A nurse is preparing to administer heparin 10,000 units subcutaneous every 8 hr. Available is heparin injection 20,000 units/mL. How many mL should the nurse administer per 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 ["0.5"]
1. Heparin Dosage and Concentration:
Heparin dosage per dose: 10,000 units
Heparin concentration: 20,000 units/mL (available injection)
2. Volume Calculation:
We can use the following formula to find the volume to administer:
Volume (mL) = Dosage (units) / Concentration (units/mL)
Volume (mL) = 10,000 units / 20,000 units/mL
3. Rounding the Answer:
Round the calculated volume to the nearest tenth of a milliliter.
Volume (mL) = 0.5 mL (rounded to one decimal place)
Therefore, the nurse should administer 0.5 mL of heparin injection per dose.
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Related Questions
Correct Answer is ["0.9"]
Explanation
1. Convert patient weight to kilograms (kg):
Weight (lb) = 99 lb
Conversion factor: 1 kg = 2.2 lb
Weight (kg) = 99 lb / 2.2 lb/kg
Weight (kg) = 45 kg (rounded to one decimal place)
2. Calculate the total morphine dosage:
Morphine dosage (mg/kg) = 0.2 mg/kg (given)
Weight (kg) = 45 kg (calculated)
Total morphine dosage (mg) = Dosage (mg/kg) x Weight (kg)
Total morphine dosage (mg) = 0.2 mg/kg x 45 kg
Total morphine dosage (mg) = 9 mg (rounded to one decimal place)
3. Determine the volume to administer based on medication concentration:
Morphine concentration (mg/mL) = 10 mg/mL (available injection)
Total morphine dosage (mg) = 9 mg (calculated)
Volume (mL) = Dosage (mg) / Concentration (mg/mL)
Volume (mL) = 9 mg / 10 mg/mL
4. Round the answer to the nearest tenth:
Volume to administer = 0.9 mL (rounded to one decimal place)
Therefore, the nurse should administer 0.9 mL of morphine injection.
Correct Answer is ["5.1"]
Explanation
To calculate the correct dose of methylprednisolone, we need to follow these steps:
-
Convert pounds to kilograms:
- 64 lb * 0.4536 kg/lb = 29 kg
-
Calculate the daily dose in milligrams:
- 7 mg/kg/day * 29 kg = 203 mg/day
-
Calculate the dose per administration:
- Since the medication is divided into two doses, divide the daily dose by 2:
- 203 mg/day / 2 = 101.5 mg/dose
- Since the medication is divided into two doses, divide the daily dose by 2:
-
Determine the volume needed from the available concentration:
- 101.5 mg * (1 mL / 20 mg) = 5.075 mL
Therefore, the nurse should administer 5.1 mL of methylprednisolone per dose.
Answer: 5.1 mL
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