From the Guidelines
The Dexcom G7 sensor should be replaced every 7-10 days.
Replacement Frequency
- The replacement frequency of the Dexcom G7 sensor is dependent on the manufacturer's guidelines and individual patient needs.
- According to a scoping review published in the International Journal of Behavioral Nutrition and Physical Activity 1, the Dexcom sensor wear duration ranges from 7-10 days.
- This duration is specific to the Dexcom manufacturer and may vary from other continuous glucose monitoring (CGM) systems, such as Medtronic (2-10 days) and Abbott (10-14 days).
- It is essential to follow the recommended replacement frequency to ensure accurate glucose readings and optimal device performance.
- The total number of CGM wear days can range from 2-252 days per intervention, with a median of 28 days 1.
From the Research
Replacement Frequency of Dexcom G7 Sensor
The Dexcom G7 Continuous Glucose Monitoring System is designed to be worn for a specific period. According to the study 2, the sensor was evaluated for 10.5 days of use in adults with diabetes.
- The study found that the sensor provided accurate glucose readings with single-digit mean absolute relative difference (MARD) with arm or abdomen placement in adults with diabetes.
- However, the study does not explicitly state the recommended replacement frequency for the sensor.
- Other studies, such as 3, 4, and 5, evaluated the performance of previous-generation Dexcom sensors, which were designed to be worn for 7 days.
Sensor Life and Performance
The performance of the Dexcom G7 sensor was compared to other continuous glucose monitoring systems in study 6.
- The study found that the FreeStyle Libre 3 sensor was more accurate than the Dexcom G7 sensor in all metrics evaluated throughout the study period.
- However, the study does not provide information on the replacement frequency of the Dexcom G7 sensor.
Recommendations
Based on the available evidence, it appears that the Dexcom G7 sensor is designed to be worn for 10-14 days, but the exact replacement frequency is not explicitly stated in the studies 2, 3, 6, 4, 5.