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.
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Related Questions
Correct Answer is C
Explanation
a. Store the medication at room temperature following reconstitution: This option is incorrect. While it provides information about the storage of the medication after reconstitution, it doesn't pertain to the reconstitution process itself. Storage information is essential but not part of the reconstitution process.
b. Use 0.9% sodium chloride solution as a diluent: This option is incorrect. The label instructions mention adding water for reconstitution, not sodium chloride solution. Using the wrong diluent can result in incorrect drug concentrations and potential harm to the patient.
c. Discard any remaining medication after 10 days: This option is correct. The label clearly states that the reconstituted medication should be discarded after 10 days. This is important information for safe medication administration.
d. Roll the vial gently in hands to mix the medication: This option is incorrect. The label instructions specify shaking vigorously to wet the powder and then adding the remaining water, followed by vigorous shaking. Rolling the vial gently is not mentioned in the label instructions.
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.
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