A physician orders magnesium sulfate, 6 grams loading dose to be administered over 30 minutes. There are 40 grams of magnesium sulfate in the IV bag. What is the rate per hour to administer the loading dose?

75 mL/hr

150 mL/hr

300 mL/hr

450 mL/hr

Answer and Explanation

The Correct Answer is C

To calculate the rate per hour, divide the amount of magnesium sulfate to be administered by the concentration of magnesium sulfate in the IV bag:

6 grams ÷ 40 grams = 0.15

Then, multiply the result by the volume of the IV bag, which is usually 1000 mL: 0.15 x 1000 mL = 150 mL

This is the amount of fluid that contains 6 grams of magnesium sulfate. To administer this amount over 30 minutes, multiply by 2 to get the rate per hour:

150 mL x 2 = 300 mL/hr.

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Correct Answer is D

Explanation

To calculate the time it will take to finish the infusion, we can use the formula:

Time = Volume / Rate

Plugging in the given values, we get: Time = 1.5 L / 75 mL/hr

Converting 1.5 L to mL, we get:

Time = 1500 mL / 75 mL/hr Simplifying, we get:

Time = 20 hours

Therefore, it will take 20 hours to finish the infusion at the current rate.

A. 100 mL/hr B. 150 mL/hr C. 200 mL/hr D. 400 mL/hr

Correct Answer is C

Explanation

The patient is ordered to receive 0.15 mg/kg of Zofran over 15 minutes. The patient weighs 176 lb, which is equivalent to 80 kg. To calculate the total amount of Zofran the patient should receive, multiply the weight by the dosage:

80 kg x 0.15 mg/kg = 12 mg

The Zofran arrives from the pharmacy mixed in 50 mL of normal saline, which means there is 12 mg of Zofran in 50 mL of solution. To calculate how many milliliters per hour the nurse should set the IV pump, we can use the following formula:

50 mL / 0.25 hour = X mL per hour X = 200 mL per hour

Therefore, the nurse should set the IV pump to deliver 200 mL of Zofran per hour to the patient.

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A physician orders magnesium sulfate, 6 grams loading dose to be administered over 30 minutes. There are 40 grams of magnesium sulfate in the IV bag. What is the rate per hour to administer the loading dose?

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Naxlex Comprehensive Predictor Exams

A client is receiving intravenous infusion of 1.5 L saline solution at a rate of 75 mL/hr. How many hours will it take to finish the infusion at the current rate?

Correct Answer is D

Explanation

A nurse will administer Zofran (ondansetron) 0.15 mg/kg over 15 minutes. The patient weighs 176 lb. The nurse receives the medication from the pharmacy mixed in 50 mL normal saline... How should the nurse set the IV pump to deliver the correct dose?

Correct Answer is C

Explanation

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