Worked example

IV infusion time - practice problem 1

An IV pump is running 100 mL of D5W at 150 mL/hr.

Volume100 mL
Rate150 mL/hr

How long will the infusion take (hours)?

Answer: 0.67 hr

Step-by-step solution

1. Divide the volume by the rate
100 mL ÷ ( 150 mL ÷ 1 hr )
2. Cancel mL and solve for hours
= 100 ÷ 150 hr
= 0.67 hr
3. Convert the decimal hours to hours and minutes
0.67 hr = 40 min
= 40 min

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