RESUMO
CONTEXT: New stroke thrombectomy devices have significantly improved recanalization rates in patients with large vessel occlusion. The first pass effect, or complete or near complete recanalization after a single pass of a device, is associated with better outcome. However, it remains unclear whether one technique is superior to the others at first pass recanalization. OBJECTIVE: The successful recanalization rates of three common techniques: 1) Stent-retriever with the Solitaire or 2) Trevo device, or 3) primary aspiration (PA) with a distal aspiration catheter, were compared across three Kaiser Permanente Southern California Medical Centers over a 5-year period. DESIGN: Retrospective review of cases between October 2013 and May 2018. MAIN OUTCOME MEASURE: Successful recanalization after a single pass of a device. RESULTS: Forty-five percent of Solitaire thrombectomies resulted in first pass success, compared with 31% of Trevo and 39% of PA, not statistically significant (p = 0.26). Adjusted for age, gender, and National Institutes of Health Stroke Scale score, the odds of successful recanalization were 1.90 ± 0.72 (CI 0.90-3.99, p = 0.09) for Solitaire compared with Trevo, and 1.41 ± 0.50 (CI 0.70-2.84, p = 0.33) for aspiration compared with Trevo. CONCLUSION: In this multi-center cohort, there was no statistical difference in successful first pass recanalization between Solitaire, Trevo, and PA. However, there was a trend towards improved efficacy with the Solitaire device compared to Trevo (OR 1.90, p = 0.09). Additional data are needed to determine the conditions under which design differences may favor one technique over another.