The neuroendovascular coil is used in the treatment of cerebral aneurysms of different size, shape, and location. The size of coils range in size from about twice the width of a human hair to less than one hair's width. In the process, called as endovascular embolization, blood flow into an aneurysm (a weakened area in the wall of an artery) is blocked. Aneurysm ruptures are known to cause life-threatening bleeding and brain damage. The prevalence of unruptured intracranial aneurysms among adults in Central European countries is estimated at 3.2%. In Germany, around 2 million people suffer from the condition.