A nurse is preparing to administer ceftazidime 40 mg/kg IV bolus every 8 hr to a school-age child who weighs 77 lb. Available is ceftazidime injection 40 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["35"]
Step by step calculation:
Calculating the total dose in mg:
Convert the child's weight to kg: 77 lb ÷ 2.2 lb/kg = 35 kg
Calculate the total dose: 35 kg × 40 mg/kg = 1400 mg
Calculating the volume to administer:
Use the concentration of the medication: 1400 mg ÷ 40 mg/mL = 35 mL
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Related Questions
Correct Answer is ["1.2"]
Explanation
To calculate the dose:
Convert the child’s weight from pounds to kilograms:
1 kg = 2.2 lb
51 lb÷2.2=23.2 kg
Calculate the prescribed dose in mg:
0.1 mg/kg×23.2 kg=2.32 mg
Determine the volume in mL to administer:
The concentration of the medication is 2 mg/mL.
2.32 mg÷2 mg/mL=1.16 mL
Round to the nearest tenth:
1.16 = 1.2 mL
Correct Answer is ["2.7"]
Explanation
Step 1: Convert the child's weight from pounds to kilograms.
We know that 1 kg = 2.2 lb,
Weight in kg=Weight in lb=78/2.2≈35.45 kg
Step 2: Calculate the required dose of ondansetron in mg.
The prescribed dose is 0.15 mg per kg:
Dose in mg=0.15 mg/kg×35.45 kg=5.318 mg
Step 3: Determine the volume of ondansetron to administer.
To determine how many mL the nurse should administer, we use the following formula:
Volume (mL)=Dose in mg/Concentration in mg/mL=5.318 mg/2 mg/mL=2.659 mL
Step 4: Round the answer:
Rounding 2.659 mL gives 2.7 mL.
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