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.)
The Correct Answer is ["1.5"]
To calculate the amount of phenobarbital injection needed for each dose after the initial dose, we need to divide the prescribed dose (200 mg) by the concentration of the injection (130 mg/mL). This gives us:
200 mg / 130 mg/mL = 1.538 mL
To round this to the nearest tenth, we look at the hundredths place and see that it is 3, which is less than 5, so we round down and drop the rest of the digits. This gives us:
1.5 mL
Therefore, the nurse should administer 1.5 mL of phenobarbital injection per dose after the initial dose.
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Related Questions
Correct Answer is ["1.5"]
Explanation
To calculate the amount of phenobarbital injection needed for each dose after the initial dose, we need to divide the prescribed dose (200 mg) by the concentration of the injection (130 mg/mL). This gives us:
200 mg / 130 mg/mL = 1.538 mL
To round this to the nearest tenth, we look at the hundredths place and see that it is 3, which is less than 5, so we round down and drop the rest of the digits. This gives us:
1.5 mL
Therefore, the nurse should administer 1.5 mL of phenobarbital injection per dose after the initial dose.
Correct Answer is ["60"]
Explanation
To calculate the infusion rate of lidocaine, we need to convert the dose from mg/min to mg/hr and then to mL/hr.
The prescribed dose is 4 mg/min, so the hourly dose is 4 x 60 = 240 mg/hr.
The concentration of the drug is 1 g in 250 mL, which is equivalent to 1000 mg in 250 mL or 4 mg in 1 mL.
Therefore, the volume per hour is 240 / 4 = 60 mL/hr.
Rounded to the nearest whole number, the nurse should set the IV pump to deliver 60 mL/hr.
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