To set up the cerebral ischemic model, we retrogradely catheterized the external carotid artery, temporarily clipped the common carotid artery, then injected the autocoagnlated clot.
缺血组采用颈外动脉逆行置管，暂时夹闭颈总动脉，由导管内注入自体血凝块，建立脑缺血模型。
A blood clot is seen over the external surface of the dura. Thus, this is an epidural hematoma.
硬脑膜外表面可见一血块，此为硬膜外血肿。
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