Safety and Efficacy Study of Iliac Bifurcation Stent Graft System

Inclusion Criteria: 1. Older than 18 years of age. 2. The subject or its legal representative sign the informed consent. 3. Patients with the aortoiliac aneurysm or the iliac aneurysm and need to endovascular restructure the internal iliac artery. 4. The anatomical structure of the iliac artery meets the following requirements: 1. The length of the anchoring zone of the external iliac artery is ≥15mm. 2. The diameter of the anchoring zone of the external iliac artery is between 7mm and 12mm. 3. The diameter of the external iliac artery is between 6mm-10mm. 4. The length of the anchoring zone of the internal iliac artery is ≥10mm. 5. Life expectancy is longer than one year. Exclusion Criteria: 1. The patient is under 18 years old. 2. Pregnant or lactating woman. 3. The patient had a myocardial infarction or stroke within 3 months. 4. The patient had connective tissue disease, infectious aneurysm, and other active infections. 5. The patient has abdominal aortic aneurysm rupture. 6. The patient has a severe coagulation disorder. 7. Allergic to the material of stent or contrast media. 8. Patient's vascular morphology is not suitable for endovascular repairs, such as serious stricture, dilate, bend, sclerosis, etc. of the iliac artery. 9. Patients with severe mural thrombus in the aneurysm cavity, which may affect the implantation of Branch Stent.