A nurse is preparing to administer phenobarbital sodium 300 mg. IV bolus to a client experiencing withdrawal from benzodiazepines .Available is phenobarbital sodium injection 130 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["2.3"]
Identify the Desired Dose and Available Concentration:
Desired Dose: 300 mg of phenobarbital sodium
Available Concentration: 130 mg/mL (This means there are 130 mg of phenobarbital sodium in every 1 mL of solution)
Set up the Calculation:
We need to find the volume (in mL) that contains the desired dose of 300 mg.
We can use the following formula:
Volume (mL) = Desired Dose (mg) / Available Concentration (mg/mL)
Plug in the Values and Calculate:
Volume (mL) = 300 mg / 130 mg/mL
Volume (mL) = 2.30769 mL
Round to the Nearest Tenth:
2.3 mL
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Related Questions
Correct Answer is ["1.4"]
Explanation
Determine the concentration of the olanzapine injection:
Available concentration: 300 mg / 2 mL
Calculate the volume (in mL) needed for a 210 mg dose:
Use the concentration as a conversion factor:
Volume (mL) = Ordered dose (mg) / Concentration (mg/mL) Volume (mL) = 210 mg / (300 mg / 2 mL)
Simplify the complex fraction:
Volume (mL) = 210 mg x (2 mL / 300 mg)
Calculate:
Volume (mL) = (210 x 2) / 300 = 420 / 300 = 1.4 mL
Correct Answer is ["2.5"]
Explanation
Convert Grams to Milligrams:
The prescribed dose is 0.05 grams (g).
We need to convert this to milligrams (mg) because the available medication is in mg/mL.
There are 1000 milligrams in 1 gram (1 g = 1000 mg).
So, 0.05 g x 1000 mg/g = 50 mg
Set up the Dosage Calculation:
We need to find out how many mL of the sertraline solution contain 50 mg.
The available concentration is 20 mg/mL. This means there are 20 mg of sertraline in every 1 mL of solution.
Divide the Desired Dose by the Concentration:
Divide the desired dose (50 mg) by the concentration (20 mg/mL): 50 mg / 20 mg/mL = 2.5 mL
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