What is a cerebral aneurysm? A cerebral aneurysm is an abnormal bulge in the wall of a cerebral artery. Depending on the shape, it can be classified as a saccular aneurysm, a systolic aneurysm, or a lacunar aneurysm. How brain aneurysm occurs Brain aneurysm is generally believed to be related to the following factors: congenital weakness of the vessel wall; impact damage to the vessel wall by high blood pressure; atherosclerosis; and head trauma. What ages do brain aneurysms occur? Brain aneurysms are most common in adults, but can occur at any age, including childhood. Are there any signs of a ruptured brain aneurysm? Generally, brain aneurysm rupture occurs suddenly and without warning. However, the following signs may indicate an increased risk of rupture in patients with brain aneurysms: sudden onset of headache or worsening of headache, nausea, vomiting, changes in vision, and loss of consciousness. Rupture of an intracranial aneurysm can be very serious. Rupture of a cerebral aneurysm leads to subarachnoid hemorrhage, which in turn leads to an increase in intracranial pressure, affecting blood perfusion and cerebral vasospasm further aggravating ischemic brain damage. How to treat ruptured cerebral aneurysm After a ruptured cerebral aneurysm, measures should be taken quickly to restore the damaged brain function, including respiratory support, controlling the blood pressure at normal or slightly above normal level, preventing cerebral vasospasm, and lowering the excessively high intracranial pressure. Interventional endovascular embolization or surgical clamping to reduce the risk of rebleeding is usually done within 3 days. What is endovascular treatment of aneurysm? Endovascular treatment of aneurysm, also known as minimally invasive intervention, involves inserting a thin catheter along the arterial pathway through a percutaneous puncture route (usually the femoral artery) into the aneurysm lumen, and then releasing a filler or a special adhesive into the lumen to achieve the purpose of occluding the aneurysm lumen. What is micro-spring coil therapy? Micro-spring coil therapy is a type of endovascular intervention and is the most common interventional therapy currently used, i.e., a micro-catheter is inserted into the aneurysm cavity through the percutaneous puncture route, and micro-spring coils (the fillers are similar to springs, hence the name “spring coils”) are inserted into the aneurysm cavity along the micro-catheter. Prognosis for patients with ruptured aneurysms The prognosis for patients with ruptured aneurysms depends on the shape and location of the aneurysm, the amount of bleeding that occurs after the rupture, the age of the patient, and the patient’s overall physical condition. The mortality rate for first-time rupture of an aneurysm is as high as 30%, i.e., one-third of patients who rupture an intracranial aneurysm die before they can be treated. Generally speaking, as long as the amount of bleeding is not too large and effective treatment can be provided in a timely manner, a considerable number of ruptured patients can recover completely without any sequelae.