Ati dosage calculation RN critical care proctored assessment 3.2 retake 1
Calculation
A nurse is caring for a client who has status epilepticus. The provider prescribes phenobarbital 400 mg IV bolus stat, then 200 mg IV bolus every 20 min until seizure activity stops, maximum 2 g. Available is phenobarbital injection 130 mg/mL. How many mL should the nurse administer per dose after the initial dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
mL
Explanation & Rationale
Desired dose per administration after the initial dose.= 200 mg. Available concentration of the phenobarbital injection = 130 mg/mL. Calculate the volume in milliliters (mL) to administer per dose. Volume per dose (mL) = Desired dose per administration (mg) / Available concentration (mg/mL) = 200 mg / 130 mg/mL = 1.538 mL. Round the answer to the nearest tenth. = 1.5 mL.
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