What Is a Continuous Glucose Monitor?

Guardian glucose monitor

Guardian glucose monitor

A continuous glucose monitor is a device that measures glucose levels continuously, 24 hours a day. The glucose monitor can help you understand how food, exercise, and medication impact your glucose levels, so you can better manage your diabetes. Many continuous glucose monitors also include alarms to indicate when your glucose levels are too high or too low.


The tiny glucose sensor is inserted under the skin. The transmitter transmits glucose readings to the monitor.

Depending on the type of monitor, a small glucose-sensing device (or sensor) is inserted just under the skin on your stomach. The sensor measures glucose levels every few seconds and sends the information via a wireless transmitter to a monitor that can be worn on your belt or in a pocket.

A continuous glucose monitor can help you become aware of your glucose levels and how they change based on food, exercise, and medication. Wearing a monitor could help you feel more confident about the way you are managing your diabetes.

Medtronic Diabetes’ Guardian® Real-Time Continuous Glucose Monitoring System can be used by type 1 and type 2 diabetes patients who desire better glucose control to improve their health and quality of their lives.


Information on this site should not be used as a substitute for talking with your doctor. Always talk with your doctor about diagnosis and treatment information.

Last updated: 22 Sep 2010

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