Finite Element Simulation of Mechanical Behaviors of Coronary Stent in a Vessel with Plaque

Imani, Misagh; Hojjati, Mehdi; Eshghi, N.; Goudarzi, Ali

doi:10.1063/1.3663175

Cited by 6 publications

(6 citation statements)

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“…Pure water 997.1 4179 0.613 -0.05 CuO 6500 540 18 29 10 À10 Table 2 The coefficient values of CuO-water nanofluids 14 Coefficient values CuO-water a 1 À26.593310846 a 2 À0.403818333 a 3 À33.3516805 a 4 À1.915825591 a 5 6.42185846658 Â 10 À2 a 6 48.40336955 a 7 À9.787756683 a 8 190.245610009 a 9 10.9285386565 a 10 À0.72009983664…”

Section: Problem Definitionmentioning

confidence: 99%

“…Computational approaches have been broadly applied for the simulation of engineering-related issues; [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] in the eld of nanouids, researchers have applied these approaches to investigate the behavior of these kinds of liquids to achieve the full potential of nanouids. The inuences of the 2nd order temperature jump and velocity slip B.Cs for 3rd-grade nano-uids over a coaxial tube have been investigated by Zhu et al 16 Their ndings show that thermophoresis movement and Brownian motion cause the temperature to increase.…”

Section: Introductionmentioning

confidence: 99%

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A numerical simulation for magnetohydrodynamic nanofluid flow and heat transfer in rotating horizontal annulus with thermal radiation

et al. 2019

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The impact of an axial magnetic field on the heat transfer and nanofluid flow among two horizontal coaxial tubes in the presence of thermal radiation was considered in this study. The impact of viscous dissipation was also considered. The well-known KKL (Koo-Kleinsteuer-Li) model was applied to approximate the viscosity of the nanofluid and the effective thermal conductivity. Furthermore, proper transformations for the velocity and temperature were applied in this study to obtain a set of ODEs (ordinary differential equations) for basic equations governing the flow, heat and mass transfer. In addition, the 4th order Runge-Kutta (RK) numerical scheme was applied to solve the differential equations along with the associated boundary conditions. The impacts of different parameters, including Hartmann number, Reynolds number, radiation parameter and aspect ratio, on the heat transfer and flow features were studied. According to the results, the value of the Nusselt number increases with an increase in the radiation parameter, Hartmann number and aspect ratio and a decrease in the Reynolds number and Eckert number. Fig. 8 Effect of aspect ratio on the Nusselt number and skin friction coefficient when Pr ¼ 6.8, h ¼ 0.5, Ec ¼ 0.01, Rd ¼ 0.1, Re ¼ 1, f ¼ 0.04.

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Section: Problem Definitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A numerical simulation for magnetohydrodynamic nanofluid flow and heat transfer in rotating horizontal annulus with thermal radiation

et al. 2019

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“…The mechanical behavior of the stent is modeled using the bi-linear elastoplastic material model [22], [23]. This material model approaches the permanent deformation that stent displays after the stent deployment.…”

Section: Materials Propertiesmentioning

confidence: 99%

“…The hyperelastic material model used is the five parameter third order Mooney-Rivlin model, defined by a polynomial form in Eq. (1) and described by Eshghi et al [22] :…”

Section: Materials Propertiesmentioning

confidence: 99%

Modeling stent deployment in realistic arterial segment geometries: The effect of the plaque composition

Karanasiou

Sakellarios

Tripoliti

et al. 2013

13th IEEE International Conference on BioInformatics and BioEngineering

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S tents are medical devices used in cardiovascular intervention for unblocking the diseased arteries and restoring blood flow. During stent implantation the deformation of the arterial wall as well as the resulted stresses caused in the arterial morphology are studied. In this paper we study the effect of the composition of the atherosclerotic plaque during the stent deployment procedure, using Finite Element modeling. The stenting procedure is simulated for two different cases; in the first the presence of the plaque is ignored whereas in the second a three dimensional (3D) stiff calcified plaque is located in the stenotic area of the artery. Results indicate that in the second case the von Mises stresses in the arterial wall are higher than the stresses occurred in the first case. In addition, the distribution of the arterial von Mises stress depends on the plaque composition.

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“…It is widely accepted that finite element analysis (FEA) is a powerful tool for computational modeling, revealing the structural response of the arterial walls during stent implantation (Eshghi et al 2011;Imani et al 2013a;Imani 2013). The factors that influence stent implantation involve the stent loading method (Imani et al 2014), the stent structural design (Hara et al 2006;Lally et al 2005;Hsiao et al 2012;Imani et al 2013bImani et al , 2015, the wire stent fabrication technique (Zhao et al 2012a), the material of the stent (Schiavone et al 2014), and the plaque and vessel geometry (Dottori et al 2016;Shen et al 2014;Wei et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Tissue Stresses in Stented Coronary Arteries with Different Geometries: Effect of the Relation Between Stent Length and Lesion Length

Shen

Deng

et al. 2018

Iran J Sci Technol Trans Mech Eng

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In-stent restenosis after stent deployment remains an obstruction in the long-term benefits of stenting. This study sought to investigate the influence of the relation between stent length and lesion length on the mechanics of the arterial wall with different geometries, including straight and tapered vessels. Results showed that when the length of the stent was longer than the lesion length, the maximum stress in plaque and vessel increased as the length of stent increased. When the length of the stent was shorter than the lesion length, the vessel stress induced by stent inflation was lower; both ends of the stenosis plaque could not be fully expanded. When the length of the stent was equal to the lesion length, the plaque and vessel stress induced by stent inflation was minimal, and stent foreshortening was minimal. Compared with the straight vessel, the stent implantation in the tapered vessel with the same stent length resulted in greater stress in vessel and plaque, an increased stent recoil, and a decreased stent foreshortening. When the length of the stent is equal to lesion length, it may be the reasonable choice for straight vessels and tapered vessels. Conclusions drawn from this article can help surgeons to choose appropriate stent lengths.

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Finite Element Simulation of Mechanical Behaviors of Coronary Stent in a Vessel with Plaque

Cited by 6 publications

References 0 publications

A numerical simulation for magnetohydrodynamic nanofluid flow and heat transfer in rotating horizontal annulus with thermal radiation

A numerical simulation for magnetohydrodynamic nanofluid flow and heat transfer in rotating horizontal annulus with thermal radiation

Modeling stent deployment in realistic arterial segment geometries: The effect of the plaque composition

Tissue Stresses in Stented Coronary Arteries with Different Geometries: Effect of the Relation Between Stent Length and Lesion Length

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