Contrast extravasation and outcome of endovascular therapy in acute ischaemic stroke: a systematic review and meta-analysis
Tao Xu, You Wang, Jinxian Yuan, Yangmei Chen, Haiyan Luo
Abstract
OBJECTIVE: Contrast extravasation (CE) after endovascular therapy (EVT) is commonly present in acute ischaemic stroke (AIS) patients. Substantial uncertainties remain about the relationship between CE and the outcomes of EVT in patients with AIS. Therefore, we aimed to evaluate this association. DESIGN: A systematic review and meta-analysis of published studies were performed. DATA SOURCE: We systematically searched the Medline and Embase databases for relevant clinical studies. The last literature search in databases was performed in June 2020. ELIGIBILITY CRITERIA FOR STUDY SELECTION: We included studies exploring the associations between CE and the outcomes of EVT in patients with AIS undergoing EVT. DATA EXTRACTION AND SYNTHESIS: statistic with 95% CIs. RESULTS: Fifteen observational studies that enrolled 1897 patients were included. Patients with CE had higher risks of poor functional outcome at discharge (2.38, 95% CI 1.45 to 3.89 p=0.001; n=545) and poor functional outcome at 90 days (OR 2.16, 95% CI 1.20 to 3.90; n=1194). We found no association between CE and in-hospital mortality (OR 0.95, 95% CI 0.27 to 3.30; n=376) or 90-day mortality (OR 1.38, 95% CI 0.81 to 2.36; n=697) after EVT. Moreover, CE was associated with higher risks of post-EVT intracranial haemorrhage (ICH) (OR 6.68, 95% CI 3.51 to 12.70; n=1721) and symptomatic ICH (OR 3.26, 95% CI 1.97 to 5.40; n=1092). CONCLUSIONS: This systematic review and meta-analysis indicates that in patients with AIS undergoing EVT, CE is associated with higher risks of unfavourable functional outcomes and ICH. Thus, we should pay more attention to CE in patients with AIS undergoing EVT.