FSI modeling on the effect of artery-aneurysm thickness and coil embolization in patient cases

• Type: Article in International Scientific Journal
• Date: 2021-05-14

Authors

C. Paz (Author) Other; E. Suárez (Author) Other; A. Cabarcos (Author) Other; Sónia I. S. Pinto (Author) FEUP

Journal

Title: Computer Methods and Programs in Biomedicine

Vol. 206

Pages: 1-12

ISSN: 0169-2607

Publisher: Elsevier

Indexing

ISI Web of Knowledge

Scopus

Scientific classification

CORDIS: Technological sciences > Engineering > Mechanical engineering ; Technological sciences > Engineering > Biomedical enginnering

FOS: Engineering and technology > Mechanical engineering ; Engineering and technology > Medical engineering

Other information

DOI: 10.1016/j.cmpb.2021.106148

Abstract (EN): Background and objective: The attainment of a methodology to simulate the hemodynamic in patient-specific cerebral vessels with aneurysms is still a challenge. The novelty of this work is focused on the effect of coil embolization in a realistic cerebral aneurysm, according to the vessel wall thickness and aneurysm thickness, through transient FSI simulations. Methods: The quality of the mesh for simulations was checked with a specific mesh convergence study; and the numerical methodology was validated using numerical research data of the literature. The model was implemented in ANSYS® software. The total deformation and equivalent stress evolution in the studied cases, before and after coil embolization, were compared. More than 20 different models were employed due to different arterial wall thickness and aneurysm wall thickness combinations. Results: The obtained results have showed that deformation and stress values are highly influenced with the sac thickness. The thinner sac aneurysm thickness is, the greater deformation and stress are. The results after coil embolization process have highlighted that considering typical values of arterial wall thickness and aneurysm thickness 0.3 mm and 0.15 mm respectively, a deformation reduction around 50% and a stress reduction around 70% can be achieved. Conclusions: The proposed methodology is a step forward in the personalized medicine, quantifying the aneurysm rupture risk reduction, and helping the medical team in the preoperative planning, or to deciding the optimal treatment. © 2021

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12