A nurse is preparing to administer buprenorphine 4 mcg/kg IV bolus to a child who weighs 74 lb. Available is buprenorphine injection 0.3 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.45"]
Calculating the total dose in mg:
Convert the child's weight to kg: 74 lb ÷ 2.2 lb/kg = 33.64 kg
Calculate the total dose: 33.64 kg × 4 mcg/kg = 134.56 mcg
Converting mcg to mg:
1 mg = 1000 mcg
134.56 mcg ÷ 1000 mcg/mg = 0.13456 mg
Calculating the volume to administer:
Use the concentration of the medication: 0.13456 mg ÷ 0.3 mg/mL = 0.45 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.67"]
Explanation
Identify the formula for volume to administer:
Volume (mL)=Dose ordered (mg)/Available concentration (mg/mL)
Substitute the given values:
Dose ordered = 25 mg
Available concentration = 37.5 mg/mL
Volume=25/37.5=0.6667mL.
Round to the nearest hundredth:
0.6667=0.67mL.
Correct Answer is ["0.73"]
Explanation
Step 1: Convert the toddler's weight from pounds to kilograms.
The conversion factor is 1 kg = 2.2 lb.
Weight in kg= 32/2.2≈14.55 kg
Step 2: Calculate the required dose of ondansetron in mg.
Total dose of ondansetron needed:
Dose in mg=0.1 mg/kg×14.55 kg=1.455 mg
Step 3: Determine the volume of ondansetron to administer.
To determine how many mL the nurse should administer, we use the formula:
Volume (mL)=Dose in mg/Concentration in mg/mL=1.455 mg/2 mg/mL=0.7275 mL
Step 4: Round the answer.
Rounding off 0.7275 mL gives 0.73 mL.
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