Average blood flow rate of arteriole decreased 0.9 mm / s venulae decreased 0.7 mm / s cerebral volume of blood fiow droped 50 % or over as compared with the control group ( P < 0.01 ) .

血流中有 较多 白色微小 血栓；细动脉血流速度平均比 正常状态 减慢 0.9mm/s， 细 静脉流速减慢0.7mm/s，脑血流量可下降50%以上（P<0.01）。