Evaluation of stent effect and thrombosis generation with different blood rheology on an intracranial aneurysm by the Lattice Boltzmann method

Mezali, Farouk; Benmamar, Saâdia; Naima, Khatir; Ameur, Houari; Ouared, Rafik

doi:10.1016/j.cmpb.2022.106757

Cited by 9 publications

(3 citation statements)

References 38 publications

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“… The effect of stents is more clearly visualized in the case of systolic velocity than in the case of diastolic velocity.  The shear rate values are much higher in the case of the abdominal aortic aneurysm than in the anterior cerebral aneurysm, which coincides with the medical theory that the phenomenon of thrombosis is rare in aortic aneurysms (a high value of the shear rate indicates a low probability of thrombosis formation [23]).  The purpose of placing stents in the case of cerebral saccular aneurysms is to promote the formation of thrombosis inside the aneurysmal sac.…”

Section: Discussionsupporting

confidence: 81%

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Numerical investigation of pulsed flow in aortic aneurism with and without stent by lattice Boltzmann method

Mezali,

Sâadia,

Mohamed Saber

et al. 2023

ENPESJ

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Endovascular treatment of aortic aneurysms with an endoprosthesis is proposed for the prevention of the aneurysms' rupture risk and clogging of blood vessels. This paper aims to study the impact of stents with different porosities, placed in fusiform aortic aneurysms, on the hemodynamic parameters: velocity and shear rate of the flow inside the aneurysms, using pulsed boundary conditions derived from real measurements. The numerical investigations are performed with the Lattice Boltzmann method. The blood is treated as a Newtonian fluid and then as a non- Newtonian fluid with the Carreau-Yasuda and Cross models. The reduction obtained by a single stent is modest and unfavorable to thrombotic occlusion. Overlapping of several stents is proposed to promote occlusion. The results found show good agreement with medical theory.

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Section: Discussionsupporting

confidence: 81%

“…Indeed, velocity alone is not enough as an index for monitoring the generation of thrombosis. The shear rate must be added since this index is proposed as a key variable for the appearance and development of thrombosis [22][23][24].…”

Section: Discussionmentioning

confidence: 99%

Numerical investigation of pulsed flow in aortic aneurism with and without stent by lattice Boltzmann method

Mezali,

Sâadia,

Mohamed Saber

et al. 2023

ENPESJ

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show abstract

“…In light of the critical role that advanced computational modeling plays in the analysis and treatment of cardiovascular disorders, particularly abdominal aortic aneurysm (AAA), recent research emphasizes the necessity of integrating state-of-the-art methodologies and fndings. Innovative computational techniques, as detailed in recent studies, have shown promising advancements in simulating the hemodynamic efects of treatments and understanding the intricate dynamics within the aneurysm sac [10]. Moreover, these studies ofer insights into optimizing treatment strategies through detailed analyses of stent design parameters, directly contributing to the precision and effectiveness of AAA interventions [11].…”

Section: Introductionmentioning

confidence: 99%

The Role of Wall Mechanics in the Hemodynamics of a Realistic Abdominal Aortic Aneurysm: A Fluid-Structure Interaction Study

Moradicheghamahi

2024

Journal of Engineering

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Abdominal aortic aneurysm (AAA) can lead to high mortality rates and further complications such as stroke or heart attack due to the risk of rupture and thrombosis. Wall mechanics play a crucial role in the development and progression of aneurysms. This study investigated the effects of wall mechanics on hemodynamic parameters in AAA to understand the risk of rupture and thrombosis. The impact of three aortic wall models (rigid, linear elastic, and hyperelastic) on structural and hemodynamic parameters was examined using CFD and FSI techniques. The blood was modeled using the Carreau non-Newtonian model, and the flow was simulated using the k-ω model. Physiological pulses were used for the velocity at the inlet and the pressure at the outlet. The results demonstrated close similarity between the predictions of the linear elastic and hyperelastic models, in contrast to the somewhat different results of the rigid model. The hyperelastic model predicted higher deformation and von Mises stress levels than the elastic model, although the difference in stress predictions was smaller than the difference in deformation predictions. The rigid model evaluated the time-averaged wall shear stress and oscillatory shear index higher than the other two models in the aneurysmal area but with a lower relative residence time. In general, the hyperelastic model predicted a higher risk of rupture than linear elastic models and a higher risk of thrombus formation than the other two models. The rigid model had the most optimistic prediction.

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A review of constitutive models for non-Newtonian fluids

Sun,

Jiang,

Zhang

et al. 2024

Fract Calc Appl Anal

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Evaluation of stent effect and thrombosis generation with different blood rheology on an intracranial aneurysm by the Lattice Boltzmann method

Cited by 9 publications

References 38 publications

Numerical investigation of pulsed flow in aortic aneurism with and without stent by lattice Boltzmann method

Numerical investigation of pulsed flow in aortic aneurism with and without stent by lattice Boltzmann method

The Role of Wall Mechanics in the Hemodynamics of a Realistic Abdominal Aortic Aneurysm: A Fluid-Structure Interaction Study

A review of constitutive models for non-Newtonian fluids

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