A patient is admitted to the Labor & Delivery unit at 39 weeks.

She is 5/60/-2. After several hours she is at 5/70/-2. What can be given to help augment her labor?

Terbutaline.

Betamethasone.

Pitocin.

Magnesium Sulfate.

Answer and Explanation

The Correct Answer is C

Choice A rationale
Terbutaline is a beta-agonist used to relax uterine muscles and delay preterm labor, not to augment labor in term pregnancies. It is not indicated for labor augmentation.
Choice B rationale
Betamethasone is a corticosteroid given to enhance fetal lung maturity in preterm pregnancies. It is not used to augment labor in term pregnancies, as it does not stimulate uterine contractions.
Choice C rationale
Pitocin (oxytocin) is a synthetic form of the natural hormone oxytocin. It stimulates uterine contractions and is commonly used to induce or augment labor in term pregnancies.
Choice D rationale
Magnesium sulfate is used primarily to prevent seizures in women with preeclampsia and to provide neuroprotection to preterm infants. It does not help augment labor contractions.

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Correct Answer is A

Explanation

Choice A rationale
Fetal sleep cycles cause temporary decreased variability in FHR, typically lasting 20 minutes or less. FHR baseline remains normal. Normal FHR variability is 6-25 bpm.
Choice B rationale
Head compression during contractions leads to early decelerations in FHR, not decreased variability. Early decelerations are a normal response to pressure on the fetal head.
Choice C rationale
Fetal hypoxemia causes decreased variability but usually persists for longer than 20 minutes. It indicates compromised oxygen supply, requiring immediate intervention.
Choice D rationale
Umbilical cord compression leads to variable decelerations in FHR rather than decreased variability. These decelerations vary in onset, duration, and intensity.

A. Is not significantly affected. B. Increases as blood pressure decreases. C. Continues except when placental functions are occluded. D. Diminishes as the spiral arteries are compressed.

Correct Answer is D

Explanation

Choice A rationale
The maternal-fetal exchange of oxygen and waste products is affected by uterine contractions, as these compress the placental blood vessels, temporarily reducing blood flow.
Choice B rationale
Blood pressure variations during labor can influence perfusion but do not increase maternal-fetal exchange as uterine contractions primarily cause transient vascular compression.
Choice C rationale
Maternal-fetal exchange continues during contractions except when the uterine pressure is high enough to occlude placental blood flow, temporarily halting the exchange.
Choice D rationale
Uterine contractions compress the spiral arteries, reducing blood flow through the placenta, thereby diminishing maternal-fetal exchange of oxygen and waste products during contractions.

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A patient is admitted to the Labor & Delivery unit at 39 weeks. She is 5/60/-2. After several hours she is at 5/70/-2. What can be given to help augment her labor?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The most common cause of decreased variability in the FHR that lasts 20 minutes or less is:

Correct Answer is A

Explanation

The maternity nurse understands that as the uterus contracts during labor, maternal-fetal exchange of oxygen and waste products:

Correct Answer is D

Explanation

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A patient is admitted to the Labor & Delivery unit at 39 weeks.

She is 5/60/-2. After several hours she is at 5/70/-2. What can be given to help augment her labor?