方法：应用高分辨率超声检测血流介导的血管扩张（FMD）及硫代巴比妥法测定丙二醛（MDA）。

Methods:Flow mediated dilation (FMD) was tested with high resolution ultrasound method and malondialdehyde (MDA) was detected by using thiobarbituric acid reactive substances (TBARS).

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苯妥英钠对缺血性脑损伤的神经保护作用与其能抑制自由基形成，减轻自由基介导的毒性，抗脂质过氧化反应以及扩张血管，增加局部脑血流量有关。

Phenytoin sodium may protect brain tissues from cerebral ischemic injury by inhibiting formation of free radical, anti-lipid peroxidation and improving regional cerebral blood flow.

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