ICP averaged 24.7 ± 11.01 mmHg at the first day, pulsatility index of 1.53 ± 1.01, (r = 0.78); at the 5th day, 16.86 ± 4.08 mmHg and 0.85 ± 0.64 respectively (r = 0.77); at the 10thday, 12.9 ± 3.74 mmHg and 0.70 ± 0.32, respectively (r = 0.35); in those with ICP > 20 mmHg were hightly correlated (r = 0.77), in contrast of the another group of intracranial pressure <20 mmHg the correlation was low (r = 0.22).