![]() Perspectives of patients with type 1 or insulin-treated type 2 diabetes on self-monitoring of blood glucose: a qualitative study. † This means they can be confident in the accuracy of the system, and they can be confident the accuracy they're receiving is what is reported, without being affected by discrepancies caused by finger prick calibration.įind out more about flash glucose monitoring and the FreeStyle Libre 2 system in our FreeStyle Academy The FreeStyle Libre 2 flash glucose monitoring sensor is calibrated at the factory - so people with diabetes won’t need to calibrate it using a finger prick, ever. 7Ĭalibration 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 7 without the need for fingerprick calibrations †. How accurate are the FreeStyle Libre Systems? People with diabetes must scan once every 8 hours for a complete glycaemic picture, ensuring they remain engaged with their glucose monitoring throughout the day. They consist of a small, discreet sensor worn on the back of the arm with a reader or phone app ◊ to scan the sensor. The FreeStyle Libre systems are the leading sensor glucose monitoring devices globally 5 and the only flash glucose monitoring systems in the UK. ![]()
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