Brass L M, Pavlakis S G, DeVivo D, Piomelli S, Mohr J P
Neurological Institute of New York, Columbia--Presbyterian Medical Center, New York.
Stroke. 1988 Dec;19(12):1466-9. doi: 10.1161/01.str.19.12.1466.
We evaluated the effects of hematocrit on blood velocity in the middle cerebral artery measured by transcranial Doppler ultrasonography in 45 patients. Hematocrits ranged from 16% to 46%, and systolic blood velocities ranged from 70 to 190 (mean 40 to 140) cm/sec. Decreases in hematocrit correlated with increases in blood velocity in the middle cerebral artery. These results suggest that transcranial Doppler measurements made in the presence of anemia may need correction.
我们评估了血细胞比容对45例患者经颅多普勒超声测量大脑中动脉血流速度的影响。血细胞比容范围为16%至46%，收缩期血流速度范围为70至190（平均40至140）厘米/秒。血细胞比容降低与大脑中动脉血流速度增加相关。这些结果表明，在贫血情况下进行的经颅多普勒测量可能需要校正。
