A nurse is reviewing the medication history of a client who is in pre-term labor and has a history of peptic ulcer disease.

The nurse should recognize that which of the following medications is contraindicated for this client?

According to the search results, magnesium sulfate can have a negative effect on the fetal heart rate (FHR) by lowering the baseline, decreasing the variability, and reducing the reactivity or acceleration pattern.Absent variability means that there is no fluctuation in the FHR and it indicates fetal hypoxia or acidosis.

This is a potential adverse effect of magnesium sulfate on the fetus and requires immediate intervention.

Choice A.Accelerations is wrong because accelerations are transient increases in the FHR that indicate fetal well-being.They are not affected by magnesium sulfate.

Choice B.Early decelerations is wrong because early decelerations are decreases in the FHR that occur with uterine contractions and are caused by fetal head compression.They are benign and do not indicate fetal distress.They are not associated with magnesium sulfate.

Choice C.Variable decelerations is wrong because variable decelerations are abrupt decreases in the FHR that vary in shape, duration, and timing and are caused by umbilical cord compression.

They may or may not indicate fetal compromise.

Assess fetal heart rate and activity.

The nurse should identify that a client who reports a sudden gush of fluid from her vagina is at risk forpremature rupture of membranes (PROM), which can lead toinfection,cord prolapse, andfetal distress.Therefore, the priority action is to assess the fetal heart rate and activity to monitor for signs of hypoxia or distress.

Choice B is wrong because performing a nitrazine test on the fluid is not the first action.A nitrazine test can confirm the presence of amniotic fluid by detecting its alkaline pH, but it is not as urgent as assessing the fetal well-being.

Choice C is wrong because administering oxytocin (Pitocin) IV infusion is contraindicated in this situation.Oxytocin is used to induce or augment labor, but it can causeuterine hyperstimulation,fetal distress, andplacental abruptionif given to a client who has PROM.

Choice D is wrong because placing the client in Trendelenburg position is not recommended for a client who has PROM.Trendelenburg position can increase the risk ofcord prolapseandaspirationin this situation.