Results Cerebral blood stream velocity was expedited, and plasticity index(PI) and resistance index(RI) of blood vessel was augmented when ICP increased.

• 结果颅内压轻度升高时脑血流速度增快,血管脉动指数及阻力指数增大,随着颅内压进一步升高,血流速度迅速减慢。