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Published byAmelia Asche Modified over 5 years ago

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**IV infusions Calculating volume of fluid delivered over time:**

Volume (mL) = rate (mL/hr) x time Eg. 45 mL per hour x 7 hours = 315 mL Calculating amount of time required to deliver fluid: Time (h) =volume (mL) divided by rate (mL/h) Eg. Patient ordered 750mL of solution. Infusion pump is set at 60mL per hour. How long will it take? 750/60 = 12 ½ hours

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**Determining delivery rate:**

Rate (mL/h) = volume (mL) time (h) One litre of saline to be administered over 8 hours. 1000/8 = 125mL per hour 500mL of Hartmann’s solution over 7 hours. 500/7 = 71.4 = 71mL per hour

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**Drip rates: To calculate drip rates: Rate (drops/min) = volume (drops)**

time (minutes) 750mL of fluid is to be given over 5 hours. The IV set delivers 20 drops per ml. At what rate (in drops per minute) should it drip? 750 x 20 divided by time in hours 5 x 60 (min) 150/3 = 50 drops per min.

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**IV drip rates Calculate drip rates:**

An infant is ordered 150mL of Hartmann’s solution to run over 6 hours. The microdrip delivers 60 drops per mL. 0.5L of Dextrose 4% in 1/5 normal saline is to run over12 hours. The administration set delivers 20 drops per mL. 400mL of Normal Saline is to be infused over 10 hours using a microdrip giving set. The set delivers 60 drops per mL.

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