关键词: 颈内动脉; 慢性闭塞; 血管再通治疗; 双腔微导管

Abstract: Objective To explore the feasibility, safety and technical advantages of dual-lumen microcatheter in endovascular recanalization of chronic internal carotid artery occlusion (CICAO). Methods The clinical data of patients with CICAO who were treated with double-lumen microcatheter revascularization at Dalian Municipal Central Hospital from January to December 2020 were retrospectively analyzed. The immediate postoperative revascularization (mTICI), any stroke events (including ischemic and hemorrhagic stroke) and stent re-occlusion were observed at 30 days and during the 6- to 10-month after the procedure. Results A total of 6 eligible patients aged 43 to 83 years were included, with 5 males (83.3%)and 1 female (16.7%). There was 1 (16.7%) case with long segmental occlusion (occluded segment extending from the initial segment of internal carotid artery to above the distal C5 segment). The clinical presentation was ischemic stroke in 5 cases (83.3%) and recurrent TIA in 1 case (16.7%). Preoperative NIHSS scores ranged from 1 to 5, and mRS scores ranged from 1 to 2. All patients (6/6, 100%) achieved mTICI grade 3 recanalization after the procedure. 2 cases (33.3%) had residual stenosis <20% and 4 cases (66.7%) had residual stenosis <10% after the procedure. There were no stroke or death events during the follow-up period, and mRS score at the 6-month follow-up was 0-1. Conclusions Dual-lumen microcatheter for revascularization of chronic occlusion of internal carotid artery may be safe and effective.

Key words: Internal carotid artery; Chronic occlusion; Vascular recanalization; Double-lumen microcatherter