A nurse is preparing to administer ceftazidime 750 mg IM. Available is ceftazidime 1 g vial.
The nurse reconstitutes the medication to yield a final concentration of ceftazidime 280 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["2.7 "]
Volume (mL) = Desired dose / Concentration
Volume (mL) = 750 mg / 280 mg/mL
Volume (mL) rounded off to the nearest tenth ≈ 2.7 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1.4 "]
Explanation
Given:
- Desired dose of midazolam: 7 mg
- Available strength of midazolam injection: 5 mg/mL
The milliliters of midazolam correspond to the desired dose: Volume (mL) = Desired dose / Concentration
Volume (mL) = 7 mg / 5 mg/mL
Volume (mL) = 1.4 mL
So, the nurse should administer approximately 1.4 mL of midazolam.
Correct Answer is ["0.4 "]
Explanation
Given:
- Desired dose of chlorpromazine: 0.55 mg/kg every 6 hours
- Child's weight: 44 lb
- Available strength of chlorpromazine injection: 25 mg/mL
First, convert the child's weight from pounds to kilograms:
44 lb ÷ 2.20462 = 20 kg
Now, let's calculate the desired dose of chlorpromazine:
Desired dose = Dosage per kg × Weight Desired dose = 0.55 mg/kg × 20 kg Desired dose = 11 mg
Now, let's find out how many milliliters of chlorpromazine correspond to this dose: Volume (mL) = Desired dose / Concentration
Volume (mL) = 11 mg / 25 mg/mL Volume (mL) ≈ 0.44 mL
So, the nurse should administer approximately 0.4 mL of chlorpromazine per dose.
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