目的探讨脑过度灌注的机制和防治措施。
Objective To investigate the mechanism and prevention and treatment of cerebral luxury perfusion syndrome in rats.
结论RI是反映脑血管调节功能的指标，脑动脉RI升高是脑缺血的的表现，RI降低是脑过度灌注的标志，当RI等于1或<0.5时可提示预后较差。
The prognosis is fairly bad when RI equals1or less than0.5. Conclusions:RI is a target reflecting the cerebral vein adjust. RI is the marker of cerebral ischemia.
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