Practice Quiz

CRNE Exam Prep

Category - Changes in Health

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A physician orders regular insulin at 10 units per hour to be administered by IV infusion pump. An IV infusion bag is labeled 100 units of regular insulin in 500 ml of 5% dextrose in water. The nurse prepares to set the infusion pump at how many millimeters per hour?
  1. 10 ml
  2. 20 ml
  3. 50 ml
  4. 100 ml
Explanation
Answer: C - Initially, determine the number of insulin in 1 ml, and then calculate for the infusion rate.

Step 1:
Known amount of insulin in solution = Amount of insulin per ml
Total volume of diluent
100 units = 0.2 unit/ml
500 ml

Step 2:
Dose per hour desired = milliliters per hour
Concentration per ml

10 units per hour = 50 milliliters per hour
0.2 unit/ml
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