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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Related Questions
Correct Answer is ["125"]
Explanation
To solve this, the nurse needs to use the formula:
Infusion rate (mL/hr) = Volume (mL) / Time (hr)
Plugging in the given values, we get:
Infusion rate (mL/hr) = 1,500 mL / 12 hr
Simplifying, we get:
Infusion rate (mL/hr) = 125 mL/hr
Correct Answer is ["0.9"]
Explanation
To calculate the dose of fentanyl for a client who weighs 187 lb, the nurse needs to convert the weight to kilograms and multiply it by the prescribed dose of 0.5 mcg/kg.
One kilogram is equal to 2.2 lb, so the client's weight in kilograms is 187 / 2.2 = 85 kg.
The dose of fentanyl in micrograms is 85 x 0.5 = 42.5 mcg.
The nurse then needs to divide the dose in micrograms by the concentration of fentanyl in the available solution, which is 50 mcg/mL.
The volume of fentanyl in milliliters is 42.5 / 50 = 0.85 mL.
The nurse should round the answer to the nearest tenth, so the final answer is 0.9 mL.
The nurse should administer 0.9 mL of fentanyl via IV bolus to the client.
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