The effect of stent porosity and strut shape on saccular aneurysm and its numerical analysis with lattice boltzmann method

Yong Hyun Kim, Xiaofeng Xu, Joon Sang Lee

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

The analysis of a flow pattern in cerebral aneurysms and the effect of stent strut shapes are presented in this article. The treatment of cerebral aneurisms with a porous stent has recently been proposed as a minimally invasive way to prevent rupture and favor coagulation mechanism inside the aneurism. The efficiency of stent is related to several parameters, including porosity and stent strut shapes. The goal of this article is to study the effect of the stent strut shape and porosity on the hemodynamic properties of the flow inside an aneurysm using a numerical analysis. In this study, we use the concept of flow reduction to characterize the stent efficiency. Also, we use the lattice Boltzmann method (LBM) of a non-Newtonian blood flow. To resolve the characteristics of a highly complex flow, we use an extrapolation method for the wall and stent boundary. To ease the code development and facilitate the incorporation of new physics, a scientific programming strategy based on object-oriented concepts is developed. Reduced velocity, smaller average vorticity magnitude, smaller average shear rate, and increased viscosity are observed when the proposed stent shapes and porosities are used. The rectangular stent is observed to be optimal and to decrease the magnitude of the velocity by 89.25% in the 2D model and 53.92% in the 3D model in the aneurysm sac. Our results show the role of the porosity and stent strut shape and help us to understand the characteristics of stent strut design.

Original languageEnglish
Pages (from-to)2274-2292
Number of pages19
JournalAnnals of Biomedical Engineering
Volume38
Issue number7
DOIs
Publication statusPublished - 2010 Jul

Fingerprint

Stents
Struts
Numerical analysis
Porosity
Hemodynamics
Coagulation
Vorticity
Extrapolation
Flow patterns
Shear deformation
Blood
Physics
Viscosity

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering

Cite this

@article{e847b8c098754b5cae2b2495048807c7,
title = "The effect of stent porosity and strut shape on saccular aneurysm and its numerical analysis with lattice boltzmann method",
abstract = "The analysis of a flow pattern in cerebral aneurysms and the effect of stent strut shapes are presented in this article. The treatment of cerebral aneurisms with a porous stent has recently been proposed as a minimally invasive way to prevent rupture and favor coagulation mechanism inside the aneurism. The efficiency of stent is related to several parameters, including porosity and stent strut shapes. The goal of this article is to study the effect of the stent strut shape and porosity on the hemodynamic properties of the flow inside an aneurysm using a numerical analysis. In this study, we use the concept of flow reduction to characterize the stent efficiency. Also, we use the lattice Boltzmann method (LBM) of a non-Newtonian blood flow. To resolve the characteristics of a highly complex flow, we use an extrapolation method for the wall and stent boundary. To ease the code development and facilitate the incorporation of new physics, a scientific programming strategy based on object-oriented concepts is developed. Reduced velocity, smaller average vorticity magnitude, smaller average shear rate, and increased viscosity are observed when the proposed stent shapes and porosities are used. The rectangular stent is observed to be optimal and to decrease the magnitude of the velocity by 89.25{\%} in the 2D model and 53.92{\%} in the 3D model in the aneurysm sac. Our results show the role of the porosity and stent strut shape and help us to understand the characteristics of stent strut design.",
author = "Kim, {Yong Hyun} and Xiaofeng Xu and Lee, {Joon Sang}",
year = "2010",
month = "7",
doi = "10.1007/s10439-010-9994-5",
language = "English",
volume = "38",
pages = "2274--2292",
journal = "Annals of Biomedical Engineering",
issn = "0090-6964",
publisher = "Springer Netherlands",
number = "7",

}

The effect of stent porosity and strut shape on saccular aneurysm and its numerical analysis with lattice boltzmann method. / Kim, Yong Hyun; Xu, Xiaofeng; Lee, Joon Sang.

In: Annals of Biomedical Engineering, Vol. 38, No. 7, 07.2010, p. 2274-2292.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The effect of stent porosity and strut shape on saccular aneurysm and its numerical analysis with lattice boltzmann method

AU - Kim, Yong Hyun

AU - Xu, Xiaofeng

AU - Lee, Joon Sang

PY - 2010/7

Y1 - 2010/7

N2 - The analysis of a flow pattern in cerebral aneurysms and the effect of stent strut shapes are presented in this article. The treatment of cerebral aneurisms with a porous stent has recently been proposed as a minimally invasive way to prevent rupture and favor coagulation mechanism inside the aneurism. The efficiency of stent is related to several parameters, including porosity and stent strut shapes. The goal of this article is to study the effect of the stent strut shape and porosity on the hemodynamic properties of the flow inside an aneurysm using a numerical analysis. In this study, we use the concept of flow reduction to characterize the stent efficiency. Also, we use the lattice Boltzmann method (LBM) of a non-Newtonian blood flow. To resolve the characteristics of a highly complex flow, we use an extrapolation method for the wall and stent boundary. To ease the code development and facilitate the incorporation of new physics, a scientific programming strategy based on object-oriented concepts is developed. Reduced velocity, smaller average vorticity magnitude, smaller average shear rate, and increased viscosity are observed when the proposed stent shapes and porosities are used. The rectangular stent is observed to be optimal and to decrease the magnitude of the velocity by 89.25% in the 2D model and 53.92% in the 3D model in the aneurysm sac. Our results show the role of the porosity and stent strut shape and help us to understand the characteristics of stent strut design.

AB - The analysis of a flow pattern in cerebral aneurysms and the effect of stent strut shapes are presented in this article. The treatment of cerebral aneurisms with a porous stent has recently been proposed as a minimally invasive way to prevent rupture and favor coagulation mechanism inside the aneurism. The efficiency of stent is related to several parameters, including porosity and stent strut shapes. The goal of this article is to study the effect of the stent strut shape and porosity on the hemodynamic properties of the flow inside an aneurysm using a numerical analysis. In this study, we use the concept of flow reduction to characterize the stent efficiency. Also, we use the lattice Boltzmann method (LBM) of a non-Newtonian blood flow. To resolve the characteristics of a highly complex flow, we use an extrapolation method for the wall and stent boundary. To ease the code development and facilitate the incorporation of new physics, a scientific programming strategy based on object-oriented concepts is developed. Reduced velocity, smaller average vorticity magnitude, smaller average shear rate, and increased viscosity are observed when the proposed stent shapes and porosities are used. The rectangular stent is observed to be optimal and to decrease the magnitude of the velocity by 89.25% in the 2D model and 53.92% in the 3D model in the aneurysm sac. Our results show the role of the porosity and stent strut shape and help us to understand the characteristics of stent strut design.

UR - http://www.scopus.com/inward/record.url?scp=77956417149&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77956417149&partnerID=8YFLogxK

U2 - 10.1007/s10439-010-9994-5

DO - 10.1007/s10439-010-9994-5

M3 - Article

C2 - 20300847

AN - SCOPUS:77956417149

VL - 38

SP - 2274

EP - 2292

JO - Annals of Biomedical Engineering

JF - Annals of Biomedical Engineering

SN - 0090-6964

IS - 7

ER -