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High cerebral blood flow velocity (CBFv) and low haemoglobin oxygen saturation (SpO(2)) predict neurological complications in sickle cell anaemia (SCA) but any association is unclear. In a cross-sectional study of 105 Kenyan children, mean CBFv was 120 +/- 34.9 cm/s; 3 had conditional CBFv (170-199 cm/s) but none had abnormal CBFv (>200 cm/s). After adjustment for age and haematocrit, CBFv > or =150 cm/s was predicted by SpO(2) < or = 95% and history of fever. Four years later, 10 children were lost to follow-up, none had suffered neurological events and 11/95 (12%) had died, predicted by history of fever but not low SpO(2). Natural history of SCA in Africa may be different from North America and Europe.

Original publication

DOI

10.1111/j.1365-2141.2009.07660.x

Type

Journal article

Journal

Br J Haematol

Publication Date

05/2009

Volume

145

Pages

529 - 532

Keywords

Anemia, Sickle Cell, Blood Flow Velocity, Cerebrovascular Circulation, Child, Child, Preschool, Cross-Sectional Studies, Fever, Hematocrit, Hemoglobins, Humans, Kenya, Multivariate Analysis, Odds Ratio, Oximetry, Oxygen, Risk, Risk Factors, Stroke, Ultrasonography, Doppler, Transcranial