A fingerstick* test using a blood glucose meter is required during times of rapidly changing glucose levels when interstitial fluid glucose levels may not accurately reflect blood glucose levels or if hypoglycaemia or impending hypoglycaemia is reported by the System or when symptoms do not match the System readings 

1. Haak, Thomas., et al. Flash glucose-sensing technology as a replacement for blood glucose monitoring for the management of insulin-treated type 2 diabetes: a multicenter, open-label randomized controlled trial. Diabetes Therapy 8.1 (2017): 55-73  

2.  Data on file, Abbott Diabetes Care, Inc. 

Internal data; patient installed base and sales information publicly disclosed by DexCom and Medtronic  

*Data based on the number of users worldwide for the FreeStyle Libre system compared to the number of users for other leading personal use sensor based glucose monitoring systems

3.   Bailey Timothy., et al. The Performance and Usability of a Factory-Calibrated Flash Glucose Monitoring System. Diabetes Technology &Therapeutics.2015;17(11):787-794

4.  Abbott Data on file.  Do not submerge the FreeStyle Libre sensor for more than 30 minutes at a time and not deeper than 1 meter below the surface.FreeStyle, Libre, and associated brand names are trademarks of Abbott. Other brands are the property of their respective manufacturers. iPhone and App Store are trademarks of Apple Inc.