Long-term Follow-up Angiography of Intracranial Aneurysms Treated with Cook Detachable Coil System

The long-term outcome of detachable coil embolization of cerebral aneurysms is still unknown. The purpose of this study was to evaluate the stability of the anatomic occlusion of aneurysms treated with the Cook detachable coil system and assess the rate of recanalization and recurrence. A study involving 250 patients with 271 ruptured aneurysms treated with the Cook detachable system between January 1997 and September 2003 who subsequently underwent six month, one year and two year follow-up angiography were enrolled in the study. Angiographic findings were reviewed to determine the percentage of aneurysm occlusion. Long-term follow-up angiograms (at two years) demonstrated complete occlusion in 75% of cases, and subtotal occlusion in 25% of cases. Overall morbidity was 7.3%, aneurysm recurrence 3.2%, and aneurysm re-treatment 3.2%. Recurrent subarachnoid hemorrhage occurred in only one patient. Angiographic follow-up demonstrated the stability and durability of treatment with the Cook detachable coil system.