The nurse is preparing to administer a prescription for cefazolin 600 mg IM every six hours. The available vial is labeled, *Cefazolin 1 gram," and the instructions for reconstitution state, "For IM use add 2 mL sterile water for injection. Total volume reconstitution equals 2.5 mL." When reconstituted, how many milligrams are in each mL of solution? (Enter numeric value only)
The Correct Answer is ["400"]
Given:
Vial strength: Cefazolin 1 gram (1000 mg)
Volume of diluent: 2 mL sterile water
Total volume after reconstitution: 2.5 mL
Step 1: Calculate the concentration of Cefazolin in the reconstituted solution:
Concentration (mg/mL) = Total amount of Cefazolin (mg) / Total volume of solution (mL)
Concentration (mg/mL) = 1000 mg / 2.5 mL
Concentration (mg/mL) = 400 mg/mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.2"]
Explanation
Given:
Ordered dose of Atropine Sulfate: 0.01 mg/kg
Child's weight: 44 pounds
Step 1: Convert child's weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Child's weight in kg = 44 lbs x 0.453592 kg/lb = 19.958 kg
Step 2: Calculate the total dose of Atropine Sulfate:
Total dose (mg) = Ordered dose (mg/kg) x Child's weight (kg)
Total dose (mg) = 0.01 mg/kg x 19.958 kg
Total dose (mg) = 0.19958 mg
Step 3: Round to the nearest tenth:
Total dose (mg) ≈ 0.2 mg
Correct Answer is ["8.3"]
Explanation
Given:
Volume of fluid: 500 mL
Infusion rate: 60 mL/hour
Formula:
Infusion time (hours) = Volume (mL) / Infusion rate (mL/hour)
Step 1: Calculate the infusion time:
Infusion time (hours) = 500 mL / 60 mL/hour
Infusion time (hours) = 8.33 hours
Step 2: Round to the nearest tenth:
Infusion time (hours) ≈ 8.3 hours
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