A patient with type 1 diabetes is receiving IV insulin for hyperglycemia. The order states to infuse insulin at 5 units per hour. The IV bag from pharmacy contains 100 units of regular insulin in 100 ml. What rate (in ml/hr) should the nurse program into the IV pump?
The Correct Answer is ["5"]
Calculation:
Prescribed Rate: 5 units/hr
IV Concentration: 100 units in 100 mL
- Calculate the concentration in units per mL
Concentration = 100 units ÷ 100 mL
= 1 unit/mL
- Calculate the infusion rate in mL/hr
Infusion Rate (mL/hr) = Prescribed Rate ÷ Concentration
Infusion Rate = 5 ÷ 1
Infusion Rate = 5 mL/hr
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["33"]
Explanation
Calculation:
- Identify the total volume and infusion time
Total Volume: 50 mL
Infusion Time: 90 minutes → 1.5 hours
- Calculate the infusion rate
Infusion Rate (mL/hr) = Total Volume ÷ Time (hr)
Infusion Rate = 50 ÷ 1.5
Infusion Rate = 33.33 mL/hr
- Round to the nearest whole number
Infusion Rate = 33 mL/hr
Correct Answer is B
Explanation
A. Taking lispro 30 minutes before eating increases the risk of hypoglycemia because rapid-acting insulin begins working within 10–15 minutes. Food intake may not yet match the insulin’s onset of action.
B. Rapid-acting insulin such as lispro is designed to be given within 15 minutes of starting a meal so insulin action closely matches postprandial glucose rise. This timing reduces hyperglycemia while minimizing hypoglycemia risk.
C. Administering lispro after finishing a meal delays insulin action relative to glucose absorption. This can result in postprandial hyperglycemia because blood glucose may already be elevated.
D. Taking lispro at the same time each night is inconsistent with its purpose of controlling mealtime glucose spikes. Long-acting insulin, not rapid-acting insulin, is scheduled independently of meals.
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