A nurse is preparing to administer tobramycin 3 mg/kg/day IM divided in three equal doses to a client who weighs 50 kg. Available is tobramycin 40 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 ["1.3"]
Step-by-step solution:
1. Calculate the total daily dose:
Total daily dose = dose per kg/day x weight in kg = 3 mg/kg/day x 50 kg = 150 mg/day
2. Calculate the dose per administration:
Since the medication is divided into 3 doses per day,
Dose per administration = Total daily dose / number of doses = 150 mg/day / 3 doses = 50 mg/dose
3. Calculate the volume to administer:
The medication concentration is 40 mg/mL.
Volume = Dose per administration / Concentration = 50 mg / 40 mg/mL = 1.25 mL
4. Round to the nearest tenth:
Volume = 1.3 mL
Therefore, the nurse should administer 1.3 mL of tobramycin per dose
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["84"]
Explanation
The nurse should administer 8.4 mg of enoxaparin per dose.
Calculations:
Convert pounds to kilograms:
185 lb x 0.453592 kg/lb = 83.91 kg
Calculate the enoxaparin dose:
1 mg/kg x 83.91 kg = 83.91 mg
Round to the nearest tenth:
83.91 mg ≈ 84 mg
Therefore, the nurse should administer 84 mg of enoxaparin per dose.
Correct Answer is D
Explanation
A. Aspirin 81 mg PO daily:
Aspirin 81 mg daily is commonly used as a low-dose regimen for cardiovascular protection or as a preventive measure for certain conditions. This dosage is standard and does not require clarification.
B. Acetaminophen 1000 mg PO every 6 hours prn for mild-moderate pain:
The maximum recommended dose of acetaminophen is generally 4000 mg per day. A dose of 1000 mg every 6 hours, which totals up to 4000 mg daily, is within the acceptable limit for managing mild to moderate pain, assuming no liver dysfunction is present. This prescription is appropriate and does not need further clarification.
C. Ibuprofen 400 mg PO every 4 hours prn for mild-moderate pain:
Ibuprofen is typically dosed at 200 mg to 400 mg every 4 to 6 hours as needed. A dose of 400 mg every 4 hours is within the usual range for managing mild to moderate pain, and the total daily dosage should be monitored to avoid exceeding recommended limits. This prescription is generally acceptable.
D. Amoxicillin 250 mg tablet PO X7 days:
Amoxicillin is usually prescribed at higher doses for infections. A common dosage is 500 mg to 875 mg every 8 hours, depending on the infection being treated. The prescription of 250 mg for 7 days is unusually low and might not be effective for most infections, requiring clarification to ensure appropriate antibiotic therapy.
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