A proposed parent vessel geometry—based categorization of saccular intracranial aneurysms: computational flow dynamics analysis of the risk factors for lesion rupture

Abstract

The application of standardized categories enables the comparison of results for various aneurysms' geometric formations, thus assisting in their management. The proposed classification system may provide a promising means of understanding the natural history of saccular intracranial aneurysms.

Unruptured intracranial aneurysms and the assessment of rupture risk based on anatomical and morphological factors: sifting through the sands of data

“…14,16 However, due to the variability of aneurysm height, the aspect ratio has been found in most studies to be statistically significant between unruptured and ruptured aneurysms, thus provided another valuable parameter in addition to size and location. With few exceptions, 4,5 a higher aspect ratio has been associated with ruptured lesions (Table 2).…”

Risk Analysis of Unruptured Aneurysms Using Computational Fluid Dynamics Technology: Preliminary Results

“…[8][9][10] The influence of parent vessel geometry was reported by Hassan et al 11 Castro et al 12 highlighted the importance of proper modeling for the proximal portions of the parent vessel, a procedure that can strongly influence the results on the basis of the aneurysm orifice and parent artery shape. Hoi et al 13 demonstrated the effect of arterial geometry on the growth of the aneurysm: More tortuous arteries and wide-neck aneurysms were subjected to higher hemodynamic stresses, particularly on the distal parts of the neck.…”

Quantitative Hemodynamic Analysis of Brain Aneurysms at Different Locations

“…5 Vascular geometry, branching angles, and surrounding anatomic structures, the features used to identify and specify an aneurysm, have previously been studied to find their relationships with the natural history of aneurysms. [6][7][8] Analyzing differences in parent artery geometry revealed that aneurysms with a large caliber of the proximal artery tended to rupture at a larger size. 6 Bifurcations beyond the circle of Willis approximated optimality principles, unlike those within the circle of Willis.…”