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  • Title: The concentration of free calcium ions and total calcium in pregnancies at term.
    Author: Wandrup J, Kjer JJ, Thode J, Siggaard-Andersen O.
    Journal: Scand J Clin Lab Invest; 1982 May; 42(3):273-7. PubMed ID: 7134811.
    Abstract:
    The concentration of free calcium ions (cCa2+), total calcium (ctCa) and pH was measured in 46 normal pregnancies at term. Measured with a combined Ca2+-pH electrode system in whole blood, maternal plasma cCa2+ was 1.18 +/- 0.03 mmol/l, and the corresponding plasma pH was 7.37 +/- 0.05 (mean +/- SD). In the cord vein, plasma cCa2+ was 1.44 +/- 0.07 mmol/l and pH 7.37 +/- 0.05. In the cord artery, plasma cCa2+ was 1.47 +/- 0.07 mmol/l and pH 7.29 +/- 0.07.
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