The healthcare provider prescribes epoetin alfa 50 units/kg subcutaneously (SubQ) twice daily (BID) for a client who weighs 126 pounds. The available vial is labeled, "10,000 Units/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 hundredth.)
The Correct Answer is ["0.29"]
Here's how to calculate the volume (mL) of epoetin alfa the nurse should administer:
1. Client weight conversion:
Client weight: 126 pounds
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) = 126 pounds / 2.205 lbs/kg
Client weight (kg) = 57.14 kg (round to nearest hundredth)
2. Epoetin alfa dosage:
Prescribed dose: 50 units/kg (given)
3. Epoetin alfa concentration:
Vial label: 10,000 Units/mL
4. We need to find the volume (mL) to administer that provides the prescribed dose (50 units/kg) based on the client's weight (57.14 kg) and the medication concentration (10,000 Units/mL).
Calculation:
Total epoetin alfa dose (units): Dose (units/kg) x Client weight (kg)
Total epoetin alfa dose (units): 50 units/kg * 57.14 kg
Total epoetin alfa dose (units): 2857 units (round to nearest whole number)
Volume to administer (mL): Total dose (units) / Concentration (units/mL)
Volume to administer (mL): 2857 units / 10,000 Units/mL
Volume to administer (mL): 0.2857 mL (round to nearest hundredth as requested)
Therefore, the nurse should administer approximately 0.29 mL of epoetin alfa subcutaneously.
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Related Questions
Correct Answer is ["100"]
Explanation
Here's how to calculate the infusion rate (mL/hour) for the nurse to administer cefazolin:
We know:
Total volume of solution: 50 mL (given)
Dose of cefazolin: 1 gram (given) = 1000 milligrams (since 1 gram = 1000 milligrams)
Infusion duration: 30 minutes (given) = 0.5 hours (convert minutes to hours by dividing by 60)
We need to find:
Infusion rate (mL/hour)
Calculation:
Calculate the concentration of cefazolin in the solution (not required, but helpful to understand):
We aren't directly given the concentration, but we can see that 1 gram of cefazolin is delivered in 50 mL. Therefore, the concentration is:
Concentration = Dose (mg) / Volume (mL)
Concentration = 1000 mg / 50 mL
Concentration = 20 mg/mL
Calculate the infusion rate based on the total volume and duration:
Infusion rate (mL/hour) = Total volume (mL) / Infusion time (hours)
Infusion rate (mL/hour) = 50 mL / 0.5 hours
Infusion rate (mL/hour) = 100 mL/hour
Since we typically round infusion rates to whole numbers for ease of use with infusion pumps, the nurse should program the pump to deliver 100 mL/hour.
Correct Answer is ["100"]
Explanation
The medication is to be administered over 30 minutes,
so if we want to find out the rate in mL/hour,
we need to double the total volume because there are 60 minutes in an hour.
Therefore, the infusion pump should be set to deliver
50mL/30minutes × 60minutes / hour = 100mL/hour
So, the answer is 100. The nurse should program the infusion pump to deliver 100 mL/hour
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