The healthcare provider prescribes filgrastim 5 mcg/kg subqutaneous (SubQ) for a client who weighs 176 pounds. The available vial is labeled, "Filgrastim 300 mcg/mL. Based on the client's weight, how many milliliters should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["1.3"]
Here's how to calculate the volume (mL) of filgrastim the nurse should administer:
Client weight conversion:
Client weight: 176 pounds
Since medication dosage is based on weight per kilogram (kg), we need to convert the weight to kg for accurate calculation.
Conversion factor: 1 kg = 2.205 lbs
Client weight (kg) = 176 pounds / 2.205 lbs/kg
Client weight (kg) = 80 kg (round to nearest whole number)
Filgrastim dose per kg:
Dose per kg = 5 mcg/kg (given)
Filgrastim concentration:
The medication vial is labeled 300 mcg/mL. This indicates there are 300 mcg of filgrastim in every 1 mL of solution.
We need to find the volume (mL) containing the prescribed dose (based on weight) of filgrastim (5 mcg/kg) considering the concentration (300 mcg/mL) in the vial.
Total filgrastim dose (mcg): Dose (mcg/kg) x Client weight (kg)
Total filgrastim dose (mcg): 5 mcg/kg * 80 kg
Total filgrastim dose (mcg): 400 mcg
Volume to administer (mL): Total dose (mcg) / Concentration (mcg/mL)
Volume to administer (mL): 400 mcg / 300 mcg/mL
Volume to administer (mL) = 1.33 mL (round to nearest tenth)
Therefore, the nurse should administer approximately 1.3 mL of filgrastim subcutaneously.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.25"]
Explanation
Here's how to calculate the volume the nurse should administer after reconstituting the medication:
Reconstitution:
The medication vial is labeled "0.3 mg with 1.2 mL of sterile water." This means adding 1.2 mL of diluent will result in a total volume of 1.2 mL solution.
Important Note:
The concentration of the medication after reconstitution is not explicitly provided on the label.
We cannot directly calculate the volume to administer based solely on the prescribed dose (0.0625 mg) and the unknown concentration.
Scenario:
In real-world practice, nurses rely on the medication information sheet or the manufacturer's label for dilution instructions and the final concentration after reconstitution.
This information is crucial for calculating the accurate volume to administer the prescribed dose.
Assuming the medication information sheet specifies:
After reconstitution with 1.2 mL diluent, the final concentration is 0.25 mg/mL.
Calculation (based on the assumed concentration):
Prescribed dose: 0.0625 mg
Volume to administer (mL) = Dose (mg) / Concentration (mg/mL)
Volume to administer (mL) = 0.0625 mg / 0.25 mg/mL
Volume to administer (mL) = 0.25 mL (round to nearest hundredth)
Therefore, based on the assumed concentration after reconstitution (0.25 mg/mL), the nurse should administer 0.25 mL to the client.
Correct Answer is ["440"]
Explanation
The pharmacy provides a 110 mL premixed solution of pantoprazole to be infused over 15 minutes.
First, let’s find out how many mL should be delivered per minute.
We divide the total volume by the total time in minutes:
RateinmL/min = 110mL /15min ≈ 7.33mL/min
We need to convert this to mL/hr since we want the rate in mL/hr.
There are 60 minutes in an hour, so:
RateinmL/hr = 7.33mL/min×60 = 440mL/hr
So, the nurse should program the secondary infusion to deliver 440 mL/hr.
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