Computational evaluating on the role of sac centerline length on hemorrhage risk of anterior cerebral artery with saccular aneurysm

The present article investigates geometrical features of an aneurysm, particularly the sac centerline length (SCL), in determining the hemodynamic environment within the aneurysm for evaluation of the hemorrhage risk. Indeed, understanding how these geometric characteristics influence blood flow patterns is essential for assessing rupture risk and optimizing treatment strategies. Computational fluid dynamic is used to perform computational modeling of the blood hemodynamic in Anterior Communicating Artery (ACA) cases. Wall shear stress (WSS), Oscillatory Shear Index (OSI) and pressure over sac surface are investigated and compared for selected saccular aneurysm to evaluate risk of aneurysm rupture when sac centerline length is varied. Comparison of the results show that the inverse relationship between sac centerline length and these key hemodynamic parameters (OSI, velocity, WSS) underscores the importance of geometrical factors in assessing aneurysm rupture risk. Longer sac centerline lengths appear to be associated with more stable flow dynamics and reduced mechanical stress, while shorter sac lengths correlate with more disturbed and high-stress conditions.