IV Drug Calculation Tutorial

IV

Volume/Time – IV mL Rate Questions

Given a certain amount of liquid and a time period, what is the necessary IV flow rate in mL/hr? Measurement used when IV regulated electronically by infusion pump.

Formula:

Volume (mL)
Time (hr)
 =  Y (Flow Rate in mL/hr)

Example: Infuse 250 mL over the next 120 minutes by infusion pump.

Volume (mL)
Time (hr)
 =  Y (Flow Rate in mL/hr)

Convert 120 minutes to hours.

  • min → hr    ( ÷ by 60 )
  • 120 min ÷ 60 = 2 hr
250 mL
2 hr
 =  125 mL/hr

Example: Ordered 1000 mL D5W IV to infuse in 10 hours by infusion pump.

Volume (mL)
Time (hr)
 =  Y (Flow Rate in mL/hr)
1000 mL
10 hr
 =  100 mL/hr

 

 

 





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Anna C. RN-BC, BSN, PHN, CMSRN Anna began writing extra materials to help her BSN and LVN students with their studies. She takes the topics that the students are learning and expands on them to try to help with their understanding of the nursing process. She is a clinical instructor for LVN and BSN students along with a critical care transport nurse.

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