Computational modelling of endoleak after endovascular repair of abdominal aortic aneurysms

B.J.B.M. Wolters, M.C.M. Rutten, G.W.H. Schurink, F.N. Vosse, van de

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Abstract

To better understand the effects of endoleak on the aneurysm intrasac pressure, previously, in a small number of studies, numerical models have been developed for the simulation of endoleak based on coupled fluid-structure interaction (FSI). Although such models can provide useful information on the fluid dynamics and structural deformations in aneurysms after endovascular repair (EVAR), they may computationally be too expensive if one is solely interested in the effects of endoleak on the risk of aneurysm rupture. To assess the value of computationally more efficient lumped parameter models in the simulation of endoleak, in the current study, a lumped parameter-based computational model of an incompletely excluded abdominal aortic aneurysm is developed as well as one based on coupled FSI. Both models are used to study the aneurysm intrasac pressure as a function of the degree of endoleak and the stent-graft compliance. Based on the agreement of the results of the two models it is concluded that the lumped parameter modelling method provides a useful alternative to coupled FSI for modelling the aneurysm intrasac pressure in the presence of endoleak. The modelled pressure could be used as a boundary condition for solid stress analyses to predict the risk of aneurysm rupture after EVAR.
Original languageEnglish
Pages (from-to)322-335
JournalInternational Journal for Numerical Methods in Biomedical Engineering
Volume26
Issue number3
DOIs
Publication statusPublished - 2010

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Endoleak
Aneurysm
Computational Modeling
Abdominal Aortic Aneurysm
Repair
Fluid structure interaction
Pressure
Rupture
Fluid
Stents
Interaction
Fluid dynamics
Lumped Parameter Model
Grafts
Stent
Hydrodynamics
Numerical models
Compliance
Fluid Dynamics
Boundary conditions

Cite this

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title = "Computational modelling of endoleak after endovascular repair of abdominal aortic aneurysms",
abstract = "To better understand the effects of endoleak on the aneurysm intrasac pressure, previously, in a small number of studies, numerical models have been developed for the simulation of endoleak based on coupled fluid-structure interaction (FSI). Although such models can provide useful information on the fluid dynamics and structural deformations in aneurysms after endovascular repair (EVAR), they may computationally be too expensive if one is solely interested in the effects of endoleak on the risk of aneurysm rupture. To assess the value of computationally more efficient lumped parameter models in the simulation of endoleak, in the current study, a lumped parameter-based computational model of an incompletely excluded abdominal aortic aneurysm is developed as well as one based on coupled FSI. Both models are used to study the aneurysm intrasac pressure as a function of the degree of endoleak and the stent-graft compliance. Based on the agreement of the results of the two models it is concluded that the lumped parameter modelling method provides a useful alternative to coupled FSI for modelling the aneurysm intrasac pressure in the presence of endoleak. The modelled pressure could be used as a boundary condition for solid stress analyses to predict the risk of aneurysm rupture after EVAR.",
author = "B.J.B.M. Wolters and M.C.M. Rutten and G.W.H. Schurink and {Vosse, van de}, F.N.",
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pages = "322--335",
journal = "International Journal for Numerical Methods in Biomedical Engineering",
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Computational modelling of endoleak after endovascular repair of abdominal aortic aneurysms. / Wolters, B.J.B.M.; Rutten, M.C.M.; Schurink, G.W.H.; Vosse, van de, F.N.

In: International Journal for Numerical Methods in Biomedical Engineering, Vol. 26, No. 3, 2010, p. 322-335.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Computational modelling of endoleak after endovascular repair of abdominal aortic aneurysms

AU - Wolters, B.J.B.M.

AU - Rutten, M.C.M.

AU - Schurink, G.W.H.

AU - Vosse, van de, F.N.

PY - 2010

Y1 - 2010

N2 - To better understand the effects of endoleak on the aneurysm intrasac pressure, previously, in a small number of studies, numerical models have been developed for the simulation of endoleak based on coupled fluid-structure interaction (FSI). Although such models can provide useful information on the fluid dynamics and structural deformations in aneurysms after endovascular repair (EVAR), they may computationally be too expensive if one is solely interested in the effects of endoleak on the risk of aneurysm rupture. To assess the value of computationally more efficient lumped parameter models in the simulation of endoleak, in the current study, a lumped parameter-based computational model of an incompletely excluded abdominal aortic aneurysm is developed as well as one based on coupled FSI. Both models are used to study the aneurysm intrasac pressure as a function of the degree of endoleak and the stent-graft compliance. Based on the agreement of the results of the two models it is concluded that the lumped parameter modelling method provides a useful alternative to coupled FSI for modelling the aneurysm intrasac pressure in the presence of endoleak. The modelled pressure could be used as a boundary condition for solid stress analyses to predict the risk of aneurysm rupture after EVAR.

AB - To better understand the effects of endoleak on the aneurysm intrasac pressure, previously, in a small number of studies, numerical models have been developed for the simulation of endoleak based on coupled fluid-structure interaction (FSI). Although such models can provide useful information on the fluid dynamics and structural deformations in aneurysms after endovascular repair (EVAR), they may computationally be too expensive if one is solely interested in the effects of endoleak on the risk of aneurysm rupture. To assess the value of computationally more efficient lumped parameter models in the simulation of endoleak, in the current study, a lumped parameter-based computational model of an incompletely excluded abdominal aortic aneurysm is developed as well as one based on coupled FSI. Both models are used to study the aneurysm intrasac pressure as a function of the degree of endoleak and the stent-graft compliance. Based on the agreement of the results of the two models it is concluded that the lumped parameter modelling method provides a useful alternative to coupled FSI for modelling the aneurysm intrasac pressure in the presence of endoleak. The modelled pressure could be used as a boundary condition for solid stress analyses to predict the risk of aneurysm rupture after EVAR.

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DO - 10.1002/cnm.1283

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