• Guojuan Chen, Anxin Wang, Xiaoli Zhang, Yuhao Li, Xue Xia, Xue Tian, Jing Li, Zhongrong Miao, and Wei Yue.
• Department of Neurology, Clinical College of Neurology, Neurosurgery, and Neurorehabilitation, Tianjin Huanhu Hospital, Tianjin Medical University, No.6 Jizhao Road, Shuanggang Town, Jinnan District, Tianjin, 300350, China.
• Neurocrit Care. 2024 Aug 1; 41 (1): 165173165-173.

BackgroundFrequent incidence of futile recanalization decreases the benefit of endovascular treatment (EVT) in acute ischemic stroke. We hypothesized that the inflammation and immune response after ischemic are associated with futile recanalization. We aimed to investigate the correlation of admission systemic immune-inflammation index (SII) with futile recanalization post EVT.MethodsPatients with successful recanalization (modified Thrombolysis in Cerebral Ischemia angiographic score 2b-3) and maintained artery recanalized after 24 h of EVT were chosen from a prospective nationwide registry study. Futile recanalization was defined as a poor functional outcome (modified Rankin Scale score 3-6) at 90 days, irrespective of a successful recanalization. At admission, SII was calculated as (platelet count × neutrophil count)/lymphocyte count/100. Logistic regression analysis helped to test the relationship of SII with futile recanalization.ResultsAmong the 1,002 patients included, futile recanalization occurred in 508 (50.70%). No matter whether tested as quartiles or continuous variables, SII was significantly associated with futile recanalization (P < 0.05), and for every one standard deviation increase of SII, the risk of futile recanalization elevated by 22.3% (odds ratio 1.223, 95% confidence interval 1.053-1.444, P = 0.0093). Moreover, no significant interactions could be observed between SII or SII quartiles and age, baseline National Institutes of Health Stroke Scale scores, onset-to-recanalization time, and modified Thrombolysis in Cerebral Ischemia angiographic scores (all P for interaction > 0.05).ConclusionsEarly SII elevation was associated with an increased risk of futile recanalization among patients with EVT. Our results indicated that therapeutic drug targeting hyperreactive immune-inflammation response might be helpful for reducing the incidence of futile recanalization.© 2024. Springer Science+Business Media, LLC, part of Springer Nature and Neurocritical Care Society.

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