A nurse is preparing to administer ceftriaxone 250 mg IM to an adult client who has a gonococcal infection. The label on the vial indicates to reconstitute each vial with sterile water 2.1 mL to yield ceftriaxone 350 mg/mL. How many mL of the reconstituted medication should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.71"]
To calculate how many milliliters (mL) of the reconstituted medication to administer, you need to determine the desired dose and then divide it by the concentration of the reconstituted solution.
The label indicates that each vial, when reconstituted, contains ceftriaxone 350 mg/mL.
The desired dose is 250 mg.
So, you can use the following formula:
Volume to administer (mL) = Desired dose (mg) / Concentration of the reconstituted solution (mg/mL)
Volume to administer (mL) = 250 mg / 350 mg/mL
Volume to administer (mL) = 0.7143 mL (rounded to the nearest hundredth)
Therefore, the nurse should administer approximately 0.71 mL of the reconstituted ceftriaxone solution.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["10"]
Explanation
To calculate the volume in milliliters (mL) of amoxicillin oral suspension needed to administer 775 mg, you can use the following formula:
Volume (mL) = (Desired dose in mg / Concentration in mg/mL)
Given:
- Desired dose = 775 mg
- Concentration = 400 mg/5 mL
First, calculate the concentration in mg/mL by dividing 400 mg by 5 mL:
Concentration = 400 mg / 5 mL = 80 mg/mL
Now, use the formula to calculate the volume in mL:
Volume (mL) = (775 mg / 80 mg/mL)
Volume (mL) ≈ 9.69 mL
Rounded to the nearest whole number, the nurse should administer approximately 10 mL of amoxicillin oral suspension to provide a dose of 775 mg.
Correct Answer is ["0.5"]
Explanation
To calculate the volume (mL) needed to administer 25 mg of promethazine using a concentration of 50 mg/mL, you can use the following formula:
Volume (mL) = Dose (mg) / Concentration (mg/mL)
In this case, the dose is 25 mg, and the concentration is 50 mg/mL:
Volume (mL) = 25 mg / 50 mg/mL = 0.5 mL
So, the nurse should administer 0.5 mL of promethazine.
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