Angiographically determined aneurysm recurrence was less common with hydrogel-coated than with bare-platinum coils, but clinical relevance remains unclear.
One limitation of using detachable platinum coils for the endovascular treatment of brain aneurysms is the substantial rate of aneurysm recurrence within a year. Aneurysms can recur when coils become compacted in the aneurysm sac or when the aneurysm wall expands. Larger aneurysms, wider necks, and locations with direct-flow impingement are associated with increased risks for recurrence after treatment with coils. Deciding whether to retreat a recurrent aneurysm depends on anatomic factors, including size, location, and relationship with branch arteries, and on clinical factors, including whether the aneurysm has ruptured in the past. These researchers sought to determine the rate of aneurysm recurrence after endovascular treatment with a h…