From the Guidelines
The FreeStyle Libre 3 sensor should be changed every 14 days (2 weeks). When the 14-day period ends, the sensor will automatically stop working and will need to be replaced with a new one. The sensor is designed to be worn continuously during this period, including while showering, swimming, or exercising. It's essential to follow the manufacturer's instructions when applying a new sensor, which involves cleaning the application site (typically the back of the upper arm) with alcohol and allowing it to dry completely before application. After applying a new sensor, you'll need to wait approximately 1 hour for it to warm up before it begins providing glucose readings.
Key Points to Consider
- The 14-day wear period maximizes the sensor's accuracy and reliability while minimizing skin irritation that could occur from longer wear times.
- The sensor contains a small filament that sits just under the skin to continuously measure glucose in the interstitial fluid, and this component is designed to function optimally for exactly 14 days, as indicated by the FDA approval and studies such as 1.
- The use of intermittently scanned continuous glucose monitors, like the FreeStyle Libre 3, can be considered as a substitute for self-monitoring of blood glucose (SMBG) in adults with diabetes requiring frequent glucose testing, according to the 2019 American Diabetes Association standards of medical care in diabetes 1.
- The FreeStyle Libre 3 sensor does not require calibration with SMBG and its accuracy is not affected by acetaminophen, making it a convenient option for glucose monitoring 1.
From the Research
Libre 3 Sensor Replacement
- The Libre 3 sensor is a continuous glucose monitoring system that measures blood glucose levels in subcutaneous tissue 2.
- However, there is no specific information available in the provided studies on how often to change the Libre 3 sensor.
- The studies focus on the accuracy and performance of continuous glucose monitoring systems, including the FreeStyle Libre Pro 2, and the development of new sensor technologies 3.
- The replacement frequency of the Libre 3 sensor may depend on various factors, such as the manufacturer's recommendations, individual patient needs, and the specific device being used.
- It is recommended to consult the manufacturer's guidelines or a healthcare professional for advice on replacing the Libre 3 sensor.
Continuous Glucose Monitoring Systems
- Continuous glucose monitoring systems, like the Libre 3, have been recognized as ideal monitoring systems for glycemic control of diabetic patients 4.
- These systems measure blood glucose levels in subcutaneous tissue and allow users to make adjustments to their medical interventions 4.
- The development of new sensor technologies and non-invasive monitoring systems is ongoing, with the goal of improving the accuracy and convenience of glucose monitoring [(4,5)].