of recirculation, stagnation of flow, low pressure, and flow peak velocities were also found. Conclusions: Considering the hydrodynamic aspect and for every section measured, it could be concluded that the prosthesis model AGN 21 - 751 (RegentTM) is superior to the 21 AJ - 501 model (Master Series). Based on the results, future studies can choose to focus on specific regions of the these valves.
dc.description28
dc.description4
dc.description462
dc.description469
dc.descriptionFaculdade de Medicina da UNICAMP, through Laboratorio de Tecnica Cirurgica e Cirurgia Experimental, Escola Politecnica da USP (EPUSP)
dc.descriptionFaculdade de Medicina da UNICAMP, through Laboratorio de Engenharia Ambiental e Biomedica (PME, LAB)
dc.descriptionCentro Tecnologico de Hidraulica (CTH)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.languageen
dc.publisherSoc Brasil Cirurgia Cardiovasc
dc.publisherSao Paulo Sp
dc.publisherBrasil
dc.relationRevista Brasileira De Cirurgia Cardiovascular
dc.relationRev. Bras. Cir. Cardiovasc.
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectHeart valve prosthesis
dc.subjectBlood flow velocity
dc.subjectLaser-Doppler flowmetry
dc.subjectIn-vitro Evaluation
dc.subjectOf-the-art
dc.subjectFluid-mechanics
dc.subjectAortic-valve
dc.subjectVelocimetry
dc.subjectRegion
dc.subjectSupra
dc.titleLaser Doppler anemometry measurements of steady flow through two bi-leaflet prosthetic heart valves
dc.typeArtículos de revistas


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