What is the continuous glucose monitoring system (CGMS)?

William Lee Dubois
Endocrinology Diabetes & Metabolism

CGM is a high-tech system for monitoring your blood sugar. The system is made up of three parts: a sensor that slips under your skin (don’t freak out on me, it’s not painful); a transmitter; and a monitor.

The system samples every five minutes, giving you a near continuous look at the changes in blood sugar. Alarms can warn you it you are in danger, either high or low, and if your blood sugar is changing rapidly.

It’s very cool.

Beyond moment-to-moment safety, a CGM system will let you study in great detail how your body responds to various foods and how well your diabetes medication is doing in controlling your blood sugar.

Continue Learning about Diabetes


Diabetes mellitus (MEL-ih-tus), often referred to as diabetes, is characterized by high blood glucose (sugar) levels that result from the body’s inability to produce enough insulin and/or effectively utilize the insulin. Diabetes ...

is a serious, life-long condition and the sixth leading cause of death in the United States. Diabetes is a disorder of metabolism (the body's way of digesting food and converting it into energy). There are three forms of diabetes. Type 1 diabetes is an autoimmune disease that accounts for five- to 10-percent of all diagnosed cases of diabetes. Type 2 diabetes may account for 90- to 95-percent of all diagnosed cases. The third type of diabetes occurs in pregnancy and is referred to as gestational diabetes. Left untreated, gestational diabetes can cause health issues for pregnant women and their babies. People with diabetes can take preventive steps to control this disease and decrease the risk of further complications.

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