A patient is ordered 40 units/kg IV bolus of Heparin. The patient weighs 154 lbs. Heparin is supplied 25000 units/250mL. How many mL will the nurse administer?
The Correct Answer is ["28"]
Let's calculate the dosage step-by-step:
1. Convert pounds to kilograms:
154 lbs x 2.2 kg = 70 kg
2. Calculate the total dosage:
40 units/kg x 70kg = 2800 units
3. Determine the concentration of heparin in the solution:
25000 units / 250 mL = 100 units/mL
4. Calculate the volume needed:
2800 units / 100 units/mL ≈ 28 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.4"]
Explanation
To determine the correct volume to administer, follow these steps:
1. Convert the available concentration to mg/mL:
6 grams = 6000 mg (since 1 gram = 1000 mg)
Therefore, 6000 mg / 10 mL = 600 mg/mL.
2. Calculate the volume to administer:
The ordered dose is 250 mg.
Volume to administer = 250 mg / 600 mg/mL = 0.4167 mL.
3. Round to the nearest tenth:
0.4167 mL rounded to the nearest tenth is 0.4 mL.
Correct Answer is ["538"]
Explanation
1. Convert pounds to kilograms: 1 pound = 0.453592
158 lbs x 0.453592 kg/lb ≈ 71.71 kg
2. Calculate the total daily dosage:
15 mg/kg/day x 71.71 kg ≈ 1075.65 mg/day
3. Calculate the dosage per dose (divided equally every 12 hours):
1075.65 mg/day / 2 doses ≈ 537.83 mg/dose
4. Round to the nearest whole number:
537.83 mg ≈ 538 mg
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