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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Related Questions
Correct Answer is ["3.4 "]
Explanation
Given:
- Desired dose of morphine: 0.3 mg/kg
- Client's weight: 99 lb
- Available strength of morphine oral solution: 4 mg/mL
First convert the client's weight from pounds to kilograms: 99 lb ÷ 2.20462 = 44.91 kg (rounded to the nearest hundredth)
The desired dose of morphine:
Desired dose = Client's weight × Dose per kg Desired dose = 44.91 kg × 0.3 mg/kg
Desired dose ≈ 13.473 mg
The milliliters of morphine oral solution this corresponds to:
Volume (mL) = Desired dose / Concentration Volume (mL) = 13.473 mg / 4 mg/mL Volume (mL) ≈ 3.37 mL
So, the nurse should administer approximately 3.4 mL of morphine oral solution.
Correct Answer is ["2.7 "]
Explanation
Volume (mL) = Desired dose / Concentration
Volume (mL) = 750 mg / 280 mg/mL
Volume (mL) rounded off to the nearest tenth ≈ 2.7 mL
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