A nurse is assessing a client with severe pre-eclampsia who is receiving magnesium sulfate infusion.
Which finding should alert the nurse to suspect magnesium toxicity?
Respiratory rate of 10 breaths/min
Deep tendon reflexes of 2+
Urine output of 40 mL/hour
Serum magnesium level of 6 mq/L
The Correct Answer is A
Respiratory rate of 10 breaths/min.
This is a sign of magnesium toxicity, which can occur when a client receives magnesium sulfate infusion for severe pre-eclampsia. Magnesium toxicity can cause muscle weakness, difficulty breathing, irregular heartbeats, and cardiac arrest.
Choice B is wrong because deep tendon reflexes of 2+ are normal and do not indicate magnesium toxicity.
Choice C is wrong because urine output of 40 mL/hour is adequate and does not indicate magnesium toxicity.
The minimum urine output for an adult is 30 mL/hour.
Choice D is wrong because serum magnesium level of 6 mEq/L is within the normal range of 1.7 to 2.3 mEq/L and does not indicate magnesium toxicity. Magnesium levels above 2.6 mEq/L can indicate hypermagnesemia.
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Related Questions
Correct Answer is A
Explanation
Administer calcium gluconate as an antidote if toxicity occurs.Magnesium sulfate is a mineral that reduces seizure risks in women with severe preeclampsia.However, it can also cause side effects and toxicity, such as respiratory depression, muscle weakness, and cardiac arrest.Calcium gluconate is an antidote that can reverse the effects of magnesium sulfate and restore normal neuromuscular function.
Choice B is wrong because magnesium sulfate does not affect blood glucose levels.
There is no need to monitor the client’s blood glucose level every 4 hours.
Choice C is wrong because the infusion should be discontinued if the client’s respiratory rate is below 12/min, not 16/min.
A low respiratory rate indicates respiratory depression, which is a sign of magnesium toxicity.
Choice D is wrong because the infusion rate should not be increased if the client’s urine output is above 30 mL/hr.Urine output should be at least 30 mL/hr while administering magnesium sulfate to prevent accumulation of the drug in the body.
Increasing the infusion rate can increase the risk of toxicity.
Correct Answer is A
Explanation
“You may feel warm and flushed while receiving this medication.” This is a common side effect of magnesium sulfate therapy, which is used to prevent seizures in women with severe pre-eclampsia.Magnesium sulfate can also help prolong a pregnancy for up to two days by relaxing the uterus.
Choice B is wrong because magnesium sulfate can cause fluid retention and swelling, not dehydration.Choice C is wrong because magnesium sulfate can cause drowsiness and lethargy, not insomnia and restlessness.Choice D is wrong because magnesium sulfate can cause decreased blood pressure and heart rate, not inflammation and infection at the infusion site.
Normal ranges for blood pressure are below 140/90 mm Hg, for platelet count are 150,000 to 450,000 per microliter of blood, and for protein in urine are less than 300 milligrams per day.
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