A nurse is preparing to infuse 10 units/hr of regular insulin for a client with diabetic ketoacidosis (DKA). The amount available is 100 units in a 150 mL bag of 0.9 sodium chloride. How will the nurse set up the flow rate (mL/hr)? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["15"]
Given:
Total units of insulin: 100 units
Total volume: 150 mL
Desired infusion rate: 10 units/hr
Determine the infusion time:
If the nurse is infusing 10 units/hr and has 100 units total, the infusion time will be:
100 units / 10 units/hr = 10 hours
Calculate the flow rate in mL/hr:
Total volume of 150 mL needs to be infused over 10 hours.
The flow rate is:
150 mL / 10 hr = 15 mL/hr
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["5"]
Explanation
Given:
Total units of insulin: 75 units
Total volume: 100 mL
Desired infusion rate: 4 units/hr
Steps to solve:
Determine the infusion time:
If the nurse is infusing 4 units/hr and has 75 units total, the infusion time will be:
75 units / 4 units/hr = 18.75 hours (approximately 19 hours)
Calculate the flow rate in mL/hr:
Total volume of 100 mL needs to be infused over 19 hours.
The flow rate is:
100 mL / 19 hr = 5.26 mL/hr
Round to the nearest whole number:
5 mL/hr.
Correct Answer is ["20"]
Explanation
Given:
Prescribed dose: 30 mg of dextromethorphan
Available concentration: 7.5 mg/5 mL
Steps to solve:
Calculate the volume to be administered:
We can set up a proportion to solve for the unknown volume (X):
7.5 mg/5 mL = 30 mg/X mL
Cross-multiplying gives us:
7.5 mg x X mL = 30 mg x 5 mL
Simplifying:
7.5X = 150
Solving for X:
X = 150 / 7.5 = 20 mL
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