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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
Stimulate the infant to cry. While stimulating the infant to cry is a common practice to assess the newborn's respiratory function, it is not the first action the nurse should perform in this situation. The newborn may cry spontaneously or may require other interventions, such as clearing the respiratory tract, before crying.
Choice B rationale:
Clear the respiratory tract. Clearing the respiratory tract is the priority action in this scenario. It ensures that the airway is open and allows the infant to breathe effectively. This is crucial because newborns are at higher risk of respiratory distress after birth, and prompt action can prevent complications.
Choice C rationale:
Dry the infant off and cover the head. Drying the infant off and covering the head are important steps to prevent heat loss and maintain the newborn's body temperature. However, these actions can be delayed briefly until the respiratory tract is cleared, as the immediate focus should be on ensuring the infant's ability to breathe.
Choice D rationale:
Clamp the umbilical cord. Clamping the umbilical cord is a standard procedure after birth to prevent bleeding and infection. However, it is not the priority in this situation. The first step should be to ensure the newborn's airway is clear and they can breathe adequately.
Correct Answer is C
Explanation
Choice A rationale:
A fetal heart rate of 100/min for a 10-minute period is considered within the normal range. The normal fetal heart rate can range from 110 to 160 beats per minute, and a rate of 100 is not concerning.
Choice B rationale:
The resting period of a contraction refers to the time between contractions when the uterus is relaxed. A resting period of 35 seconds is also considered normal. In labor, the resting period between contractions allows the placenta to receive oxygen and nutrients, and 35 seconds is a rationaleable duration.
Choice C rationale:
A contraction lasting 85 seconds is abnormal and should be reported to the provider. Normally, contractions last around 60-90 seconds, but an 85-second contraction may indicate uterine hyperactivity or other issues that could potentially affect the well-being of both the mother and the baby.
Choice D rationale:
Having four contractions in a 10-minute period is considered normal during labor. In fact, an average pattern includes 3-5 contractions within a 10-minute window, so this finding is not a cause for concern.
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