An introduction to Continuous Glucose Monitoring – AMSL Diabetes

An introduction to Continuous Glucose Monitoring


Continuous Glucose Monitoring (CGM) is a system which measures glucose levels continuously in order to monitor levels and allows the user to detect potential patterns throughout the day and night.

Unlike fingerprick tests, which provide a measurement for a single point in time, CGM provides dynamic glucose information by depicting trends and suggesting where one’s glucose levels may be heading. By using CGM, one could notice and respond to falling glucose levels before hypoglycaemia or monitor patterns while asleep. Studies show that CGM use provides significant improvement of HbA1c1 levels and in lowering the risk of hypoglycaemia.1,2 


About Dexcom CGM :

Dexcom CGM systems are inserted and worn on the skin. A small wire sensor is inserted under the skin with the aid of an insertion device. The sensor continuously reads glucose levels in the tissue. It is held in place with adhesive, so it remains in place for 7 days of wear.

The transmitter clips into the plastic sensor pod which is attached to the sensor. This transmits the glucose readings via Bluetooth to a Dexcom receiver which displays a dynamic trend line, updated every 5 minutes.

In the case of the Dexcom G5 Mobile CGM system, this receiver can be a compatible smart device* so that there is freedom to view the glucose levels quickly and conveniently, without the need to follow up with a finger prick test. **


In addition, Dexcom G5 Mobile has a ‘Share’ feature, allowing up to 5 accounts to receive data and alerts. This offers peace of mind for parents or loved ones who are then able to monitor the user’s glucose levels from anywhere.

The Dexcom G4 PLATINUM sensor transmits to a sleek, colour screen receiver, which can be customised to alert when glucose levels are high, low, or to best suit the user’s needs.

AMSL distribute both Dexcom G5 Mobile and Dexcom G4 PLATINUM systems.

Both Dexcom CGM systems are available under the CGM Subsidy Initiative.  For those who are not eligible for the CGM Subsidy, the Dexcom Order Form with pricing can be found here.

*The Dexcom G5 Mobile CGM transmitter can only be paired with one medical device (either a Dexcom receiver or the t:slim X2 Insulin Pump) and one compatible mobile device (phone or tablet) at the same time. To view a list of compatible smart devices, see here.
** If your glucose alerts and readings do not match your symptoms or expectations, you should confirm reading with a finger prick test. Calibration finger prick tests are required every 12 hours for CGM accuracy.
Always read the label and use only as directed. Your doctor will advise you whether this product is suitable for you.
1. Šoupal J, Petruželková L, Flekač M et al. Comparison of Different Treatment Modalities for Type 1 Diabetes, Including Sensor-Augmented Insulin Regimens, in 52 Weeks of Follow-Up: A COMISAIR Study. Diabetes Technol Ther. 2016;18(9):532-538. doi:10.1089/dia.2016.0171 2. Welsh J, Gao P, Derdzinski M et al. Accuracy, Utilization, and Effectiveness Comparisons of Different Continuous Glucose Monitoring Systems. Diabetes Technol Ther. 2019;21(3):128-132. doi:10.1089/dia.2018.0374
Dexcom, Dexcom G5, Dexcom G4, Dexcom Share, and Dexcom CLARITY are registered trademarks of Dexcom, Inc. in the United States and/or other countries.

An introduction to Continuous Glucose Monitoring

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