Brain aneurysm stenting is performed when wide-necked brain aneurysms are treated with endovascular coils. Wide-necked aneurysms are characterized by a large opening to the blood vessel on which they formed. The large opening makes these aneurysms prone to coil herniation, or displacement of coils from the aneurysm into the adjacent blood vessel. Coil herniation may cause serious complications. Stents are small, flexible, tube-like devices used to prop open and support vessels. In this procedure, the stent is intended to help hold the coils within the aneurysm to prevent coil herniation.
