A nurse is preparing to administer promethazine 15 mg IM to a child. The amount available is promethazine 50 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 ["0.3"]
Step by step calculation:
The desired dose of promethazine is 15 mg.
The available concentration is 50 mg/mL.
Calculating the volume to administer:
Use the concentration of the medication: 15 mg ÷ 50 mg/mL = 0.3 mL
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Related Questions
Correct Answer is ["1.6"]
Explanation
Step by step calculation:
The child's weight is 36 lb.
The medication dosage is 1 mg/kg.
The available medication concentration is 10 mg/mL.
Calculating the total dose in mg:
Convert the child's weight to kg: 36 lb ÷ 2.2 lb/kg = 16.36 kg
Calculate the total dose: 16.36 kg × 1 mg/kg = 16.36 mg
Calculating the volume to administer:
Use the concentration of the medication: 16.36 mg ÷ 10 mg/mL = 1.636 mL
Rounding the answer:
1.636 rounds to 1.6 mL
Correct Answer is ["2.1"]
Explanation
Step-by-step calculation:
The child's weight is 55 lb.
The medication dosage is 50,000 units/kg.
The available medication concentration is 600,000 units/mL.
Calculating the total dose in units:
Convert the child's weight to kg: 55 lb ÷ 2.2 lb/kg = 25 kg
Calculate the total dose: 25 kg × 50,000 units/kg = 1,250,000 units
Calculating the volume to administer:
Use the concentration of the medication: 1,250,000 units ÷ 600,000 units/mL = 2.0833 mL
Rounding the answer:2.0833 rounds to 2.1 mL
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