A nurse is preparing to administer chlorpromazine 0.55 mg/kg IM every 6 hr to a child who weighs 44 lb. Available is chlorpromazine 25 mg/mL injection. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.4 "]
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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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1"]
Explanation
Client's weight: 220 lb
Desired dose of enoxaparin: 1 mg/kg
Available strength of enoxaparin: 30 mg/0.3 mL
First, convert the client's weight from pounds to kilograms:
220 lb ÷ 2.20462 ≈ 99.79 kg
Now, calculate the desired dose of enoxaparin:
Desired dose = Dosage per kg × Weight Desired dose = 1 mg/kg × 99.79 kg ≈ 99.79 mg 30mg = 0.3ml
Therefore, 99.79mg = 99.79 * 0.3/30
=0.9979
Rounded off to the nearest whole number= 1ml
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.
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