Comparison of Hemodynamic Performances Between Commercial Available Stents Design on Stenosed Femoropopliteal Artery

Seman, Che Mohammad Hafizal Muzammil Che; Marzuki, Nur Ayuni; Darlis, Nofrizalidris; Marsi, Noraini; Salleh, Zuliazura Mohd; Ishak, Izuan Amin; Taib, Ishkrizat; Sukiman, Safra Liyana

doi:10.37934/cfdl.12.7.1725

Cited by 6 publications

(8 citation statements)

References 17 publications

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“…A no-slip boundary condition was imposed at the wall supposing that it is rigid. In fact, the wall of the AAAs become stiffer following the loss of elastin and their compliance is nearly negligible compared to a healthy aorta [27,28]. This hypothesis was adopted in many studies concerning aorta and AAA [20,21,[29][30][31][32][33][34].…”

Section: Cfd Simulationmentioning

confidence: 99%

Flow Behaviour and Wall Shear Stress Derivatives in Abdominal Aortic Aneurysm Models: A Detailed CFD Analysis into Asymmetry Effect

Belkacemi

AL-Rawi²,

Abbès³

et al. 2022

CFDL

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Assessing the risk of rupture is extremely important to reduce the mortality of the abdominal aortic aneurysm (AAA). Current clinical guidelines suggest considering the maximum diameter as a criterion for planning and surgical intervention; however, this approach is too simplistic and overlooks other morphological parameters that are associated with the risk of rupture. The aim of this paper is to study the thrombogenicity and to predict the risk of AAA rupture by taking into consideration the geometrical asymmetry of the aneurysm, studying its effect on blood flow behaviour and vortical structure, spatiotemporal distribution of wall shear stresses (WSS), and their related parameters. To show the effect of asymmetry on blood flow dynamics and hemodynamic forces, five virtual models were constructed using five values of geometrical asymmetry ratio β ranging from β=0.2 (asymmetric model; AM) to β=1 (symmetric model; SM). Simulations were run for each geometry under transient physiological flow conditions using finite volume discretization. Resting flow rate was investigated in these models and our results demonstrate that the asymmetry of the aneurysm has a clear effect on the flow behaviour, and consequently on WSS distribution, oscillatory shear index (OSI) and time averaged wall shear stress (TAWSS). Furthermore, these preliminary findings suggest that thrombus formation and rupture risk are more probable in an asymmetric abdominal aortic aneurysm.

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Section: Cfd Simulationmentioning

confidence: 99%

Flow Behaviour and Wall Shear Stress Derivatives in Abdominal Aortic Aneurysm Models: A Detailed CFD Analysis into Asymmetry Effect

Belkacemi

AL-Rawi²,

Abbès³

et al. 2022

CFDL

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“…The Navier-Stokes equation and continuity equation are solved by the computing velocity inlet and pressure outlet. Under the assumptions of incompressibility, homogeneity and Newtonian blood, the equations are defined as illustrated these equation [15].…”

Section: Computational Model and Governing Equationmentioning

confidence: 99%

Analysis of Hemodynamic on Different Stent Strut Configurations in Femoral Popliteal Artery

Razhali

Taib

2022

CFDL

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Peripheral arterial disease is a narrowing of the peripheral arteries that might result in blockage if not immediately treated. Normally, an invasive technique called stenting is used at the stenosed arterial region to restore normal blood flow. Furthermore, the impact of physiological stresses on the stented arterial wall may worsen the condition and divert blood away from the main direction of flow. This phenomenon may promote the formation of thrombosis in the stented artery due to the presenting flow recirculation. This study aims to investigate the effect of physiological loads with different hemodynamic factors on the strut configuration in Peripheral arterial. The computational fluid dynamics (CFD) method is governed by continuity and Navier-Stokes equations were implemented. Three-dimensional geometries of the different strut configurations inserted into the peripheral artery are modelled. Each of the struts has different characteristics in terms of strut angle and the number of strut configurations. Due to hemodynamic differences, the pulsatile waveform of the velocity and pressure at the peak systole time were investigated. Hemodynamic factors analysed in this study consist of wall shear stress (WSS), velocity, and pressure. From the result, the prediction of thrombosis formation is around 30% higher for the largest number of strut design. The lowest formation of thrombosis was seen with the fewer strut configurations and the reduction of the strut angle with an overall percentage of 15%.

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“…Majority of PAD patients are asymptomatic, but many also have intermittent claudication, which can cause numbness, cramping, or pain in the legs when walking or ascending stairs. If PAD is not treated, the patient may experience lifestyle-altering leg ulcers, gangrene, and eventually amputation [6]. Atherosclerosis is the primary cause of the obstruction of blood supply, which causes the impairment (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

“…[12] Patients with severe PAD and large plaque diameters may be advised to undergo endovascular therapy in addition to taking generic drugs such aspirin, clopidogrel, and statins [13]. Patients may be referred to surgeons for open surgical atherectomy intervention or for invasive procedures like angioplasty and stenting [6,14,15]. Generally, there are two methods of endovascular therapy i.e., invasive and non-invasive techniques.…”

Section: Introductionmentioning

confidence: 99%

Numerical Approach for The Evaluation of Hemodynamic Behaviour in Peripheral Arterial Disease: A Systematic Review

Shahrulakmar

Johari

Fauzi

et al. 2023

ARFMTS

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Reduced blood flow to the lower extremities causes peripheral arterial disease (PAD), which is caused by atherosclerotic plaque in the arterial wall. If this impairment is not treated, it will result in severe vascular diseases like ulceration and gangrene. Previous research has shown that while evaluating the pathology of the peripheral artery, the assumption of the model geometry significantly impacts the uncertainty of the stenosis area. However, more work needs to be done to understand the interaction between mechanical better and flow conditions in the peripheral artery using a separate computer model of the cardiovascular system. This paper reviews the numerical approach on pre- and post-treatment of hemodynamic behavior in peripheral arterial disease (PAD). The goal of this study was to thoroughly examine the most recent developments with the application of computational studies in PAD from 2017 to 2022. While FSI investigation highlights the behavior of both the fluid and structure domains (blood and artery) during the numerical analysis of blood flow, CFD simulations primarily focus on the fluid domain (blood) behavior. Out of 92 research publications, 19 were appropriate for this assignment. This thorough study divides the publications into the categories of CFD, and FSI approaches. The results were then reviewed in accordance with the wall characteristic, analytical method, geometry, viscosity models, and validation. This paper summarizes the parameters of geometrical construction, viscosity models, analysis methods, and wall characteristics taken into consideration by the researchers to identify and simulate the blood flood flow in the stenosis area. These parameters are summarised in this study. Additionally, it could offer systematic data to help future studies produce better computational analyses.

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Comparison of Hemodynamic Performances Between Commercial Available Stents Design on Stenosed Femoropopliteal Artery

Cited by 6 publications

References 17 publications

Flow Behaviour and Wall Shear Stress Derivatives in Abdominal Aortic Aneurysm Models: A Detailed CFD Analysis into Asymmetry Effect

Flow Behaviour and Wall Shear Stress Derivatives in Abdominal Aortic Aneurysm Models: A Detailed CFD Analysis into Asymmetry Effect

Analysis of Hemodynamic on Different Stent Strut Configurations in Femoral Popliteal Artery

Numerical Approach for The Evaluation of Hemodynamic Behaviour in Peripheral Arterial Disease: A Systematic Review

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