Analysis of accuracy for the Freestyle Libre glucose monitor
The purpose of the study was to evaluate the performance and usability of the FreeStyle® Libre™ Flash glucose monitoring system (Abbott Diabetes Care, Alameda, CA) for interstitial glucose results compared with capillary blood glucose results.
The takeaway from this study is that the sensor provides a larger number of measurements, including day and night readings, which can be used to evaluate glucose patterns and trends. In comparison, BG readings via fingerstick provide single, intermittent measurements, which may not capture intervals of extreme variability or those overnight high and low points. In a recent study, it was demonstrated that the use of continuous glucose monitoring with or without alarms reduces time spent outside glucose targets compared with only self-monitoring of BG via fingerstick. The Libre system provides the user with the current glucose result, glucose pattern, and trend information on the display of the hand-held reader when the sensor is scanned. This type of monitoring system may benefit individuals who have ceased sensor use due to alarm fatigue, becoming overwhelmed by alarms or for those who have not been able to use a CGM type system due to cost. Further research is needed to evaluate whether the Libre System could provide additional benefits such as improvement in glycemic outcomes with continued use over time, as well as improved compliance with sensor wear regardless of alarms for low and high values.
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