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American Journal of Clinical Nutrition, Vol 37, 307-310, Copyright © 1983 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

The use of capillary blood for measurements of circulating ferritin

P Pootrakul, BS Skikne and JD Cook

The accuracy and reproducibility of using stored capillary blood for measurements of circulating ferritin were evaluated by comparison with simultaneous measurements on venous blood. In an initial study, the between- and within-sample variability of capillary determinations was about three times higher than with venous measurements, but the difference was reduced considerably by using capillary serum rather than plasma. With both serum and plasma, the mean ferritin in capillary specimens was 3 to 5% higher than in venous blood. These minor drawbacks with capillary measurements are outweighed by the benefit of improved compliance in prevalence surveys when finger-stick sampling can be used in place of venipuncture.


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 Am. J. Clin. Nutr.Home page
J. Monarrez-Espino and T. Greiner
Measuring serum ferritin under field conditions
Am. J. Clinical Nutrition, November 1, 2002; 76(5): 1138 - 1138.
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 Am. J. Clin. Nutr.Home page
N. Ahluwalia, S. Atukorala, and A. de Silva
Reply to J Monarrez-Espino and T Greiner
Am. J. Clinical Nutrition, November 1, 2002; 76 (5): 1138 - 1139.
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Copyright © 1983 by The American Society for Nutrition