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The FreeStyle Libre 3 Continuous Glucose Monitoring (CGM) system has been praised for its impressive accuracy with a staggering 7.9% MARD (mean absolute relative difference), even surpassing the FDA’s required parameters. Its 14-day sensor delivers reliable readings that help users manage their diabetes effectively. However, like any medical device, users may occasionally experience accuracy issues. Here are some potential causes and solutions for Freestyle Libre 3 accuracy problems.
Initial 24-Hour Adjustment Period
Whether you’re using the FreeStyle Libre 3, Libre 2, or even a Dexcom CGM, the first 24 hours after applying a new sensor can result in inconsistent readings. This occurs because:
- The sensor is acclimating to the subcutaneous environment.
- The body’s tissue may take time to adjust to the filament.
Solution: To minimize disruptions:
- Apply the new sensor on the opposite arm a day before your current sensor expires.
- Monitor closely during this period using fingerstick tests if necessary.
Common Sensor Issues and Their Remedies
1. Sensor Error Message
A “Sensor Error” message indicates the system’s inability to provide glucose readings. This could be due to:
- Calibration issues.
- External interference or incorrect sensor application.
What to Do:
- Tap the “i” information symbol on the app for specific instructions.
- Recheck after the suggested duration.
- If the issue persists, fill out the online sensor support request form or contact customer care at 855-632-8658.
2. Replace Sensor Message
This message may suggest a fault in the sensor. It typically occurs when the system detects an irreparable error.
What to Do:
- If 14 days have passed already, remove the sensor and start a new sensor.
- If this message appears before the 14-day wear period ends, claim a replacement sensor through Abbott’s support.
3. Readings That Don’t Match Symptoms
If your glucose readings don’t align with how you feel or your symptoms:
- Perform a fingerstick test to confirm your blood glucose levels.
- Cross-check the FreeStyle Libre 3 readings with a traditional blood glucose meter.
When to Seek Help:
If discrepancies persist, depending on the issue, consult Abbott’s customer support or your healthcare specialist.
Did you know?
Freestyle Libre 3 Plus Sensor is the same size as Freestyle Libre 3, offering 15 days of life and compatibility with some of the latest AID (automatic insulin delivery) systems.
Common CGM Accuracy Issues and Solutions
Many people are side sleepers and wear sensors on the same side. When pressure is applied to the CGM sensors, they tend to provide incorrect readings due to the compression. This needs to be taken care of, you may try changing the side of the sensor or simply change the side you sleep.
Moreover, loose sensors may fail to provide accurate readings or fall off altogether. You may use hypoallergenic and waterproof CGM patches to keep your CGM sensor intact and in place during physical activities, including swimming.
Is Your Faulty CGM Still Not Working Right?
No worries! If your sensor is faulty or inaccurate, don’t throw it away. Abbott offers free sensor replacements at no extra cost. Complete a Freestyle Libre sensor support request form to claim your new sensor delivered to your doorstep. Here is the link; https://www.freestyle.abbott/us-en/support/sensorsupportrequest.html
Extra Value Tip
Log in to LibreView using the same credentials as your phone app. It provides insights such as:
- A1c trends.
- Mealtime patterns.
- Daily glucose variations and trouble spots where the sensor struggled to capture data.
Share Your Data
With the Libre LinkUp app, users can share real-time glucose data with family or healthcare providers. This feature also sends alerts for high or low readings, ensuring prompt action in emergencies. The picture below shows all the steps to share your data on Freestyle Libre 3 sensors. You may follow the same steps to share data on Libre 2 and Libre 2 Plus as well.
Conclusion
While the FreeStyle Libre 3 sensor boasts high accuracy, occasional Freestyle Libre 3 accuracy problems may arise due to initial sensor adjustment, user error, or faulty hardware. However, there are troubleshooting steps you may follow to get rid of these errors, and in case they persist, you may always fill out a form to claim your new sensor. The link to the Freestyle Libre Sensor Support Request form has been provided above.
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