A nurse is preparing to administer heparin 2.000 units by IV bolus. Available is heparin injection 5.000 units/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.4"]
Step-by-Step Calculation
Understanding the Problem
We need to administer 2000 units of heparin.
The available concentration of heparin is 5000 units/mL.
We need to find the volume to administer.
Calculations
Set up a proportion:
5000 units / 1 mL = 2000 units / x mL
Cross-multiply:
5000x = 2000
Solve for x:
x = 2000 / 5000
x = 0.4 mL
The nurse should administer 0.4 mL of heparin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A) The nurse administers the prescribed dosage: Given the toddler weighs 20 kg and the recommended dosage range is 20 to 25 mg/kg/day, the total daily dosage required would be between 400 mg (20 kg × 20 mg/kg) and 500 mg (20 kg × 25 mg/kg). The prescribed dosage is 100 mg every 8 hours, which totals 300 mg/day (100 mg × 3 doses/day). This is below the recommended dosage range, indicating it might be insufficient.
B) The nurse determines the prescription is insufficient to achieve the desired effect: The prescribed dosage of 300 mg/day is less than the minimum recommended dosage of 400 mg/day. Therefore, it is appropriate to determine that the prescription may be insufficient for the required therapeutic effect.
C) The nurse contacts the pharmacist to adjust the prescribed dosage: While it is correct to recognize that the dosage might be insufficient, the nurse should first consult with the healthcare provider to adjust the prescription based on clinical judgment and specific patient needs rather than contacting the pharmacist directly.
D) The nurse determines the prescription is above the recommended dosage range: The prescribed dosage of 300 mg/day is actually below the recommended range of 400 to 500 mg/day. Therefore, it is incorrect to determine that the prescription is above the recommended range.
Correct Answer is ["120"]
Explanation
The nurse is administering Ringer’s lactate by continuous IV infusion at a rate of 120 mL/hr. The drop factor of the manual IV tubing is 60 gtt/mL.
To find out how many gtt/min the IV flow rate should be set to, we can use the formula:
Flowrate(gtt/min) = Volume(mL/hr) × Dropfactor(gtt/mL) / 60min/hr
Substituting the given values:
Flowrate(gtt/min) = 120mL/hr × 60gtt/mL / 60min/hr = 120gtt/min
So, the nurse should set the manual IV infusion to deliver 120 gtt/min.
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