Kim B, Jung C, Nam HS, et al. - In this investigation involving 132 individuals who had both computed tomographic angiography and computed tomography perfusion for anterior circulation large artery occlusion 6 to 24 hours after last seen well, researchers analyzed collateral-based triage for endovascular thrombectomy (EVT) in individuals presenting beyond 6 hours, in terms of interrater reliability and effectiveness in anticipating clinical result, in comparison to perfusion-based triage. According to perfusion- and collateral-based triages, study participants were classified into EVT-eligible and EVT-ineligible groups. In 93 individuals, computed tomographic angiography and computed tomography perfusion have been assessable. Based on perfusion- and collateral-based triages, no difference was found in good outcome rates of patients who had EVT in the EVT-eligible groups. According to findings, collateral-based triage displayed good reliability of the interrater and comparable effectiveness to that of perfusion-based triage in anticipating clinical results following EVT in patients presenting beyond 6 hours. In the extended therapeutic time window, collateral-based triage is a reliable approach to selecting patients for EVT.