A nurse is assisting with the care of a client who has severe preeclampsia and is receiving magnesium sulfate IV at 2 g/hr. Which of the following findings indicates that it is safe for the nurse to continue the infusion?
Respiratory rate of 16/min.
Heart rate of 60/min.
Urine output of 50 mL in 4 hr.
Diminished deep-tendon reflexes.
The Correct Answer is A
The correct answer is choice A: Respiratory rate of 16/min.
Choice A rationale:
A respiratory rate of 16/min is within the normal range for adults, which is typically between 12 to 20 breaths per minute. In the context of severe preeclampsia, maintaining a normal respiratory rate is crucial when administering magnesium sulfate IV, as one of the signs of magnesium toxicity is respiratory depression. Therefore, a respiratory rate of 16/min indicates that the client is not experiencing respiratory depression and it is safe to continue the magnesium sulfate infusion.
Choice B rationale:
A heart rate of 60/min is at the lower end of the normal range, which is 60 to 100 beats per minute for adults. However, bradycardia or a low heart rate can be a sign of magnesium sulfate toxicity, especially if accompanied by other symptoms such as hypotension or altered mental status. Without additional context, a heart rate of 60/min alone does not necessarily indicate it is unsafe to continue the infusion, but it would require further assessment.
Choice C rationale:
A urine output of 50 mL in 4 hours is significantly below the expected minimum of 30 mL/hour for adults. Adequate urine output is an important indicator of kidney function and is essential for the excretion of magnesium. In the case of magnesium sulfate infusion for severe preeclampsia, a low urine output could indicate renal insufficiency and an increased risk of magnesium toxicity. Therefore, a urine output of 50 mL in 4 hours is a contraindication for continuing the infusion without further evaluation.
Choice D rationale:
Diminished deep-tendon reflexes can be a sign of magnesium toxicity. Deep-tendon reflexes are assessed to monitor for signs of magnesium overdose during infusion, as magnesium acts as a central nervous system depressant at high levels. If deep-tendon reflexes are diminished, it may suggest that the serum magnesium levels are too high, and the infusion should be paused or discontinued to prevent further toxicity.
In summary, the only finding that clearly indicates it is safe to continue the magnesium sulfate infusion is a normal respiratory rate, as provided in choice A. The other options either require further assessment or are indicators of potential magnesium toxicity.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
The correct answer is choice d. Place the client in a knee-chest or Trendelenburg position.
Choice A rationale:
Preparing the client for an emergency cesarean birth is important, but it is not the immediate first action. The priority is to relieve pressure on the umbilical cord to prevent fetal hypoxia.
Choice B rationale:
Explaining to the client what is happening is important for communication and reassurance, but it is not the immediate first action. Immediate physical intervention is required to prevent harm to the fetus.
Choice C rationale:
Covering the cord with a sterile, moist saline dressing is a necessary step to prevent the cord from drying out and to reduce infection risk, but it should be done after repositioning the client to relieve pressure on the cord.
Choice D rationale:
Placing the client in a knee-chest or Trendelenburg position helps to relieve pressure on the umbilical cord, which is crucial to maintain fetal oxygenation. This is the immediate first action to take in this emergency situation.
Correct Answer is B
Explanation
Choice A reason:
Initiating epidural anesthesia too soon may delay rupture of fetal membranes. This statement is not accurate. Epidural anesthesia itself does not have a direct impact on the rupture of fetal membranes. The timing of rupturing membranes is determined based on the progress of labor and other clinical indications. There is no causal relationship between epidural anesthesia and the timing of membrane rupture.
Choice B reason:
Initiating epidural anesthesia too soon can prolong labor. This statement is correct. Epidural anesthesia, while providing pain relief during labor, can also cause some degree of motor blockage and decrease the woman's ability to push effectively. This can potentially lead to a lengthening of the labor process. It is generally recommended to wait until a good labor pattern has been established to avoid unnecessary prolongation of labor.
Choice C reason:
Initiating epidural anesthesia too soon can cause fetal depression. This statement is not entirely accurate. Epidural anesthesia can cross the placenta and reach the fetus, but the effect on the baby is usually minimal. However, fetal monitoring is essential during labor to ensure the baby's well-being, regardless of whether epidural anesthesia is used or not.
Choice D reason:
Initiating epidural anesthesia too soon can cause maternal hypertension. This statement is not supported by evidence. Epidural anesthesia does not typically cause maternal hypertension. It can, however, lead to a decrease in blood pressure in some cases, which is why careful monitoring of maternal blood pressure is necessary during and after the administration of epidural anesthesia.
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