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 B
Explanation
Choice A rationale
Labor dystocia involves prolonged labor. Her fast delivery history suggests the opposite, indicating rapid labor progress.
Choice B rationale
Rapid labor progression, frequent contractions, and previous short labors suggest she is at risk for precipitous labor, requiring immediate preparation for delivery.
Choice C rationale
Cephalopelvic disproportion indicates size mismatch between baby and pelvis, not rapid labor. Her history of quick deliveries does not align with this condition.
Choice D rationale
False labor typically involves irregular, less intense contractions. Her regular, intense contractions and labor history suggest active labor, not false labor.
Correct Answer is D
Explanation
Choice A rationale
A low transverse uterine scar is considered the safest type of uterine incision for a VBAC because it is less likely to rupture compared to other types of scars. Therefore, a low transverse uterine scar would not disqualify the patient for VBAC.
Choice B rationale
Patient asking multiple questions does not disqualify her for VBAC. Patient education and ensuring the patient’s understanding and agreement with the procedure is an essential part of the process.
Choice C rationale
Induction of labor in the first pregnancy does not automatically disqualify a patient from attempting VBAC. The success of VBAC depends on multiple factors including the reason for the initial cesarean section.
Choice D rationale
A cesarean due to pelvic abnormalities would disqualify the patient for VBAC because the underlying pelvic condition that necessitated the initial cesarean section is likely still present and would increase the risk of complications during vaginal birth.