Adjuvant Tirofiban Injection Through Deployed Solitaire Stent As a Rescue Technique After failed Mechanical Thrombectomy in Acute Stroke

PURPOSE We present our experiences of intra-arterial tirofiban injection through a deployed Solitaire stent as a rescue therapy after failed mechanical thrombectomy in patients with acute ischemic stroke. MATERIALS AND METHODS Data on 18 patients treated with adjunctive tirofiban injection through a temporarily deployed Solitaire stent after failed mechanical thrombectomy were retrospectively reviewed. Solitaire stent was used as a primary thrombectomy device in 16 of 18 patients. Two patients received manual aspiration thrombectomy initially. If initial mechanical thrombectomy failed, tirofiban was injected intra-arterially through the deployed Solitaire stent and then subsequent Solitaire thrombectomy was performed. RESULTS Fourteen patients had occlusions in the middle cerebral artery, 2 in the distal internal carotid artery, and 2 in the basilar artery. Successful recanalization was achieved in 14 patients (77.7%) after intra-arterial injection of tirofiban and subsequent Solitaire thrombectomy. Three patients without successful recanalization after rescue method received angioplasty with stenting. Overall, successful recanalization (TICI grades 2b and 3) was achieved in 17 (94.4%) of 18 patients. Periprocedural complications occurred in 5 patients: distal migration of emboli in 5 patients and vessel perforation in 1. Three patients died. Good functional outcome (mRS ≤ 2) was achieved in 9 patients (50.0%) at 3 months. CONCLUSION Rescue intra-arterial injection of tirofiban through a temporarily deployed Solitaire stent may facilitate further recanalization in cases of failed mechanical thrombectomy in patients with acute ischemic stroke.