![]() This can help users stay safe, especially when sleeping, and alert them any time their glucose levels might need immediate attention. Users can adjust the settings for their own preferences on when they want to be alerted: Users have an option to turn on real-time alerts, to hear a beep or feel a vibration whenever their glucose levels dip too low or high. Regardless of which device you use, scanning is fast, easy, and can be done over any type of clothing, even thick jackets. However, Abbott received approval for this mobile app functionality in late July 2021 so you could scan the sensor and see data on your compatible smartphone. Instead, you still needed to use the separate handheld reading device to scan the sensor and see glucose results. ![]() While the original Libre model allows the use of a smartphone app for scanning, the Libre 2 didn’t originally allow for this because it wasn’t cleared by the FDA. It does not officially require any fingerstick calibrations before making insulin dosing or other treatment decisions. The latest sensor approved in the United States since 2018 lasts up to 14 days. With just a 1-second scan, users can see their glucose reading, trend arrow, and 8-hour history. When inserted, there is a 1-hour warmup period before glucose data is available. It is approved by the Food and Drug Administration (FDA) for use only on the upper arm, and attached to the skin using an easy-push inserter device. The sensor measures interstitial fluid every minute. Users wear a little white disc sensor about the size and thickness of two stacked quarters, and hold the handheld reader or smartphone app over it (about.
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