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Understanding the difference between Accuracy, Resolution of Flow, and Continuity of Flow is essential when evaluating competitive infusion pumps.

Accuracy is used to gauge how closely the average pump flow rate correlates with the programmed rate. Accuracy measurements are typically based on an average fluid delivery over a pre-determined amount of time.

For example: If a pump is programmed to deliver 50mL per hour, measuring the amount of actual fluid delivered after 60 minutes can show how accurate the pump is. If the pump delivered 55mL of fluid in 60 minutes, it is determined to have an accuracy of +10%.


actual mL delivered / programmed mL = accuracy

55mL / 50mL = 1.10, or +10% accuracy


The pump in the example above is said to have an accuracy of ± 10%. Syringe pumps are generally considered to be the most accurate, with a flow accuracy of ±1 – 3%. Most peristaltic infusion pumps typically state a flow accuracy between ±2.5 – 6%. Elastomeric pumps generally claim a flow accuracy between ±12 – 25%.

An infographic describing pumping accuracy in more detail is shown below.

Why Your Choice of Infusion Pump Matters to Patient Outcomes

Understanding How Different Infusion Pump Technologies Impact Flow Accuracy, Resolution, and Continuity

A recently published whitepaper describes how different infusion pump technologies operate, and why Resolution and Continuity of Flow are important factors when choosing an infusion pump. If you are interested in learning more, please click the button below.