A client is concerned about needing a blood transfusion after delivery due to the blood loss in delivery. The nurse explains that blood volume increases during pregnancy. Which of the following is the correct percentage of increased blood volume during pregnancy that the nurse should explain to the client?
10% - 15%.
20% - 30%.
40% - 50%.
65% - 75%. .
The Correct Answer is C
Choice A rationale
A 10% to 15% increase in blood volume during pregnancy is too low compared to the average physiological changes that occur.
Choice B rationale
A 20% to 30% increase in blood volume is also below the expected range of increase during pregnancy.
Choice C rationale
Blood volume typically increases by 40% to 50% during pregnancy. This significant increase supports the demands of the growing fetus and placenta and prepares the mother's body for the blood loss that occurs during delivery.
Choice D rationale
A 65% to 75% increase is an overestimate. Such an extensive increase would be abnormal and is not typical in healthy pregnancies.
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Correct Answer is C
Explanation
Choice A rationale
The placenta does not provide thermoregulation; that function is managed by maternal thermoregulation and the amniotic fluid which insulates the fetus.
Choice B rationale
Amniotic fluid cushions the fetus from maternal movements, not the placenta. The placenta's role is more focused on nutrient and waste exchange.
Choice C rationale
The placenta facilitates metabolic functions and gas exchange, supplying oxygen and nutrients to the fetus while removing carbon dioxide and waste products, ensuring fetal development.
Choice D rationale
The placenta doesn't provide a sterile environment. This is accomplished by the amniotic sac and amniotic fluid. The placenta connects the fetus to maternal blood supply, ensuring necessary exchanges for fetal growth.
Correct Answer is C
Explanation
Choice A rationale
Increasing the rate of infusion of IV oxytocin in the presence of abnormal fetal heart rate decelerations is contraindicated. It may exacerbate uterine hyperstimulation, further compromising fetal oxygenation.
Choice B rationale
Decreasing the rate of infusion of the maintenance IV solution will not address the issue of uterine hyperstimulation or abnormal fetal heart rate decelerations. The focus should be on managing oxytocin administration.
Choice C rationale
Discontinuing the infusion of IV oxytocin is appropriate due to uterine tachysystole and associated fetal heart rate decelerations. This helps reduce uterine contractions and allows for fetal recovery, improving oxygenation.
Choice D rationale
Slowing the client's rate of breathing is not related to managing uterine contractions or fetal heart rate decelerations. The intervention should directly address the cause of the decelerations, which is oxytocin-induced hyperstimulation. .