† This means you can be confident in the accuracy of the system, and you can be confident the accuracy you're receiving is what is reported, without being affected by discrepancies caused by finger prick calibration. The FreeStyle Libre 2 flash glucose monitoring sensor is calibrated at the factory - so you won’t need to calibrate it using a finger prick, ever. 5Īll values vs Yellow Springs Instruments (YSI)Ĭalibration is needed for commercially available CGM systems because the sensitivity of each sensor can vary within each batch that is made. The consensus Error Grid below shows 99.9% of readings in Zone A + B of the Consensus Error Grid. The higher the percentage of readings in Zones A and B, the more accurate the sensor is. This is reflected by the Consensus Error Grid by various areas on the graph labelled A to E. The closer the sensor reading to the reference blood glucose meter reading, the better the accuracy. The comparison between the 2 different readings is plotted on a graph called a Consensus Error grid. In this case the reference is a finger prick blood glucose reading which is taken at the same time as the sensor scan. To assess the accuracy of the FreeStyle Libre 2 sensor, the glucose readings the sensor provides are compared to a known independent reference. The FreeStyle Libre 2 system is accurate, stable and consistent over 14 days 8 without the need for fingerprick calibrations. How accurate is the FreeStyle Libre 2 System? You must scan once every 8 hours for a complete glycaemic picture, ensuring you remain engaged with your glucose monitoring throughout the day. They consist of a small, discreet sensor worn on the back of the upper arm with a FreeStyle Libre 2 reader or phone app ◊ to scan the sensor. The FreeStyle Libre systems* are the leading sensor glucose monitoring devices globally 7 and the only flash glucose monitoring systems* in the UK.
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