Worked example

IV flow rate (mL/hr) — practice problem 12

An order reads: infuse 500 mL of lactated Ringer's over 6 hours using an IV pump.

Volume500 mL
Time6 hr

What rate (mL/hr) should the pump be set to?

Answer: 83 mL/hr

Step-by-step solution

1. Divide the volume by the time in hours
500 mL ÷ 6 hr
= 83.33 mL/hr
2. Round to a whole mL/hr the pump can be set to
83.33 mL/hr ≈ 83 mL/hr
= 83 mL/hr

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