Continuous Glucose Monitoring Sensor Replacement Guidelines

Sensor Wear Duration and Replacement

Dexcom continuous glucose monitoring (CGM) sensors should be changed every 7-10 days, depending on the specific model being used, as recommended by the American Diabetes Association 1, 2
The Current Dexcom G6 has a 10-day wear period 2
The Dexcom G7 also has a 10-day wear period, as stated by the American Association of Clinical Endocrinologists 3

Regular sensor changes are essential for maintaining accuracy and reliability of glucose readings, with the American Diabetes Association emphasizing the importance of timely replacements 3, 4
Sensor performance can be affected by several factors, including skin irritation or allergic reactions at the insertion site, as noted by the Endocrine Society 3

Patients should not allow gaps in CGM coverage to ensure continuous monitoring and optimal diabetes management, as advised by the American Association of Clinical Endocrinologists 3
When changing sensors, it's advisable to insert the new sensor before removing the old one to avoid gaps in data collection, following the manufacturer's instructions for proper insertion technique, as recommended by the International Society for Pediatric and Adolescent Diabetes 1, 3

Extending sensor wear beyond the manufacturer-recommended period may lead to decreased accuracy of glucose readings, as warned by the American Diabetes Association 4
Calibration requirements vary by model, with newer Dexcom models (G6, G7) being factory-calibrated and generally not requiring fingerstick calibrations for treatment decisions, as stated by the American Association of Clinical Endocrinologists 3, 5
For optimal benefit, CGM devices should be worn as consistently as possible, with minimal interruptions, as recommended by the Endocrine Society 3, 4