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SMART coils for intracranial aneurysm embolization: Follow-up outcomes.
Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia 2018 November 8
The SMART coil (Penumbra Inc., Alameda, CA, USA) is a new microcoil designed to enhance deliverability. Although prior studies have described its perioperative safety and efficacy, the follow-up outcomes after embolization of intracranial aneurysms using SMART coils have not been reported. Therefore, the aim of this retrospective cohort study is to assess the angiographic outcomes at interim follow-up after aneurysm embolization with SMART coils. We reviewed data from consecutive patients with intracranial aneurysms who underwent endovascular treatment using SMART coils between June 2016 and August 2017. Baseline data and follow-up angiographic outcomes using the modified Raymond-Roy classification (MRRC) were recorded. The study cohort comprised 33 patients with 34 aneurysms who underwent SMART coil embolization and had sufficient follow-up data. The mean age was 57 years, and 82% were female. The mean aneurysm maximum diameter and neck width were 6.1 ± 2.2 mm and 3.2 ± 1.2 mm, respectively, and 14.7% of aneurysms were ruptured. The overall complication rate was 12%. Initial mean coil packing density was 26%, and the initial MRRC was I, II, IIIa, and IIIb in 24%, 26%, 35%, and 15%, respectively. At last follow-up (mean duration 7.7 ± 3.2 months), the MRRC was I, II, IIIa, and IIIb in 62%, 26%, 3%, and 9%, respectively. The retreatment rate was 14.7%. The SMART coil is efficacious for the treatment of appropriately selected aneurysms, with an acceptable risk profile. The majority of residual aneurysms after the initial embolization procedure will progress to complete or near-complete occlusion at interim follow-up.
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