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The healthcare provider prescribes cefazolin 800 mg IM every 6 hours. The available vial is labeled, "Cefazolin 1 gram," and the instructions for reconstitution state, "For IM use, add 2.5 mL sterile water for injection to provide a total volume of 3.0 mL How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Answer and Explanation

The Correct Answer is ["2.4"]

Here's how to calculate the volume (mL) the nurse should administer for cefazolin:

1. We know the following:

Prescribed dose: 800 mg cefazolin IM every 6 hours (given)

Vial content: 1 gram cefazolin (given)

However, we need to consider the reconstitution process for accurate dosage calculation.

Reconstitution information:

For IM use, add 2.5 mL sterile water for injection.

This dilution creates a total volume of 3.0 mL.

3. We need to find the concentration of cefazolin in the reconstituted solution (mg/mL).

Concentration (mg/mL) = Total drug amount (mg) / Total volume (mL) after reconstitution

Concentration (mg/mL) = 1 gram (which is 1000 mg) / 3.0 mL

Concentration (mg/mL) = 333.33 mg/mL (round to nearest tenth)

4. Now, we can find the volume to administer for the prescribed dose (800 mg) considering the concentration (333.33 mg/mL) in the reconstituted solution.

Volume to administer (mL): Dose (mg) / Concentration (mg/mL)

Volume to administer (mL): 800 mg / 333.33 mg/mL

Volume to administer (mL): 2.40 mL (round to nearest tenth)

Therefore, the nurse should administer approximately 2.4 mL of the reconstituted cefazolin solution intramuscularly.

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Free Nursing Study Resources

Correct Answer is ["0.4"]

Explanation

here's how to calculate the volume (mL) of ketorolac the nurse should administer:

1. Dose of ketorolac to administer:

Dose = 12 mg (given)

2. Concentration of ketorolac in the vial:

Concentration = 30 mg/mL (given)

3. We need to find the volume (mL) containing the prescribed dose (12 mg) considering the concentration (30 mg/mL) in the vial.

Volume to administer (mL): Dose (mg) / Concentration (mg/mL)

Volume to administer (mL): 12 mg / 30 mg/mL

Volume to administer (mL) = 0.4 mL (round to nearest tenth)

Therefore, the nurse should administer approximately 0.4 mL of ketorolac intravenously.

Correct Answer is ["0.8"]

Explanation

Here's how to calculate the volume (mL) of epoetin alfa the nurse should administer:

1. We know the following:

Prescribed dose: 8,200 units epoetin alfa (given)

Vial concentration: 10,000 units/mL (given from the label)

2. We need to find the volume (mL) to administer for the prescribed dose (8,200 units) considering the concentration (10,000 units/mL).

Volume to administer (mL) = Dose (units) / Concentration (units/mL)

Volume to administer (mL) = 8,200 units / 10,000 units/mL

Volume to administer (mL) = 0.82 mL (round to nearest tenth)

Therefore, the nurse should administer 0.8 mL of epoetin alfa subcutaneously.

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Naxlex Comprehensive Predictor Exams

The nurse is preparing a dose of ketorolac 12 mg IV using a 1 mL vial containing 30 mg/mL. How many mL should the nurse administer? (Enter numerical value only.)

Correct Answer is ["0.4"]

Explanation

Correct Answer is ["0.8"]

Explanation

A child who weighs 30 kg is experiencing a grand mal seizure. The healthcare provider prescribes diazepam 0.3 mg/kg/dose IV STAT. The medication is available in 5 mg/mL vials. How many mL should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth).

A client receives a prescription for IV ciprofloxacin 400 mg every 12 hours, which is to be infused over an hour. The IV bag contains ciprofloxacin 400 mg in dextrose 5% in water (DSW) 200 mL. How many mL/hr should the nurse program the infusion pump to deliver? (Enter numerical value only.)

The healthcare provider prescribes 0.075 mg of levothyroxine PO daily. The medication is labeled, "50 mcg tablets." How many tablets should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

The healthcare provider (HCP) prescribes lidocaine 4 mg/minute IV for a client experiencing premature ventricular contractions. The IV bag contains "Lidocaine 1 gram in dextrose 5% in water 500 mL. How many mL/hr should the nurse program the infusion pump to deliver? (Enter numerical value only.)

A premature infant with a birth weight of 1,200 grams is receiving beractant 120 mg intratracheal every 6 hours. Single use vials of beractant are labeled, "100 mg/4 mL." How many mL should the nurse administer? (Enter the numerical value only. If rounding is required, round to the nearest tenth.)