A nurse is preparing to administer tobramycin 3 mg/kg/day IM in three divided doses to a client who weighs 85 kg. The amount 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 ["2.1"]
To calculate the dosage of tobramycin for a client who weighs 85 kg, the nurse should first determine the total daily dose by multiplying the weight by the prescribed dose per kg.
This gives 3 mg/kg/day x 85 kg = 255 mg/day.
Next, the nurse should divide the total daily dose by the number of doses per day to get the dose per administration.
This gives 255 mg/day / 3 doses/day = 85 mg/dose.
Finally, the nurse should use the formula D/H x Q to find the volume to be administered, where D is the desired dose, H is the dose on hand, and Q is the quantity on hand.
This gives 85 mg/dose / 40 mg/mL x 1 mL = 2.125 mL/dose.
Therefore, the nurse should administer 2.1 mL of tobramycin per dose to the client.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["167"]
Explanation
To calculate the infusion rate for dextrose 5% in water 1,000 mL IV, the nurse should use the following formula: Volume (mL) / Time (hr) = Rate (mL/hr).
In this case, the volume is 1,000 mL and the time is 6 hr.
Therefore, the rate is 1,000 mL / 6 hr = 166.67 mL/hr.
Therefore, the nurse should round up to 167 mL/hr.
Correct Answer is ["0.35"]
Explanation
To calculate the dosage of epoetin alfa for a client, the nurse needs to use the following formula:
Dose (mL) = Ordered dose (units) / Available dose (units/mL)
Plugging in the values from the question, we get:
Dose (mL) = 7,000 units / 20,000 units/mL
Dose (mL) = 0.35 mL
The nurse should administer 0.35 mL of epoetin alfa to the client once a week.
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