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Corrected Whole Blood Biomarkers - the Equation of Dill and Costill Revisited

Overview
Journal Physiol Rep
Specialty Physiology
Date 2018 Jun 26
PMID 29939499
Citations 22
Authors
Pekka Matomaki
Heikki Kainulainen
Heikki Kyrolainen
Affiliations
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Abstract

An exercise bout or a dehydration often causes a reduction in plasma volume, which should be acknowledged when considering the change in biomarkers before and after the plasma changing event. The classic equation from Dill and Costill (1974, J. Appl. Physiol., 37, 247-248) for plasma volume shift is usually utilized in such a case. Although this works well with plasma and serum biomarkers, we argue in this note that this traditional approach gives misleading results in the context of whole blood biomarkers, such as lactate, white cells, and thrombocytes. In this study, we demonstrate that to calculate the change in the total amount of circulating whole blood biomarker, one should utilize a formula [Formula: see text] Here Hb and BM are, respectively, the concentrations for the hemoglobin and for the inspected whole blood biomarker before (pre) and after (post) the plasma changing incident.

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