Related Experiment Video
Updated: Jul 6, 2026

Microsurgical Clip Obliteration of Middle Cerebral Aneurysm Using Intraoperative Flow Assessment
Published on: September 25, 2009
Risk factors for the persistence of unruptured intracranial vertebral artery dissecting aneurysms treated with flow
Jiangli Han1, Xiaobo Li1, Hao Niu2
1Department of Neurosurgery, Affiliated Haikou Hospital, Xiangya School of Medicine, Central South University, No.43 Renmin Avenue, Meilan District, Haikou, 570208, Hainan Province, China.
Abstract:
Flow diverters (FDs) have been employed in the treatment of unruptured intracranial vertebral artery dissecting aneurysms (IVADAs), yielding seemingly favorable outcomes. Despite FD treatment, aneurysm persistence (incomplete occlusion post-initial treatment) can occur in some patients, potentially leading to recurrent symptoms or complications. This study aims to explore the risk factors associated with the persistence of unruptured IVADAs that have undergone treatment with FDs. The study encompassed 77 unruptured IVADAs from 75 consecutive patients who received treatment with FDs. At a median follow-up of 13 months, 31.2% (24/77) of IVADAs exhibited persistence. Upon multivariate logistic regression analysis, significant pre-procedural stenosis adjacent to aneurysmal dilatation (odds ratio [OR] 17.02, 95% confidence interval [CI] 2.01-144.24, p = 0.009) and posterior inferior cerebellar artery involvement (OR 7.06, 95% CI 1.40-35.50, p = 0.018) were independently associated with aneurysm persistence; while follow-up duration (OR 0.91, 95% CI 0.84-0.97, p = 0.005) was adversely associated with aneurysm persistence. Significant pre-procedural stenosis adjacent to aneurysmal dilatation and posterior inferior cerebellar artery involvement could serve as independent risk factors contributing to the persistence of unruptured IVADAs after FD treatment..
More Related Videos
Related Concept Videos
Aneurysm I: Introduction
Aneurysm II: Clinical Manifestations and Diagnostic Studies
Aneurysm III: Interprofessional Care
Hemorrhagic Stroke l: Introduction

