A Comparison of Contact Aspiration Versus Stent Retriever for Acute Basilar Artery Occlusion

Exclusion Criteria

• •1. Baseline mRS≥3 points;
• •2. Known or suspected severe basilar artery stenosis (\>70%) or chronic occlusion based on history, imaging, or clinical manifestations;
• •3. Refractory hypertension that is difficult to be controlled by drugs (defined as persistent systolic blood pressure \>185 mmHg or diastolic blood pressure \>110 mmHg)
• •4. Genetic or acquired hemorrhagic tendency, coagulation factor deficiency or on anticoagulant therapy and International Normalized Ratio (INR) \> 3.0;
• •5. Laboratory tests: baseline blood glucose \<50mg/dl (2.8mmol/L) or \>400mg/dl (22.2mmol/L); Baseline platelet count \<50×109/L;
• •6. Known severe allergy (more severe than skin rash) to contrast agents uncontrolled by medications;
• •7. Females who are pregnant, or those of childbearing, potential with positive urine or serum beta Human Chorionic Gonadotropin test;
• •8. Other circumstances that the investigator considers inappropriate for participation in the trial or that may pose significant risks to patients (such as inability to understand and/or follow the study procedures and/or follow up due to mental disorders, cognitive or emotional disorders).
• •1. CT or MR evidence of acute intracranial hemorrhage (the presence of microbleeds on MRI is allowed);
• •2. Midline shift or herniation, mass effect with effacement of the ventricles;
• •3. Complete cerebellar infarct on CT or MRI with significant mass effect and compression of the 4-th ventricle;
• •4. Complete bilateral thalamic infarction on CT or MRI;
• •5. Inability to endovascular treatment due to Excessive tortuosity, variation, or dissection of the artery;
• •6. Subjects with occlusions in both intracranial vertebral arteries;
• •7. Subjects with occlusions in both anterior and posterior circulation;
• •8. Evidence of intracranial tumor (except small meningioma).