Reduction of Microembolism After the Intervention Surgery of Intracranial Aneurysms by Administration of Tirofiban

Inclusion Criteria: * Age was between 18 and 75 years old; * Unruptured aneurysm with surgical indications; * Stent assisted coil embolization treatment was received ; * The patient was willing to receive intervention treatment. Exclusion Criteria: * Complicated with hemorrhagic cerebrovascular diseases such as cerebral vascular malformations and moyamoya disease or their medical history; * Recent (within 1 year) bleeding symptoms such as gastrointestinal bleeding, clinically significant urinary/reproductive tract bleeding, and skin blueness; * Dissecting aneurysm, pseudoaneurysm, and bullous aneurysm; * A known history of coagulation disorders, platelet abnormalities, or thrombocytopenia; 5. Platelet count less than 150 × 109/L； * A history of major surgical procedures or severe physical trauma within one month; * Severe uncontrolled hypertension (systolic blood pressure\>160mmHg and/or diastolic blood pressure\>100mmHg); * Hemorrhagic retinopathy; * Chronic hemodialysis; * Renal insufficiency.