Clinical Research Directory

Inclusion Criteria: 1. Adults aged 19 to 80 years 2. Patients with intracranial aneurysms suitable for endovascular embolization therapy with a maximum diameter of 5mm or less 3. Including both ruptured and unruptured intracranial aneurysms 4. Patients for whom the use of Target Tetra® coil is expected in endovascular coil embolization therapy 5. Patients who have undergone balloon-assisted coiling or adjunctive stent placement during coil embolization 6. Subjects who have received an explanation of the clinical study and provided written consent to participate in the study Exclusion Criteria: 1. Age below 18 or above 81 years 2. Infectious, dissecting, traumatic, or mycotic aneurysms 3. Patients who have undergone surgical or endovascular treatment for the target intracranial aneurysm 4. Patients in whom vascular access to the target intracranial aneurysm is not possible due to conditions such as moyamoya disease, dural arteriovenous malformation, significant atherosclerotic stenosis, or severe vessel tortuosity 5. Patients with ruptured intracranial aneurysms classified as Hunt and Hess grade 5 (deep coma) 6. Patients with hypersensitivity reactions to the materials used in the coils, such as platinum, tungsten, nickel, or stainless steel 7. Patients with serious adverse reactions to contrast agents 8. Patients who are unable to complete planned follow-up observations due to expected short-term survival or comorbidities 9. Female patients who are pregnant (positive pregnancy test) or planning pregnancy within 12 months after coil placement, or breastfeeding 10. Patients with significant renal dysfunction or uncorrected coagulation disorders