Clinical outcomes of mechanical thrombectomy for acute M2 occlusion

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  • 中大脳動脈M2急性閉塞に対する脳血栓回収療法の治療成績の検討

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Abstract

<p> Background and Purpose: Although mechanical thrombectomy (MT) has been performed for the treatment of middle cerebral artery (MCA) M2 occlusion on a case-by-case basis, its efficacy and safety have not been established. We reviewed the results of the treatment of patients with M2 occlusion through MT to elucidate the efficacy and safety of MT. Methods: Patients with M1 or M2 occlusion and those treated with MT at our hospital between March 2014 and January 2022 were selected (M1: 93 patients, M2: 68 patients). The efficacy and safety of the treatment were examined. Results: The rate of successful recanalization (TICI≥2b) was higher in the M1 occlusion group (90.3% vs. 73.5%), and the rate of intracranial hemorrhage was high in the M2 occlusion group (14% vs. 38.2%). The incidence of subarachnoid hemorrhage was higher in the M2 occlusion group (38.2% vs. 6.5%), and the rate of developing subarachnoid hemorrhage was higher in patients with a large number of passes and in patients who underwent stent retriever alone even once. Conclusions: In the M2 occlusion group, MT appears to be effective as good recanalization increases the proportion of patients with good functional outcomes. However, given that intracranial hemorrhage is complicated in a high number of patients, counter measures are important.</p>

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