Abstract 110: Thrombectomy With Longer Stent Retrievers Increases Rates of First-pass Reperfusion

Background: Longer stent retrievers have become recently available and may enhance device purchase distal to the clot (increasing chances of rolling clot out) and prevent misplacement. We aim to evaluate if the device length impacts reperfusion rates in stroke thrombectomy. Methods: Retrospective analysis of a prospectively collected databank. Inclusion: thrombectomies in which 4mm stent-retrievers were used as the first-line strategy from Sep2010-Mar2017. Population was dichotomized into Long (Trevo4x30mm/Solitaire4x40mm) or Short (Trevo4x20mm/ Solitaire4x20mm) retrievers. Primary outcome was first-pass reperfusion (modified TICI2b-3 with first pass). Results: Of 1204 thrombectomies within the study period, 594 were included. Age, gender, NIHSS, ASPECTS, and IV-tPA use (41vs41%;p=1.00) were comparable between groups. Long device arm included more MCA M1 [72vs60%;p<0.01], less M2 [10vs17%;p=0.02] and basilar artery [4vs11%;p<0.01] occlusions. Occlusion site was comparable for intracranial carotid and Tand...