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John uses
his phone
to check his
glucose levels

About CGM
What is continuous glucose monitoring?

Continuous glucose monitoring enables you to continuously monitor your glucose levels, allowing you to track trends and patterns. It requires a glucose sensor and a transmitter that measures your interstitial glucose levels every 5 minutes, meaning you’ll receive 288 readings every day, compared to approximately 6 to 10 readings when you use a traditional finger-prick, blood glucose monitor. The good news is, you don’t need to prick your fingers more than what you’re used to, but get so much more information.

What is even more important is that the Guardian Connect system helps you to see trends in your glucose levels. The system lets you see your glucose values, as well as whether your levels are going up or down. That way, you can begin to anticipate hypos and hypers. You can also customise predictive alerts for hypos or hypers so that you have a chance to react before it occurs. With a regular blood glucose monitor you might think everything is okay when you see 6 mmol/l (108 mg/dl) on your display. But if your blood glucose drops really fast you can have a hypoglycaemia in just minutes after the check. Medtronic Guardian Connect is the ultimate tool to help you continually monitor your sensor.

Components of continuous glucose monitoring

How does continuous glucose monitoring work?

Medtronic continuous glucose monitoring system works with a sensor that you change every 6 days and a transmitter that lasts a whole year.

Medtronic Enlite sensor is composed of a thin flexible electrode that is inserted just under your skin. Once the sensor is inserted you will no longer feel it. The electrode is constantly in contact with your interstitial fluid. A chemical reaction between glucose and the material of the electrode enables the sensor to measure your glucose levels continuously. A small transmitter device connected to the sensor transmits this information to your mobile phone via Bluetooth in the case of Guardian Connect.

The sensor measures your glucose in the interstitial fluid rather than directly in your blood stream, there is  a small physiological delay of approximately seven minutes for the glucose to travel from the blood to your interstitial fluid. It is therefore to be expected that at a given time, your blood glucose fingerprick reading and your Guardian Connect reading would be different.

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