A nurse is preparing to administer betamethasone 12mg IM to a client at 32 weeks gestation at risk for preterm delivery.
Betamethasone is available as 6mg/ml. How many ml will the nurse prepare for injection? (Use a leading zero, if it applies. Do not use a trailing zero)
Do not use a trailing zero)
Step 2 is: 12 รท 6 = 2 ml. Answer: 2 ml
The Correct Answer is A
Step 1 is: 12 mg ÷ 6 mg/ml.
Step 2 is: 12 ÷ 6 = 2 ml. Answer: 2 ml
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Correct Answer is A
Explanation
Choice A rationale
Betamethasone is a corticosteroid that accelerates fetal lung maturity by increasing the production of surfactant, which reduces respiratory distress syndrome in preterm infants.
Choice B rationale
While betamethasone can cause transient increases in fetal heart rate, its primary purpose is not to increase fetal heart rate. Its role is in enhancing lung maturity.
Choice C rationale
Betamethasone does not directly increase amniotic fluid levels. Its main function is in the maturation of fetal lungs.
Choice D rationale
Betamethasone is not used to stop preterm labor contractions. It is used to accelerate fetal lung development in preterm labor cases.
Correct Answer is B
Explanation
Choice A rationale
Uteroplacental insufficiency typically results in late decelerations, not a sudden drop in fetal heart rate, which is more commonly caused by umbilical cord compression.
Choice B rationale
Umbilical cord compression can cause variable decelerations, which are characterized by a sudden drop in fetal heart rate. This occurs due to the umbilical cord being compressed,
leading to decreased blood flow and oxygen to the fetus.
Choice C rationale
Maternal bradycardia refers to a slow maternal heart rate and does not directly cause changes in the fetal heart rate pattern.
Choice D rationale
Fetal head compression typically causes early decelerations, which are gradual decreases in fetal heart rate that occur with contractions and are usually benign.