A nurse is assessing a client who has severe preeclampsia and is receiving magnesium sulfate via continuous IV infusion.
Which of the following findings should alert the nurse to suspect magnesium toxicity?
Respiratory rate 10/min
Urine output 40 mL/hr
Patellar reflex 2+
Serum magnesium level 4.5 mEq/L
The Correct Answer is A
Respiratory rate 10/min. This indicates muscle weakness and difficulty breathing, which are symptoms of magnesium toxicity. Magnesium sulfate is a medication that can cause magnesium overdose if given in excess or if the patient has impaired kidney function.
Choice B. Urine output 40 mL/hr is wrong because this is within the normal range for urine output, which is 30 to 50 mL/hr. Urine output may decrease in severe cases of magnesium toxicity due to urine retention.
Choice C. Patellar reflex 2+ is wrong because this is a normal finding for the knee-jerk reflex. A low or absent patellar reflex may indicate magnesium toxicity, as it reflects muscle weakness and nerve dysfunction.
Choice D. Serum magnesium level 4.5 mEq/L is wrong because this is within the normal range for serum magnesium, which is 1.7 to 2.3 mEq/L. Serum magnesium levels above 2.6 mEq/L can indicate hypermagnesemia or magnesium overdose.
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Naxlex Comprehensive Predictor Exams
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Correct Answer is A
Explanation
Respiratory rate of 10 breaths/minute.This indicates that the client is experiencingmagnesium toxicity, which can causemuscle weakness,difficulty breathing, andcardiac arrest.The normal respiratory rate for adults is 12 to 20 breaths/minute.
Choice B is wrong because deep tendon reflexes of 2+ are normal and do not indicate magnesium toxicity.
Choice C is wrong because urinary output of 40 mL/hour is within the normal range of 30 to 50 mL/hour.Magnesium toxicity can cause urine retention, not increased output.
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.Magnesium toxicity occurs when the level is above 2.6 mEq/L.
Correct Answer is A
Explanation
Headache that does not respond to analgesics.This is a possible sign of postpartum pre-eclampsia, a rare condition that occurs when a woman has high blood pressure and excess protein in her urine soon after childbirth.Postpartum pre-eclampsia can cause seizures and other serious complications if not treated.
Choice B is wrong because breast engorgement and tenderness are normal symptoms of breastfeeding and do not indicate postpartum pre-eclampsia.
Choice C is wrong because lochia rubra with small clots is a normal discharge of blood and tissue from the uterus after delivery and does not indicate postpartum pre-eclampsia.
Choice D is wrong because perineal pain and swelling are common after vaginal delivery and do not indicate postpartum pre-eclampsia.
Normal ranges for blood pressure are below 120/80 mm Hg and for protein in urine are below 150 mg/day.
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