Objective: The important factor for successful first-pass complete reperfusion (FPR) after combined techniques for mechanical thrombectomy (MT) is unclear. We consider that for successful FPR, the aspiration catheter (AC) should reach to and hold the thrombus before the device is pulled out. Therefore, we defined an ART (AC reached thrombus) sign characterized by the cessation of reverse blood flow in aspiration pump and deformation of stent retriever (SR) at the tip of AC. The purpose of this study was to identify the impact of the ART sign on the outcomes of the combined techniques.
Methods: A retrospective analysis was conducted between January 2015 and September 2018 on the data of consecutive patients who underwent MT for anterior circulation stroke using both SR and AC at the first-pass procedure. We divided the patients into 2 groups based on whether the first-pass procedure achieved the ART sign (ARTs group) or not (Non-ARTs group). The primary endpoint was FPR defined as modified thrombolysis in cerebral infarction (mTICI) score of 3.
Results: Sixty-six patients were included in our study (n = 38, ARTs group; n = 28, Non-ARTs group). There were no differences at mTICI 2b/3 (97.3% versus 89.2%, P = .30), but the FPR and mTICI3 were more common in the ARTs group (81.5% versus 14.2%, P < .001; and 89.4% versus 32.1%, P < .001, respectively).
Conclusions: ART sign in combined technique was found to be an important factor for successful FPR.
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