Transcranial Doppler measurements of the middle cerebral artery. Effect of hematocrit.
作者信息
Brass L M, Pavlakis S G, DeVivo D, Piomelli S, Mohr J P
机构信息
Neurological Institute of New York, Columbia--Presbyterian Medical Center, New York.
出版信息
Stroke. 1988 Dec;19(12):1466-9. doi: 10.1161/01.str.19.12.1466.
PMID:3059585
Abstract
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.
摘要
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