Libre 2 Glucose tester
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Using the FreeStyle Libre 2 Glucose Tester: A Comprehensive Guide
Introduction to the FreeStyle Libre 2
The Libre 2 glucose tester is a revolutionary device that differs from traditional finger prick testers. You wear a sensor and record the data on your mobile phone or a dedicated data reader. This allows for extensive monitoring of glucose levels throughout the day, enabling painless and frequent checks.
Continuous Glucose Monitoring
Continuous glucose monitoring helps manage diabetes more effectively by providing a 24-hour graph of glucose levels. It shows the impact of different choices and activities on your glucose levels.
How It Works
Sensor glucose readings are taken from the interstitial fluid, a thin layer of fluid surrounding the cells below your skin. The Libre 2 sensor glucose readings lag behind finger prick blood glucose readings by about 2.1 minutes for children and 2.4 minutes for adults. Although the readings from finger pricks and sensors may differ, both are accurate. It is still advisable to perform a finger prick test if you suspect hypoglycaemia.
Applying the Sensor
The Libre 2 sensor is applied to the back of the upper arm using a disposable device called an applicator. Here’s how to apply it:
- Select a site on the back of your upper arm, avoiding scars, moles, stretch marks, or injection sites.
- Wipe the site with the moist wipe provided in the pack.
- Peel the lid off the sensor pack and unscrew the applicator.
- Line up the mark on the applicator with the mark on the sensor pack.
- Press down firmly on a hard surface until it stops.
- Lift the sensor out of the pack; the applicator is now ready for use. Do not touch the sensor.
- Press the applicator over the site on your arm to release the sensor.
- Ensure the sensor is secure and dispose of the applicator and packaging.
Follow the app instructions to register your sensor. After a short setup time, the sensor is ready to take your first reading.
Taking Glucose Readings
To obtain a glucose reading, perform a quick, painless 1-second scan with the reader or the FreeStyle LibreLink app on your mobile phone over the sensor. Each scan provides:
- Current glucose reading
- Last 8 hours of glucose history
- A trend arrow indicating if glucose is rising, falling, or stable
The reader can even scan through clothing. You can set optional alarms in the app to alert you when your glucose readings are too high or too low.
Sensor Replacement and Maintenance
The sensors need to be replaced every 14 days, and the app will notify you when it's time for a replacement. Always read the instructions carefully and consult your medical professional if you have any questions.