Increasing the infusion rate of nonadditive intravenous fluids can increase fetal oxygenation primarily by:
a. Maintaining normal maternal temperature.
b. Preventing normal maternal hypoglycemia.
c. Increasing the oxygen-carrying capacity of the maternal blood.
d. Expanding maternal blood volume.
ANS: D
Filling the mother's vascular system makes more blood available to perfuse the placenta and may correct hypotension. Increasing fluid volume may alter the maternal temperature only if she is dehydrated. Most intravenous fluids for laboring women are isotonic and do not provide extra glucose. Oxygen-carrying capacity is increased by adding more red blood cells.
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