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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 C

Explanation

The patient is ordered to receive 5 mg of Lopressor over 60 seconds, which is equivalent to 1 minute. The concentration of Lopressor is 1 mg/1 mL, which means there is 1 mg of Lopressor in 1 mL of solution. To calculate how many milliliters per minute the nurse should administer, we can use the following formula:

5 mg / 1 mg per 1 mL = X mL X = 5 mL per minute.

Correct Answer is B

Explanation

We can use the formula for calculating infusion time:. Infusion time = Total volume / Infusion rate.

First, we need to convert the volume of the fluid from liters to milliliters:.

0.75 L = 750 mL.

Next, we can plug in the values we have:. Infusion time = 750 mL / 120 mL/hr.

Infusion time = 6.25 hours.

Since the infusion was started at 9:00 a.m., we can add 6.25 hours to determine when the infusion will be completed:.

9:00 a.m. + 6.25 hours = 3:15 p.m..

Therefore, the infusion will be completed at 3:15 p.m.

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