A longitudinal study of a lateral intracranial aneurysm: identifying the hemodynamic parameters behind its inception and growth using computational fluid dynamics
| Autor: | R. T. Tatit, José Luiz Gasche, C. E. Baccin, Gabriel Bertacco dos Santos, Julio Militzer, Iago Lessa de Oliveira |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Dalhousie University, Hospital Israelita Albert Einstein, Albert Einstein Israeli Faculty of Health Sciences |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
medicine.medical_specialty Aerospace Engineering Hemodynamics 02 engineering and technology Computational fluid dynamics Industrial and Manufacturing Engineering Oscillatory shear 020901 industrial engineering & automation Aneurysm Internal medicine medicine Shear stress cardiovascular diseases Hemodynamic effects Physics business.industry Mechanical Engineering Applied Mathematics Aneurysm growth General Engineering Blood flow medicine.disease Automotive Engineering Cardiology cardiovascular system business Intracranial aneurysms |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | In the last two decades, the application of $$\hbox {computational fluid dynamics (CFD)}$$ to study the blood flow in intracranial aneurysms has gained popularity since hemodynamics plays a key role in the inception, growth, and rupture of these aneurysms. Although the rupture event has been the main focus of these studies, other researches have shown the importance of hemodynamics also on the initiation and growth of intracranial aneurysms. However, due to the lack of follow up examinations of a single aneurysm case, these studies are scarcer. In this work, two consecutive examinations of an unruptured lateral aneurysm followed up for 5 years were used to investigate the growth of the aneurysm by using $$\hbox {CFD}$$ . By simulating the flow in these two geometries and in the virtually reconstructed hypothetical healthy vasculature, correlations between hemodynamic parameters and the growth of the aneurysm were evaluated. The results showed that the inception of the aneurysm correlated positively with high $$\hbox {wall shear stress (WSS)}$$ and high positive $$\hbox {WSS}$$ spatial gradient, as other studies also suggest. Furthermore, and most importantly, as different biological pathways may explain the influence of hemodynamics on the growth process, the results also pointed out that the hemodynamic effects that drove the subsequent growth of the aneurysm have changed to a combination of low $$\hbox {WSS}$$ and high $$\hbox {oscillatory shear index (OSI)}$$ . Thus, even though the driving mechanisms observed during each period are distinct, they strongly agree with two main theories that currently explain aneurysm inception and growth. |
| Databáze: | OpenAIRE |
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