How it Works
Try Naxlex NCLEX-RN (Free-Trial)

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.


Get 100+ Naxlex Exit Exams for $79 Try Naxlex NCLEX-RN (14 Day Free-Trial)

Naxlex Comprehensive Predictor Exams

Free Nursing Study Resources

Related Questions

Correct Answer is ["1.3"]

Explanation

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

Client weight conversion:

Client weight: 176 pounds

Since medication dosage is based on weight per kilogram (kg), we need to convert the weight to kg for accurate calculation.

Conversion factor: 1 kg = 2.205 lbs

Client weight (kg) = 176 pounds / 2.205 lbs/kg

Client weight (kg) = 80 kg (round to nearest whole number)

Filgrastim dose per kg:

Dose per kg = 5 mcg/kg (given)

Filgrastim concentration:

The medication vial is labeled 300 mcg/mL. This indicates there are 300 mcg of filgrastim in every 1 mL of solution.

We need to find the volume (mL) containing the prescribed dose (based on weight) of filgrastim (5 mcg/kg) considering the concentration (300 mcg/mL) in the vial.

Total filgrastim dose (mcg): Dose (mcg/kg) x Client weight (kg)

Total filgrastim dose (mcg): 5 mcg/kg * 80 kg

Total filgrastim dose (mcg): 400 mcg

Volume to administer (mL): Total dose (mcg) / Concentration (mcg/mL)

Volume to administer (mL): 400 mcg / 300 mcg/mL

Volume to administer (mL) = 1.33 mL (round to nearest tenth)

Therefore, the nurse should administer approximately 1.3 mL of filgrastim subcutaneously.

Correct Answer is ["59.147"]

Explanation

Here's how to calculate the number of mL the nurse should document:

Client dosage: 2 ounces (given)

Conversion factor: 1 ounce (oz) = 29.5735 mL (conversion factor)

Magnesium hydroxide concentration: 400 mg per 5 mL (from bottle label)

We need to find the equivalent volume in mL of the 2 ounces dosage the client reported.

Steps:

a. Convert ounces to mL:

Client dosage (mL) = Client dosage (oz) x Conversion factor (mL/oz)

Client dosage (mL) = 2 oz * 29.5735 mL/oz

Client dosage (mL) = 59.147 mL (round to nearest hundredth)

Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.

Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today

Register