Calculation For Infusion Pump 5x1d6x

Calculation for infusion pump

FLOW RATE • Calculation of IV Flow Rate: mL per hour • eg: Deliver 250 mL IV over the next 2 hours by infusion pump

Total mL X mL   mL/h Total h 1h 250 mL X mL  2h 1h X  125 mL

IV Flow Rate: drops per min

Formula for IV flow rate for manually regulated IVs ordered in mL per hour or for minutes

Calculation of drops per min • EG: 125 mL per hour , Infusion set is calibrated for a drop factor of 10 drops per mL • Calculation of drops per min: 125 mL 125 mL 10 gtt  10 gtt/mL   60 min 60 min 1 mL

 20.8 gtt/min

•

Adjust roller clamp to deliver 21 drops per min (count)

Contd… • When IV drop factor is 60 drops per mL (microdrip sets) – Flow rate in drops per min is same as volume ordered in mL per hour – Eg: IV to be delivered at 50 mL per h and the Drop factor is 60 drops per mL

Calculation of gtt per min: Microdrip Drop Factor

50 mL  60 gtt per mL 60 min

 50 drops per min Notice order, 50 mL per hour, is the same as the flow rate of 50 drops per min when drop factor is 60 drops per mL

Drop Factor Constants • 125 mL per hour IV with 20 drops per mL infusion set 125 mL  20 gtt/mL 60 min

 41.6 gtt/min  42 gtt/min

Drop Factor Constants

IV flow rate calculation mL per hour  gtt per min Drop factor constant

IV Fluid Volume • To calculate IV volume – Flow rate (drops per min), drop factor, and time are known:

V  C   R; T

“V” is the unknown

IV Fluid Volume • To calculate total infusion volume – mL is known:

Total hours  mL per hour  Total volume

Or, use ratio-proportion:

IV Infusion Time • To calculate IV infusion time • Flow rate in drops per min

V  C   R; T “T” is the unknown

– Drop factor and volume are known

Or, use ratio-proportion

mL Total mL  h X  total h