<unk>  is used to treat cerebral aneurysms. The main goal is prevention of rupture in unruptured aneurysms, and prevention of rebleeding in ruptured aneurysms by limiting blood circulation to the aneurysm space. Clinically, packing density is recommended to be 20-30% or more of the aneurysm's volume, typically requiring deployment of multiple wires. Higher volumes may be difficult due to the delicate nature of the aneurysm; intraoperative rupture rates are as high as 7.6% for this procedure. In ruptured aneurysms,<unk>  is performed quickly after rupture because of the high risk of rebleeding within the first few weeks after initial rupture. The patients most suitable for<unk>  are those with aneurysms with a small neck size (preferably <4 mm), luminal diameter <25 mm and those that are distinct from the parent vessel. Larger aneurysms are subject to compaction of coils, due to both looser packing densities (more coils are needed) and increased blood flow. Coil compaction renders them unsuitable as they are incapable of stemming blood flow. However, technological advances have made<unk>  of many other aneurysms possible as well. Results A number of studies have questioned the efficacy of<unk>  over the more traditional surgical clipping. Most concerns involve the chance of later bleeds or other recanalization. Due to its less invasive nature,<unk>  usually presents faster recovery times than surgical clipping, with one study finding a significant decrease in probability of death or dependency compared to a neurosurgical population. Complication rates for<unk>  as well are generally found to be lower than microsurgery (11.7% and 17.6% for<unk>  and microsurgery, respectively). Despite this, interoperative rupture rates for<unk>  have been documented as being as high as 7.6%. Clinical results are found to be similar at a two-month and one year follow-up between<unk>  and neurosurgery. Reported recurrence rates are quite varied, with rates between 20-50% of aneurysms recurring within one year of<unk> , and with the recurrence rate increasing with time. These results are similar to those previously reported by other endovascular groups. Other studies have questioned whether new matrix coils work better than bare platinum coils. The International Subarachnoid Aneurysm Trial tested the efficacy of<unk>  against the traditional micro-surgical clipping. The study initially found very favorable results for<unk> , however its results and methodology were criticized. Since the study's release in 2002, and again in 2005, some studies have found higher recurrence rates with<unk> , while others have concluded that there is no clear consensus between which procedure is preferred.
Endovascular coiling
Endovascular aneurysm repair
Hemipelvectomy
Angioplasty
Thrombectomy
Electrothermal bipolar vessel sealing
Embolectomy
Endarterectomy