Prevalence, Geometry, and Hemodynamics of Small and Medium-Sized Intracranial Aneurysms With and Without Blebs in the Chinese Han Population

作者：Xiaopeng Cui, Yan Zhao, Liang Wang, Yujing Jin, Zhenglong Yang, Yaohua Li, Zilin Zhao, Hengrui Zhang, Kai Wei, Zhennan Sun, Peng Huai, Lei Chen, Xinyu Yang · 发表于：Journal of Central Nervous System Disease · 年份：2025 · DOI：10.1177/11795735251364919 · 被引用次数：2 · 研究领域：Intracranial Aneurysms: Treatment and Complications、Vascular Malformations Diagnosis and Treatment、Meningioma and schwannoma management

Background Blebs are small bulges on the surface of intracranial aneurysms (IAs) that increase rupture risk. Among Chinese individuals, the prevalence, distribution, and clinical, geometric, and local hemodynamic characteristics of small- and medium-sized (<15 mm) blebbed IAs remain unclear. Objectives To investigate the prevalence, distribution, and associated clinical, geometric, and hemodynamic features of blebs in small- and medium-sized IAs among Chinese patients, and to identify predictors of aneurysm rupture and bleb formation. Design A retrospective observational study. Methods CTA or DSA data from 214 patients with ruptured (RIAs) and unruptured IAs (UIAs) (<15 mm), with or without blebs, were analyzed. Three-dimensional reconstruction, geometric measurement, and computational fluid dynamics (CFD) analysis were conducted using Mimics and ANSYS Fluent. Hemodynamic parameters were assessed across the neck, body, and dome, and logistic regression was used to identify predictors of rupture and bleb formation. Results Aneurysms from 214 patients (93 men, 121 women; mean age 59.90 ± 11.76 years) were analyzed. Blebs were found in 107 aneurysms (56.7% of RIAs, 39.1% of UIAs). They were more frequent in ACoA, PCoA, and bifurcation aneurysms (all P < 0.05) and were associated with rupture. RIAs had larger blebs than UIAs (2.73 ± 1.28 mm vs 2.06 ± 1.07 mm, P = 0.009). Blebbed IAs exhibited larger size, more irregular shape, higher AR, SR, BN, HWR, and lower NWSS, TAWS...