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Descripción
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| This work is a result of previous investigations with conventional stents and arises after the recent emergence of several devices specifically designed for coronary bifurcations angioplasty. The aim is to compare the hemodynamic performance of these new devices compared to conventional devices and techniques in a coronary bifurcation model. Three different stenting techniques: simple stenting of the main vessel, simple stenting of the main vessel with kissing balloon in the side branch and culotte have been considered. To carry out this study an idealized geometry of a coronary bifurcation is used. Both experiments in the laboratory and numerical simulations will be used, focusing on important factors for the atherosclerosis development, like the wall shear stress, the oscillation shear index, the pressure loss and the vorticity. Micro-CT images were used to reconstruct coronary stents implanted in silicone models (Fig. 1). First, steady simulations are carried out with the commercial code ANSYS-Fluent, and then, experimental measurements with PIV (Particle Image Velocimetry) obtained in the laboratory are used to validate the numerical simulation. The steady computational simulations show a good overall agreement with the experimental data. Second, pulsatile flow is considered to take into account the transient effects. The results obtained permit to evaluate whether the new designs really result in an improvement in the hydrodynamic behaviour of the devices. Obviously the present simulations focus only on the hemodynamic aspects and other factors should be taken into account before choosing the most appropriate stenting technique. Moreover, even if only fluid dynamic criteria are considered, it should be noticed that the configurations studied are idealized coronary bifurcations. The behaviour patterns obtained in this work should be verified in more realistic geometries. | |
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Internacional
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Si |
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Nombre congreso
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EFMC10- European Fluid Mechanics Conference |
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Tipo de participación
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960 |
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Lugar del congreso
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Copenhague (Dinamarca) |
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Revisores
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Si |
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ISBN o ISSN
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CDP08UPM |
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DOI
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Fecha inicio congreso
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14/09/2014 |
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Fecha fin congreso
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18/09/2014 |
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Desde la página
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105 |
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Hasta la página
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105 |
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Título de las actas
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Proceedings |