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
Decreased pain level can be an effect of addressing the cause of pain, but it doesn't indicate improved uterine tone or resolution of atony.
Choice B rationale
Stable blood pressure is important, but it is not the direct outcome of improved uterine tone or the resolution of uterine atony.
Choice C rationale
A firm fundus at or below the umbilicus indicates successful contraction of the uterus, resolving uterine atony and reducing bleeding.
Choice D rationale
Reduced lochial flow can indicate decreased bleeding, but it does not directly indicate improved uterine tone or resolution of uterine atony.
Correct Answer is ["A","B","C","D","E"]
Explanation
Choice A rationale
Hypertensive disorders, such as preeclampsia, increase the risk of placental abruption. They can cause changes in the blood vessels of the placenta, reducing blood flow and increasing the likelihood of separation.
Choice B rationale
Uterine fibroids, which are noncancerous growths in the uterus, can interfere with the proper attachment of the placenta, raising the risk of placental abruption.
Choice C rationale
Cigarette smoking contributes to placental abruption by reducing oxygen supply to the placenta, causing placental insufficiency and increasing the risk of premature separation.
Choice D rationale
Abdominal trauma, such as from a fall or car accident, can cause mechanical disruption of the placenta, leading to abruption.
Choice E rationale
Methamphetamine use can cause vasoconstriction and hypertension, which compromise placental blood flow and increase the risk of abruption.