Abstract
Polycythemia is associated with an increased incidence of cerebral hemorrhage and neurodevelopmental abnormalities. Material and Methods: Whole blood and plasma viscosity (capillary viscosimeter), RBC deformability (rheoscope) and aggregation (Myrenne Aggregometer), cerebral and peripheral blood flow (plethysmography and Doppler sonography) and plasma volume (Evans blue) were studied in 21 neonates with gestational ages of 35-41 weeks. Results: The neonates were divided into two groups according to the hematocrit (group I: < .65 1/1, n=13; group II:≥65 1/1, n=8) P =art. pressure (mmHg); RBC =red blood cells: * p<.05, ** p<.005 Conclusions: Cerebral RBC flow is not affected by hematocrit, plasma volume or blood volume. The effect of V on vascular resistance is partially counterbalanced by decreasing vascular hindrance (i.e. by vasodilatation).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
