To investigate Leo Stent assisted coil embolizatinn of complex intracranial aneurysms

Abstract

Objective Endovascular treatment of complex and broad-necked aneurysms remains a challenge for the neurovascular physician despite accelerated progress in technology and experience. The Leo stent is a new retractable self-expandable stent. The purpose of this study was to evaluate the feasibility and flexibility of the stent. Method Forty-five complex and broad-necked intracranial aneurysms in 41 patients were treated electively. They were located at the cavernous carotid artery (3),internal carotid artery ophthalmic artery segment(5), internal carotid artery posterior communicating artery segment (23), internal carotid artery bifurcation(1), vertebral artery(8), basilar artery(5). Mean aneurysm size was 7.1 mm. Mean neck size of aneurysms was 4.8 mm. Results There were 31 (69%) aneurysm occlusions, 8 (18%) residual aneurysms, and 6 (13%) neck remnants. Stent deployment was successful in all lesions. Clinical follow up was available in 41 patients. Angiographic follow up was available in 29 patients with 31 aneurysms. There were one thromboembolic events related to the deployment of the Leo stent, two asymptomatic parent artery occlusion, one symptomatic parent artery occlusion, and one intracerebral hematoma. Conclusions Primary treatment of complex and broad-necked intracranial aneurysms using the Leo stent is feasible and effective. Although results at follow-up are encouraging, further studies are needed to evaluate the long-term stability of aneurysmal occlusion and tolerance to the stent. Key words: Endovascular therapy; Intracranial aneurysm; Stent