A client at 28 weeks' gestation with intact membranes is admitted with the following findings: contractions every 5 minutes lasting 60 seconds, 3 cm dilated, 80% effaced.
Which of the following medications will the obstetrician likely order?
Magnesium sulfate.
Morphine sulfate.
Terbutaline.
Betamethasone.
The Correct Answer is C
Choice A rationale
Magnesium sulfate is primarily used for neuroprotection in preterm infants and to prevent seizures in severe preeclampsia, not as a first-line tocolytic for preterm labor.
Choice B rationale
Morphine sulfate is an opioid analgesic used for pain management, not for inhibiting preterm labor contractions.
Choice C rationale
Terbutaline is a beta-agonist used as a tocolytic to relax uterine muscles and delay preterm labor. It helps decrease the intensity and frequency of contractions, making it suitable for managing preterm labor.
Choice D rationale
Betamethasone is a corticosteroid used to accelerate fetal lung maturity in preterm labor, not for direct contraction inhibition.
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Correct Answer is C
Explanation
Choice A rationale
A 15-year-old, G3 P0020, although young, doesn't have an increased risk of uterine rupture related to prior surgical deliveries or other known factors.
Choice B rationale
A 22-year-old, G1 P0000 with eclampsia requires close monitoring for complications related to eclampsia but not specifically for uterine rupture.
Choice C rationale
A 25-year-old, G4 P3003 with a previous cesarean section is at increased risk for uterine rupture due to the scar from the prior surgery which could weaken under the stress of labor.
Choice D rationale
A 32-year-old, G2 P0100's history of a prior fetal demise does not specifically increase the risk of uterine rupture unless accompanied by other risk factors. .
Correct Answer is D
Explanation
Choice A rationale
Reflexes of 3+ indicate hyperreflexia, common in pre-eclampsia, but not necessarily critical. Monitoring is essential but not an emergency.
Choice B rationale
Urinary output of 30 mL/hr is within the acceptable range but requires monitoring for any changes. It's not a critical alert.
Choice C rationale
A respiratory rate of 16 rpm is normal and does not indicate immediate risk requiring physician notification.
Choice D rationale
Serum magnesium level of 10 mg/dL is significantly high, indicating potential toxicity. Immediate physician notification is critical to adjust magnesium sulfate administration.