Tangdu Hospital,Fourth Military Medical University, Xi'an 710038,China;
Tangdu Hospital,Fourth Military Medical University, Xi'an 710038,China;
Shangluo Hospital,Shangluo 726000,China;
89th Hospital of PLA,Weifang 261021,China;
subarachnoid hemorrhage; cerebral vasospasm; cerebral blood flow; neurological disorders; animal models;