Key result
Computational fluid dynamics simulations accurately predicted intra-luminal pressures in type B aortic dissection models with large tears, demonstrating average relative errors of less than 10% compared to in vitro measurements.
Why the study?
Does a computational fluid dynamic (CFD) tool accurately predict intra-luminal pressures compared to in vitro phantom measurements in type B aortic dissection scenarios?
Does a computational fluid dynamic (CFD) tool accurately predict intra-luminal pressures compared to in vitro phantom measurements in type B aortic dissection scenarios?
CFD simulations can accurately predict intra-luminal pressures in chronic type B aortic dissections with large tears, providing a potential tool for hemodynamic characterization.
Answers are grounded in this paper and cite their sources.
May refine hemodynamic modeling in type B dissection; leaves open clinical adoption pending human validation.
An aortic dissection (AD) is a serious condition defined by the splitting of the arterial wall, thus generating a secondary lumen [the false lumen (FL)]. Its management, treatment and follow-up are clinical challenges due to the progressive aortic dilatation and potentially severe complications during follow-up. It is well known that the direction and rate of dilatation of the artery wall depend on haemodynamic parameters such as the local velocity profiles, intra-luminal pressures and resultant wall stresses. These factors act on the FL and true lumen, triggering remodelling and clinical worsening. In this study, we aimed to validate a computational fluid dynamic (CFD) tool for the haemodynamic characterisation of chronic (type B) ADs. We validated the numerical results, for several dissection geometries, with experimental data obtained from a previous in vitro study performed on idealised dissected physical models. We found a good correlation between CFD simulations and experimental measurements as long as the tear size was large enough so that the effect of the wall compliance was negligible.
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Soudah et al. (2013) studied Type B aortic dissection. Computational fluid dynamics (CFD) simulations vs. In vitro phantom measurements was evaluated on Intra-luminal pressure relative error. Computational fluid dynamics simulations accurately predicted intra-luminal pressures in type B aortic dissection models with large tears, demonstrating average relative errors of less than 10% compared to in vitro measurements.
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