A physician gives the following order: "Infuse LR, 500 mL over 2 hours."
At what rate should the nurse set the IV pump to deliver this infusion (mL/hr)?

100 mL/hr

250 mL/hr

500 mL/hr

1000 mL/hr

Answer and Explanation

The Correct Answer is B

To calculate the infusion rate in mL/hr, we need to divide the total volume to be infused by the time for infusion and convert the units appropriately.

First, we need to convert the time of infusion from hours to minutes, since most IV pumps use minutes as the time unit.

2 hours x 60 minutes/hour = 120 minutes Next, we can calculate the infusion rate:

500 mL ÷ 120 minutes = 4.17 mL/minute

To convert mL/minute to mL/hour, we multiply by 60:

4.17 mL/minute x 60 minutes/hour = 250 mL/hour

Therefore, the correct answer is B. 250 mL/hr. The nurse should set the IV pump to deliver the LR infusion at a rate of 250 mL/hr to infuse 500 mL over 2 hours.

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Correct Answer is C

Explanation

To calculate the dose that the child receives, we need to first convert the volume of the suspension from teaspoons to milliliters. One teaspoon is equal to 5 milliliters, so 2 teaspoons is equal to 10 milliliters. Then, we can use the concentration of the suspension to find the amount of cefuroxime in 10 milliliters. The concentration is 25 mg in 2 mL, or 12.5 mg in 1 mL. Therefore, the amount of cefuroxime in 10 mL is:

10 mL × 12.5 mg/mL = 125 mg

Therefore, the child receives 125 mg of cefuroxime once a day orally.

A. 56 mL B. 64 mL C. 65 mL D. 88 mL

Correct Answer is B

Explanation

Step 1: Determine the dosage ratio. 60 mg (ordered) ÷ 70 mg (available) = 0.8571 (rounded to 4 decimal places)

Step 2: Calculate the volume to administer. 0.8571 × 75 mL (available) = 64.2857 mL (rounded to 4 decimal places)

Step 3: Round to the nearest whole number. 64.2857 mL rounds to 64 mL

So, the nurse should administer 64 mL to the patient.

The correct answer is B. 64 mL.

The correct answer is B. 64 mL.

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A physician gives the following order: "Infuse LR, 500 mL over 2 hours." At what rate should the nurse set the IV pump to deliver this infusion (mL/hr)?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Cefuroxime is available as a suspension of 25 mg in 2 mL. A mother informs a nurse that she gives her child 2 tsp of the suspension once a day orally. What is the dose that the child receives?

Correct Answer is C

Explanation

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Correct Answer is B

Explanation

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A physician gives the following order: "Infuse LR, 500 mL over 2 hours."
At what rate should the nurse set the IV pump to deliver this infusion (mL/hr)?