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  • Title: Effect of maternal intravenous infusions on fetal extracellular fluid composition in pregnant ewes.
    Author: Golden SM, O'Brien WF, Heroman WM, Nalle L, Cefalo RC.
    Journal: Am J Perinatol; 1985 Jul; 2(3):189-93. PubMed ID: 4015765.
    Abstract:
    Infusion of intravenous solutions to women in labor is common clinical practice. Since these infusions may change the volume and electrolyte balance between the mother and fetus, we investigated the influence of acute maternal volume expansion upon fetal and maternal fluid and electrolyte equilibrium in the chronically catheterized fetal lamb. Paired measurements of maternal and fetal plasma sodium and potassium concentrations, osmolality, and colloid osmotic pressure (COP), plus measurements in the fetal-placental plasma volume were obtained following rapid maternal infusions with saline, dextrose, and dextran solutions. Maternal infusions resulted in changes in fetal electrolyte concentrations as well as alterations in transplacental COP differences. Despite these changes, however, no changes in fetal plasma volume were noted.
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