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
Given:
- Desired dose of metronidazole: 7.5 mg/kg
- Client's weight: 146.7 lb
- Available strength of metronidazole tablets: 500 mg
First, convert the client's weight from pounds to kilograms:
146.7 lb ÷ 2.20462 = 66.57 kg (rounded to the nearest hundredth)
Now, calculate the desired dose of metronidazole:
Desired dose = Dosage per kg × Weight Desired dose = 7.5 mg/kg × 66.57 kg Desired dose ≈ 498.775 mg
Next, find out how many tablets are needed to achieve this dose: Number of tablets = Desired dose / Strength per tablet
Number of tablets = 498.775 mg / 500 mg Number of tablets ≈ 0.997
Since we cannot administer a fraction of a tablet, the nurse should administer 1 tablet of metronidazole.
Correct Answer is ["50"]
Explanation
Total daily dose = 200 mg Frequency = Every 6 hours Total number of doses =24/6
=4 doses
Total dose = 200mg Per dose= 200mg/4
= 50mg
So, the nurse should administer 50 mg per dose.
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