Transcranial Doppler measurements of the middle cerebral artery. Effect of hematocrit.
- 1 December 1988
- journal article
- abstracts
- Published by Ovid Technologies (Wolters Kluwer Health) in Stroke
- Vol. 19 (12), 1466-1469
- https://doi.org/10.1161/01.str.19.12.1466
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.Keywords
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