Effect of different stent configurations using Lattice Boltzmann method and particles image velocimetry on artery bifurcation aneurysm problem

Mokhtar, N. Hafizah; Abas, Aizat; Razak, Nordin Abd; Hamid, Muhammad; Teong, Soon Lay

doi:10.1016/j.jtbi.2017.08.016

Cited by 14 publications

(9 citation statements)

References 16 publications

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“…59,77 The flow setups are equipped with a continuous wave laser, 2,30,31 a pulsed laser, 2,29,44 or a LED light source. 40 Where most of the studies uses one or two (stereo-PIV) cameras, one article describes the construction of a tomographic setup, using four digital cameras arranged at various angles. 7…”

Section: Optical Particle Image Velocimetrymentioning

confidence: 99%

See 1 more Smart Citation

A Systematic Review for the Design of In Vitro Flow Studies of the Carotid Artery Bifurcation

Hoving

Vries

Mikhal

et al. 2019

Cardiovasc Eng Tech

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Associate Editor Patrick Segers oversaw the review of this article. AbstractPurpose-In vitro blood flow studies in carotid artery bifurcation models may contribute to understanding the influence of hemodynamics on carotid artery disease. However, the design of in vitro blood flow studies involves many steps and selection of imaging techniques, model materials, model design, and flow visualization parameters. Therefore, an overview of the possibilities and guidance for the design process is beneficial for researchers with less experience in flow studies. Methods-A systematic search to in vitro flow studies in carotid artery bifurcation models aiming at quantification and detailed flow visualization of blood flow dynamics results in inclusion of 42 articles. Results-Four categories of imaging techniques are distinguished: MRI, optical particle image velocimetry (PIV), ultrasound and miscellaneous techniques. Parameters for flow visualization are categorized into velocity, flow, shearrelated, turbulent/disordered flow and other parameters. Model materials and design characteristics vary between study type. Conclusions-A simplified three-step design process is proposed for better fitting and adequate match with the pertinent research question at hand and as guidance for less experienced flow study researchers. The three consecutive selection steps are: flow parameters, image modality, and model materials and designs. Model materials depend on the chosen imaging technique, whereas choice of flow parameters is independent from imaging technique and is therefore only determined by the goal of the study. Comparative study of magnetic resonance imaging and image-based computational fluid dynamics for quantification of pulsatile flow in a carotid bifurcation phantom. Ann. Biomed. Eng. 31(8):962-971, 2003.Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.BIOMEDICAL ENGINEERING SOCIETY

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Section: Optical Particle Image Velocimetrymentioning

confidence: 99%

“…Both healthy and diseased carotid artery bifurcations are studied. One of the models with diseased geometry is an aneurysmatic bifurcation, 40 all other diseased models are stenotic, sometimes with ulceration. 35,67,68 The geometries are based on either patientspecific geometries or averaged bifurcation dimensions.…”

Section: Model Characteristicsmentioning

confidence: 99%

A Systematic Review for the Design of In Vitro Flow Studies of the Carotid Artery Bifurcation

Hoving

Vries

Mikhal

et al. 2019

Cardiovasc Eng Tech

View full text Add to dashboard Cite

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“…The conventional one is the open surgery treatment (Orion et al 2013). At present, the most preferable approach is the EVAR method (Hafizah Mokhtar et al 2017). EVAR or Endovascular treatment is a feasible technique, where a mesh-like tube called stent is inserted into the aneurysm-damaged artery with the hope to provide a proper pathway of the blood flowing through the artery and blocking it from circulating inside the aneurysm.…”

Section: Introductionmentioning

confidence: 99%

Stent Porosity Efficiency in Treating Wide-Neck Saccular Renal Artery Aneurysm

Bakar¹,

Abas²,

Razak³

2020

JAFM

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Renal arteries are the arteries that supply blood to the kidneys. Renal arteries are the arteries that supply blood to the kidneys. Renal artery aneurysm (RAA) is the second most common visceral aneurysm to occur, which accounts for 22% of the visceral aneurysm. In general population, RAA rate of occurrence was only 0.1%. However, due to the extensive used of angiography technique, RAA has been discovered more frequently. Some claimed that the previous rate of incidence should be higher now because of the capability of angiography. The rupture of this aneurysm could result in haemorrhage, kidney lost and mortality. The size of the renal artery which is different compared to other types of arteries such as the abdominal aorta could produce different flow condition when the artery is inflicted with RAA condition. Thus, a thorough analysis is desired as RAA studies are very limited compared to other aneurysm conditions. In this study, the efficiency of the stent porosity was investigated in treating the RAA. Fluid-structure interaction (FSI) simulations and particle image velocimetry (PIV) experiments were the approaches taken to investigate the flow patterns of the blood when the stent of different porosities was placed in the aneurysm entrance. The effect of wall shear stress (WSS), the deformation of the artery and von Mises stress were also observed in determining the possibility of aneurysm rupture. The study found that the placement of stent of different porosities succeeds in providing an obstruction to the blood from circulating inside the aneurysm sac. This in turns reduced the WSS experienced by the aneurysm sac up a significant value of 96%. This reduction is crucial in order to prevent the aneurysm from rupture. Moreover, the placement of the stent provided support to the renal artery and preventing it from experiencing buckling failure. The maximum deformation of the artery reduced by 42% with stent was placed in the renal artery. In fact, the von Mises stress decreased below the threshold limit of 0.5 MPa with the presence of the stent. In addition, the study found that the stent of porosity 80% has a similar impact to the stent of lower porosity in the case of RAA at main renal artery.

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“…Aneurysm is an arterial condition that occurs because of the weakening of the blood vessel wall (Mokhtar et al 2017). In time, the weak wall stretched and formed an irreversible bulge, which if not treated, increased the risk of rupture and haemorrhage (Alagheband et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…The advancement of the latter has reduces the morbidity and mortality rate, with the advantage of preserving the native vascular tree (Barros et al, 2014). Endovascular (EVAR) is a novel minimally invasive technique performed as an alternative to conservative surgical method and it is included in the management options for the elective repair of the arterial aneurysm (Mokhtar et al, 2017). Among the advantages of EVAR are reduced post-operative complications and shortened length of stay in the hospital in comparison with open surgery treatments (Tsilimparis et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Stent in the Treatment of Renal Artery Aneurysm using FSI Simulation

Bakar¹,

Abas²,

Razak³

2019

JAFM

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Renal artery aneurysm (RAA) is a condition that affects approximately 0.1% of the general population. The rate of incidence is minimal compared to other type of aneurysm but a high number of ruptures have been reported in pregnancy, especially at the third trimester. The concerning issue is that the maternal mortality rate stretches up to 50% and the fetal mortality rate approaching 85% with a universal loss of the affected kidney. This study aimed at investigating the effectiveness of stent in treatment of RAA using the fluid-structure interaction (FSI) approach. The flow pattern, wall shear stress (WSS), deformation and von Mises stress experienced are compared between RAA model without stent and with Abbott RX Herculink stent. A simple PIV experiment, observing the flow profile was conducted as a validation steps in ensuring the simulation results are reliable and accurate. The findings show that the simulation and PIV data are in good agreement in terms of the flow profile. The presence of stent managed to reduce the blood flow maximum velocity down to 46% and minimized the circulation of blood in the aneurysm dome. As for the WSS, the used of stent succeeded in decreasing the WSS experienced by the wall of aneurysm by 71% and below the baseline level of WSS that could induced rupture. The deformation of RAA and maximum von Mises stress reduced by 58% and 73% respectively when stent is used. In addition, the maximum von Mises stress after the stent placement is lower than the threshold value for the ultimate tensile strength of the tissue. This study concluded that the stent placement is effective in reducing the risk of aneurysm rupture in renal artery it can be one of the baseline for the further study regarding the RAA.

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Effect of different stent configurations using Lattice Boltzmann method and particles image velocimetry on artery bifurcation aneurysm problem

Cited by 14 publications

References 16 publications

A Systematic Review for the Design of In Vitro Flow Studies of the Carotid Artery Bifurcation

A Systematic Review for the Design of In Vitro Flow Studies of the Carotid Artery Bifurcation

Stent Porosity Efficiency in Treating Wide-Neck Saccular Renal Artery Aneurysm

Effectiveness of Stent in the Treatment of Renal Artery Aneurysm using FSI Simulation

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