近年来 ,一氧化氮 (ＮＯ)在脑缺血及再灌注损伤中的作用争论颇多 ,本研究通过测定脑缺血及再灌注不同进期大鼠脑组织中ＮＯ代谢物ＮＯ-Ｘ 的含量 ,结合电镜观察脑组织超微结构的改变 ,探讨ＮＯ在脑缺血及再灌注损伤中的作用规律 ,为临床再灌注治疗提供依据。1　材料与方法1.1　 In recent years, nitric oxide (NO) in the role of cerebral ischemia and reperfusion injury in a lot of debate in this study by measuring the different stages of cerebral ischemia and reperfusion NO metabolites in rats NO-X content , Combined with electron microscopy to observe changes in brain ultrastructure to explore the role of NO in cerebral ischemia and reperfusion injury in the law for the clinical treatment of reperfusion provide the basis. 1 Materials and Methods 1.1