The brainstem auditory evoked potential after injury, brain water contents, Evans blue contents, and pathology in the two models at 1h, 6h, 12h, 24h, 48h, 72h and 168h after craniocerebral injury were regularly observed.

• （4）观察两种模型伤后即刻脑干听觉诱发电位和伤后1h、6h、12h、24h、48h、72h和168h各时相点的脑含水量、伊文氏蓝含量、病理学的改变，了解伤情变化；