Comparative hemodynamic assessment of saccular and fusiform aneurysms in patient-specific internal carotid artery models: Rupture risk analyses.

This article focuses on a comparative computational fluid dynamics (CFD) analysis of hemodynamic parameters in patient-specific models of saccular, fusiform, and normal internal carotid arteries (ICA) to assess aneurysm rupture risk. Using transient, laminar, non-Newtonian blood flow simulations under two pulsatile inlet profiles, the study evaluates wall shear stress (WSS), velocity, oscillatory shear index (OSI), and pressure drop across these morphologies. Results indicate that the normal artery exhibits the highest WSS and flow velocity, suggesting a stable but high-shear environment; the fusiform aneurysm shows the lowest WSS and velocity but the highest OSI, reflecting disturbed flow; and the saccular aneurysm presents the greatest pressure drop and evidence of flow recirculation, implying increased flow resistance. These findings underscore the influence of aneurysm shape and pulsatile flow conditions on vascular hemodynamics, which are critical for personalized risk assessment and treatment planning.