A nurse is preparing to administer ceftriaxone 75 mg/kg/day IM in two divided doses to a child who weighs 37 lb. The amount available after reconstitution is ceftriaxone 350 mg/mL. 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 ["1.8 "]
Given:
- Desired dose of ceftriaxone: 75 mg/kg/day
- Child's weight: 37 lb
- Available strength of ceftriaxone after reconstitution: 350 mg/mL
First, convert the child's weight from pounds to kilograms: 37 lb ÷ 2.20462 = 16.78 kg (rounded to the nearest hundredth)
The total daily dose of ceftriaxone:
Total daily dose = Desired dose × Child's weight
Total daily dose = 75 mg/kg/day × 16.78 kg Total daily dose ≈ 1258.5 mg
Since the total daily dose is to be divided into two equal doses, each dose would be:
Each dose = Total daily dose / Number of doses per day Each dose = 1258.5 mg / 2
Each dose = 629.25 mg
The milliliters of ceftriaxone correspond to each dose:
Volume (mL) = Dose / Concentration
Volume (mL) = 629.25 mg / 350 mg/mL Volume (mL) ≈ 1.8 mL
So, the nurse should administer approximately 1.8 mL of ceftriaxone per dose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["2 "]
Explanation
Given:
- Desired dose of levothyroxine: 0.05 mg
- Available strength of levothyroxine tablets: 25 mcg
First, convert the desired dose from milligrams to micrograms:
0.05 mg = 50 mcg
Number of tablets = Desired dose / Strength per tablet
Number of tablets = 50 mcg / 25 mcg/tablet Number of tablets = 2 tablets
So, the nurse should plan to administer 2 tablets of levothyroxine.
Correct Answer is ["1.4 "]
Explanation
Given:
- Desired dose of midazolam: 7 mg
- Available strength of midazolam injection: 5 mg/mL
The milliliters of midazolam correspond to the desired dose: Volume (mL) = Desired dose / Concentration
Volume (mL) = 7 mg / 5 mg/mL
Volume (mL) = 1.4 mL
So, the nurse should administer approximately 1.4 mL of midazolam.
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