Specific Gravity of Blood and Plasma at 4 and 37 °C

DOI PDF 13 Citations
  • Raymond J Trudnowski
    Department of Anesthesiology, Roswell Park Memorial Institute, New York State Department of Health, 666 Elm St., Buffalo, N. Y. 14203
  • Rodolfo C Rico
    Department of Anesthesiology, Roswell Park Memorial Institute, New York State Department of Health, 666 Elm St., Buffalo, N. Y. 14203

Description

<jats:title>Abstract</jats:title> <jats:p>The specific gravity (relative density) of human whole blood and plasma from 25 healthy volunteers was determined gravimetrically. For whole blood it was found to be 1.0621 (95% confidence interval: 1.0652-1.0590) at 4 °C and 1.0506 (95% confidence interval: 1.0537-1.0475) at 37 °C. Plasma specific gravity was 1.0310 (95% confidence interval: 1.0324-1.0296) at 4 °C and 1.0205 (95% confidence interval: 1.0216-1.0193) at 37 °C. All of these values are referred to the density of water at 4 °C. We show the relationship between these values and those given in the literature for measurements at 25 °C. There was a small increase in whole blood specific gravity with increasing hematocrit, but it was not statistically significant over the 40-56 hematocrit range studied.</jats:p>

Journal

  • Clinical Chemistry

    Clinical Chemistry 20 (5), 615-616, 1974-05-01

    Oxford University Press (OUP)

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