Reusable CGM sensors – Safe or Unsafe

Although this blog is about reusable CGM sensors and most people living with diabetes already know about Continuous Glucose Monitors (CGMs). Just a quick recap on CGM systems for those who might not be aware of the CGM technology.

CGM systems provide you with continuous glucose monitoring without the need for repeated finger pricks. These systems have significantly helped people get more control over their glucose levels with less effort. The top CGM manufacturers include but are not limited to Dexcom and Abbott.

How long can I wear a CGM sensor:

CGM sensors offer different life spans. If you are wearing a sensor that has a life of up to 14 days, you can wear it for up to 14 days, except when you are feeling any irritation around or just under the sensor. In such cases remove the sensor and contact your healthcare specialist.

When to remove the Sensor:

• If the Sensor is becoming loose or if the Sensor tip is coming out of your skin, you may get no readings or unreliable readings, which may not match how you feel. Check to make sure your Sensor has not come loose. If it has come loose, remove it and apply a new one.
• If you believe your glucose readings are not correct or are inconsistent with how you feel, perform a blood glucose test on your finger to confirm your glucose. If the problem continues, remove the current Sensor and apply a new one.
• When applying a new sensor, try changing the sensor site to avoid any discomfort.

Important

When applying a new sensor, make sure you follow the proper instructions, such as cleaning and drying the site and avoiding places with moles or lumps. In case the sensor breaks or causes irritation, please contact your healthcare specialist.

Conclusion

While many of you would be in search of reusable CGM sensors, reusing a CGM sensor is not recommended. Reusing a CGM sensor may result in incorrect readings and infections as well. Each CGM sensor is designed with a specific lifespan in mind—for instance, the Libre 3 sensor can last up to 14 days, while the Dexcom G7 typically lasts 10 days, with a 12-hour grace period. It’s important to adhere to these timeframes for optimal performance. Change the sensor before time If it becomes loose, malfunctions, or irritates.

At the time of applying a new sensor, change the application site to avoid any discomfort or irritations.