50 grams of Magnesium sulfate is added to 1L of Lactated Ringers.
After giving an initial loading dose, the nurse is to infuse a maintenance dose of 2 gm/hr. What rate should the IV pump be set at?
10 mL/hr
20 mL/hr
30 mL/hr
40 mL/hr
The Correct Answer is D
Step 1 is to calculate the total amount of Magnesium sulfate in the solution. This is done by multiplying the amount of Magnesium sulfate per mL (which is 50g/L or 0.05g/mL) by the total volume of the solution (which is 1000mL). So, 0.05g/mL × 1000mL = 50g.
Step 2 is to calculate the rate of the IV pump. The maintenance dose is 2g/hr. So, if there are 50g in 1000mL, then 2g would be in (2g ÷ 50g) × 1000mL = 40mL. Therefore, the IV pump should be set at 40 mL/hr.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
The correct transcription of two tenths of a milligram is 0.2 mg. This format avoids any potential confusion that could lead to a medication error.
Choice B rationale
While 0.20 mg is technically correct, it is not the preferred format. The trailing zero after the decimal point is unnecessary and could potentially lead to confusion.
Choice C rationale
20 mg is not correct. This is 100 times the intended dose of two tenths of a milligram, and could lead to a serious medication error.
Choice D rationale
2 mg is not correct. This is 10 times the intended dose of two tenths of a milligram, and could lead to a medication error.
Correct Answer is B
Explanation
Choice A rationale
Vaginal discharge is common during pregnancy due to the increased production of estrogen and greater blood flow to the pelvic area. It is not typically a sign of preeclampsia.
Choice B rationale
Elevated blood pressure is a primary symptom of preeclampsia. If a pregnant client has high blood pressure, it should indicate to the nurse that the client requires further evaluation for this disorder.
Choice C rationale
Joint pain is not typically a symptom of preeclampsia. It could be related to other conditions or simply a result of the physical changes of pregnancy.
Choice D rationale
Increased urine output is not typically associated with preeclampsia. In fact, decreased urine output could potentially be a sign of kidney problems related to preeclampsia.
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