The nurse is assisting the primary care provider (PCP) with the third stage of a vaginal delivery. The patient is multiparous, experienced a precipitous birth, and has a history of hypertension.
Which medical prescription does the nurse anticipate for this patient?
Methylergonovine (Methergine).
Magnesium sulfate.
Carboprost-tromethamine (Hemabate).
Fresh frozen plasma (FFP).
The Correct Answer is A
Choice A rationale
Methylergonovine (Methergine) is used to manage postpartum hemorrhage by stimulating uterine contractions. It is especially useful in cases like this where rapid uterine tone is needed.
Choice B rationale
Magnesium sulfate is used to prevent seizures in preeclamptic patients, not to manage postpartum hemorrhage. This choice is incorrect in this context.
Choice C rationale
Carboprost-tromethamine (Hemabate) is also used for treating postpartum hemorrhage but is typically a secondary option to methylergonovine and may have more side effects.
Choice D rationale
Fresh frozen plasma (FFP) is used to replace clotting factors in cases of coagulopathy, not as a primary intervention for postpartum hemorrhage in this patient.
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Correct Answer is B
Explanation
Choice A rationale
Contraction duration less than 40 seconds doesn't define tachysystole. Tachysystole focuses on frequency, not duration, of contractions over a specific time frame.
Choice B rationale
Contraction frequency of more than 5 in 10 minutes defines tachysystole. This frequency indicates excessive uterine activity, requiring intervention to prevent fetal distress.
Choice C rationale
Contraction intensity less than 80 mm Hg does not define tachysystole. Intensity relates to contraction strength, but tachysystole is about frequency exceeding the normal range.
Choice D rationale
Resting tone less than 18 mm Hg isn't part of tachysystole's definition. Tachysystole pertains to contraction frequency, not resting tone, which measures uterine relaxation between contractions.
Correct Answer is C
Explanation
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.