How to Calibrate Dexcom G7: I Step-By-Step Guide
When evaluating the accuracy of continuous glucose monitors (CGMs), comparing their readings with those from blood glucose meters (BGMs) can help reduce the differences between the values they provide. The accuracy of CGMs is typically assessed using a metric called MARD (mean absolute relative difference), which compares CGM readings with BGM results.
Since BGMs measure glucose from blood and CGMs measure it from interstitial fluid, discrepancies between the two are expected. According to the FDA, CGM systems are considered reliable when their MARD is 10% or less. In this article, we address the question, “How to Calibrate Dexcom G7?” and provide an overview of the sensor’s features.
Can I calibrate Dexcom G7?
Dexcom G7 sensors do not require calibration. If necessary, you can log a BG meter value in the Dexcom G7 reader or app as an event. Additionally, the value from a blood glucose meter can be used to calibrate either the receiver or the app.
To log a value from a Blood Glucose meter or use it as a calibration within the G7 app:
- Go to your Clarity Dashboard (download from the App Store if you don’t have it already).
- Tap + (On the top right corner) in the Glucose or History tabs.
- A new ‘Add Event’ menu shall pop up. Select ‘Blood Glucose’
- Now select ‘Use as Calibration’.
- Put your Blood Glucose Meter value (should be a fresh fingerstick test result, i.e., 5 mins old max).
To enter a BG meter value on the receiver, follow these instructions:
- >receiver > Menu > Event > Blood Glucose.
- Choose the option to Log Blood Glucose and then select “Use as Calibration.“
- Follow onscreen instructions.
Calibration should only be done on one device, whether you use the app or the receiver. The sensor sends calibration information between them.
Have you still not switched to CGM?
CGM’s not only help you with continuous glucose monitoring, they provide you with your glucose trends, high and low sugar alerts to save you from adverse events (Dexcom can give an alarm for Urgent low 20 minutes before the hypoglycemic event. Check your eligibility to claim a CGM today.
Dexcom G7 is a continuous glucose monitor (CGM) that not only measures your glucose values, but also offers integration with numerous automatic insulin delivery (AID) systems in the US market. Older CGMs by Dexcom used to have separate transmitters, a small device attached to your sensor for transmitting data to your compatible smartphone or the reader.
On the contrary, the G7 sensor comes with a built-in transmitter and lasts for up to 12 days and 12 grace hours. This G7 has an amazing 30 minutes warm up time, has an option of ‘direct to watch’ (allowing you to attach it directly to your Apple watch without needing to connect it with a phone), and to make it suitable for people with active lifestyle; the Dexcom G7 sensor is made water proof, you can submerge it in up to 8 feet water for up to 12 hours. G7 sensors have been indicated for 2 years or older living with type 1, type 2, or gestational diabetes.
Conclusion:
This blog gives a step wise guidance on how to calibrate Dexcom G7, explains what is calibration and what is the unit of measuring a CGM accuracy, along with a good accuracy value indicated by the FDA.
Disclaimer: This blog is only for informational purposes. Always consult a doctor before taking any medical action.
