Hemodynamic Study of In-Stent Stenosis(I) After Flow Diverter(F) Based on 3D-DSA(D) Combined With TCCD(T)

Exclusion Criteria

• •Secondary intracranial aneurysm cases: traumatic aneurysms, infectious aneurysms, or aneurysms associated with arteriovenous malformations (AVM) or vasculitis.
• •Previously treated recurrent aneurysm or target aneurysm with craniotomy clipping surgery or other endovascular interventions.
• •Aneurysms located at the distal end of the circle of Willis where TCCD (Transcranial Color-Coded Doppler) cannot be detected.
• •Known familial clustering history. Expected survival less than 1 year. Preoperative clinical assessment with mRS (Modified Rankin Scale) score ≥ 3. Known allergy or contraindication to antiplatelet drugs, anticoagulants, contrast agents, anesthetics, nitinol memory alloy, platinum-tungsten alloy, or platinum-iridium alloy.
• •Severe respiratory, hepatic, or renal disease (e.g., creatinine ≥ 3.0 mg/dL excluding dialysis) or coagulation disorders.
• •Undergoing major surgery (e.g., limb fracture fixation, tumor resection, major organ surgery, etc.) within 30 days prior to signing informed consent or planned within 60 days after signing informed consent.
• •Pregnant or lactating women, or women with a positive pregnancy test.