Worked example

IV infusion time — practice problem 3

An IV pump is running 1000 mL of D5 1/2 NS at 125 mL/hr.

Volume1000 mL
Rate125 mL/hr

How long will the infusion take (hours)?

Answer: 8 hr

Step-by-step solution

1. Divide the volume by the rate
1000 mL ÷ ( 125 mL ÷ 1 hr )
2. Cancel mL and solve for hours
= 1000 ÷ 125 hr
= 8 hr
3. Convert the decimal hours to hours and minutes
8 hr = 8 hr
= 8 hr

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