A patient is in preterm labor at 30 weeks gestation.
Her OB orders antenatal steroids.
The order is for the nurse to administer betamethasone IM and to repeat the dose after 2 hours.
Betamethasone is available as 4mg/mL in 10 mL vials.
How many mL will the nurse draw up in the syringe for each dose?
0.5 mL
1 mL
1.5 mL
3 mL
The Correct Answer is D
Step 1 is to calculate the volume of betamethasone to be drawn up for each dose. The order is to administer betamethasone IM and to repeat the dose after 2 hours. Betamethasone is available as 4mg/mL. Therefore, to administer a dose of 12mg, the nurse would need to draw up 12mg ÷ 4mg/mL = 3mL for each dose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
The correct answer is Choice B.
Choice A rationale
Variable decelerations are not related to fetal head compression. Fetal head compression typically results in early decelerations, not variable ones.
Choice B rationale
Variable decelerations are indeed due to umbilical cord compression. They are quick decreases in fetal heart rate that vary with uterine contractions. This can be a sign that the baby’s blood flow is reduced if variable decelerations happen over and over.
Choice C rationale
Uteroplacental insufficiency typically results in late decelerations, not variable ones. Late decelerations are a sign of fetal hypoxia and are associated with uteroplacental insufficiency.
Choice D rationale
While certain medications can affect the fetal heart rate, variable decelerations are not typically a result of the administration of narcotic analgesics.
Correct Answer is A
Explanation
Choice A rationale
The maternal serum alpha-fetoprotein (MSAFP) test is a screening test that measures the level of alpha-fetoprotein in the mother’s blood during pregnancy. It is used to assess the likelihood of certain birth defects, including neural tube defects such as spina bifida.
Choice B rationale
The MSAFP test does not assess fetal lung maturity. Other tests, such as amniocentesis, can be used to assess this.
Choice C rationale
The MSAFP test does not identify Rh incompatibility between the mother and fetus. Rh incompatibility is typically determined through blood typing and antibody screening.
Choice D rationale
While the MSAFP test can provide valuable information about the health of the fetus, it does not assess various markers of fetal well-being. It is specifically used to screen for certain birth defects.
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