A nurse is reviewing the laboratory results of a client with severe pre-eclampsia who is receiving magnesium sulfate.
Which finding would indicate a therapeutic level of magnesium sulfate?
Serum magnesium level of 4.5 mEq/L
Serum calcium level of 8.5 mg/dL
Serum creatinine level of 1.2 mg/dL
Serum potassium level of 3.5 mEq/L
The Correct Answer is A
This indicates a therapeutic level of magnesium sulfate for a client with severe pre-eclampsia who is receiving magnesium sulfate. According to some sources, the effective therapeutic serum magnesium level is 1.8–3.0 mmol/L, which corresponds to 4.2–7 mg/dL or 3.5–7 mEq/L.

Choice B is wrong because serum calcium level of 8.5 mg/dL is within the normal range and does not indicate the effect of magnesium sulfate.
Choice C is wrong because serum creatinine level of 1.2 mg/dL is within the normal range and does not indicate the effect of magnesium sulfate.
Choice D is wrong because serum potassium level of 3.5 mEq/L is at the lower end of the normal range and does not indicate the effect of magnesium sulfate.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["C","D"]
Explanation
The correct answer is choice C and D.Epigastric pain and decreased fetal movement are signs of severe pre-eclampsia that indicate damage to the liver and placenta respectively.These symptoms should be reported to the health care provider immediately as they may lead to serious complications such as eclampsia, HELLP syndrome, placental abruption or fetal growth restriction.
Choice A is wrong because sudden weight gain is a common symptom of mild pre-eclampsia that does not necessarily require immediate attention.However, it should be monitored regularly along with blood pressure and urine protein levels.
Choice B is wrong because swelling of the face and hands is also a common symptom of mild pre-eclampsia that does not indicate severe organ damage.It may be caused by fluid retention or edema.
Choice E is wrong because vaginal bleeding is not a typical symptom of pre-eclampsia.It may be a sign of other pregnancy complications such as placenta previa, placental abruption or cervical infection.
Correct Answer is C
Explanation
The client should not resume normal activities as soon as she gets home because she is still at risk for complications from preeclampsia.She should rest as directed by her healthcare provider and avoid strenuous activities that may increase her blood pressure.
Choice A is wrong because monitoring blood pressure at home is a recommended practice for clients who had preeclampsia.It can help detect any signs of worsening hypertension or organ damage.
Choice B is wrong because reporting any headache, vision changes, or abdominal pain to the doctor is a crucial step to prevent serious complications from preeclampsia.These symptoms may indicate damage to the brain, eyes, or liver and require immediate medical attention.
Choice D is wrong because continuing to take prenatal vitamins and iron supplements is beneficial for the client’s recovery and health.Prenatal vitamins can provide essential nutrients that may be lacking in the diet, and iron supplements can prevent or treat anemia that may result from blood loss during delivery.
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