Monitoring blood sugar levels is an important part of life for people with diabetes. Accurate and reliable measurements help prevent acute complications, adjust treatment, and maintain an active lifestyle. Modern technologies such as Dexcom G7 and FreeStyle Libre provide continuous glucose monitoring, which significantly simplifies the self-management process.
Steps for Achieving Maximum Accuracy
To achieve the highest accuracy when measuring blood sugar levels with Dexcom G7 and FreeStyle Libre, you need to follow a few key recommendations. These measures significantly reduce measurement error, which is crucial for effective glucose management and making the right treatment decisions. It is important to consider all aspects of using these devices.
Preparing and Applying Sensors
Carefully prepare the skin before applying the sensor. To do this, wash and dry the area where it will be applied. Use an alcohol wipe to clean the skin. Avoid applying the sensor to irritated or damaged skin.
Ensure that the FreeStyle Free or Dexcom G7 sensor is properly applied and fits snugly against the skin. Use a reader or smartphone to activate the sensor and retrieve data.
Daily Use and Monitoring
To read information from the Dexcom G7, regularly check the data on your smartphone or device to monitor changes in your glucose levels. The Dexcom G7 does not require regular calibration. If you’re using FreeStyle Libre, scan it at least once every 8 hours to get continuous data.
Replacing Sensors
Sensors have a limited lifespan, after which their accuracy decreases. This is due to the accumulation of contaminants on the device’s surface, changes in its adhesive properties, and natural wear and tear of its components. Regularly replacing the sensor ensures that the device provides accurate data, which is especially important for making the right decisions in diabetes management.
The Dexcom G7 sensor must be replaced every 10 days. The manufacturer recommends following this replacement schedule to ensure a consistent supply of accurate data. FreeStyle Libre sensors also have a limited lifespan: they should be replaced every 14 days.
Quality and Accuracy Control
Periodically compare the readings from the Dexcom G7 and FreeStyle Libre with the results from a traditional blood glucose meter. It is especially important to do this if you notice a change in how you feel or suspect that the data may be inaccurate. For example, if you’re experiencing symptoms of hypoglycemia or hyperglycemia but the device shows normal readings, check your blood sugar with a blood glucose meter to confirm.
Device Care
Proper care of the measuring components is an important aspect of ensuring their accuracy. Following the care recommendations minimizes the risk of device damage and extends their service life. Here are the main recommendations for caring for the sensors:
- Keep the sensors within the recommended temperature range;
- avoid direct sunlight and extreme cold to prevent data distortion;
- protect them from impacts and pressure, especially during sports or vigorous physical activity;
- use only new sensors to ensure measurement accuracy;
- periodically check performance using control solutions, if provided by the manufacturer.
Managing diabetes is a complex process that requires attention to detail and constant self-monitoring. The innovative Dexcom G7 and FreeStyle Libre technologies, combined with a proper approach to using the devices, improve the effectiveness of managing the patient’s condition.


