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A patient is to receive magnesium sulfate 2 grams per hour at 50 mL/hour rate of infusion.
How much magnesium sulfate must be added to 1000 mL normal saline to provide the ordered infusion?

A.

10g

B.

20 g

C.

30 g

D.

40 g

Answer and Explanation

The Correct Answer is D

To calculate the amount of magnesium sulfate to be added to the normal saline, we can use the formula:

Concentration = Dose / Volume Plugging in the given values, we get:

Concentration = 2 g / 50 mL Simplifying, we get:

Concentration = 0.04 g/mL

To find the amount of magnesium sulfate needed for 1000 mL of normal saline, we can multiply the concentration by the volume:

Amount = Concentration × Volume Amount = 0.04 g/mL × 1000 mL Amount = 40 g

Therefore, 40 g of magnesium sulfate must be added to 1000 mL of normal saline to provide the ordered infusion.


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Related Questions

Correct Answer is B

Explanation

We can use proportion to calculate the volume of Primaxin to administer:. 275 mg is to X mL as 500 mg is to 2 mL.

275/X = 500/2.

Cross-multiplying, we get:. 500X = 275 x 2.

X = (275 x 2)/500. X = 1.1 mL.

Therefore, the nurse should administer 1.1 mL of Primaxin to the patient, rounded to the nearest tenth.

Correct Answer is D

Explanation

First, we need to calculate the total dose of esmolol required per minute: Total dose = Weight x Dose x 60 minutes

Total dose = 65 kg x 200 mcg/kg/min x 60 minutes Total dose = 780,000 mcg/min

Next, we need to convert the dose to milligrams (mg):

780,000 mcg/min = 780 mg/min

The concentration of the esmolol solution is 2,500 mg in 250 mL or 10 mg/mL. To deliver 780 mg/min at a concentration of 10 mg/mL, we need to infuse: Infusion rate = Total dose / Concentration

Infusion rate = 780 mg/min / 10 mg/mL Infusion rate = 78 mL/min

Rounding to the nearest whole number, the answer is D. 78 mL/hr.

Therefore, the nurse should calculate an infusion rate of 78 mL/hr to deliver the required dose of esmolol to the patient.

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