This study will compare the efficacy and safety of the transradial approach versus the transfemoral approach for performing full cerebral angiography. Participants will undergo cerebral angiography via one of the two approaches and will be followed up during and after the procedure. The primary endpoint of this study is to evaluate the success rate of completing full cerebral angiography (including superselective catheterization of bilateral common carotid arteries, subclavian arteries near the vertebral artery origin, and the aortic arch) via the transradial approach versus the transfemoral approach. During the study, the medical team will also document procedural details, incidence of complications, patient comfort, and related costs to comprehensively evaluate the clinical performance differences between the two approaches.
Age > 18 years;
Patients requiring full cerebrovascular angiography;
Objective evidence indicates the patient is suitable for transfemoral or transradial cerebrovascular angiography, with upper limb vascular ultrasound 4.showing a radial artery internal diameter ≥ 1.5 mm;
Positive right Allen's test/Barbeau test; femoral artery occlusion (for the TFA group);
Local infection or trauma at the puncture site;
Coagulation abnormalities: INR > 1.5 or platelet count < 50 × 10⁹/L;
Presence of access vessel disease or anatomical variation deemed potentially hazardous to the subject, such as aortic arch interruption, subclavian artery occlusion, or aortic dissection;