What is Continuous Glucose Monitoring

More insight for better glucose control

You are here

24/7 Glucose Monitoring

Continuous Glucose Monitoring (CGM) assists in an individual's glucose management by providing continuous insight into a person's glucose levels. CGM is currently the only diabetes management tool shown to help patients reduce their A1C while also reducing hypoglycemia.1,2

A CGM system contains three basic components:

  • Sensor - measures interstitial glucose levels just underneath the skin
  • Transmitter - this component sends data wirelessly to a display device
  • Display Device - patient views their glucose data and trends here


Take a closer look at the Dexcom G6® Continuous Glucose Monitoring (CGM) System

A Closer Look at Dexcom G6

More Insight Than Using a Meter Alone

Unlike a blood glucose meter (BGM), which gives just a single glucose reading, CGM systems provide real-time, dynamic information about the user's glucose up to – 288 readings – in a 24-hour period. Patients gain valuable insight about their glucose number, speed and direction, giving them additional insight to proactively manage their diabetes.

The Benefits of CGM

A1C Reduction

RT-CGM has proven to be the best outpatient glycemic management system for reducing A1C. Patients with type 1 diabetes experience an average reduction of 1.3%*3 and 1.2%†4 in type 2 patients.

Reduced Hypoglycemia

Hypoglycemia presents a significant risk to the health and safety of your patients. Not only can CGM use reduce A1C, numerous studies have shown it can also decrease time spent in hypoglycemia.1-3

Active Monitoring at Night

CGM systems are equipped with alerts that can warn users of approaching lows and highs. These warnings can provide an added layer of protection, giving your patients more peace of mind.

*MDI patients with baseline A1C ≥ 8.5%

Observational study; non-prandial insulin-using patients using CGM at least 85% of recommended days. 

1Juvenile Diabetes Research Foundation Continuous Glucose Monitoring Study Group. Continuous Glucose Monitoring and Intensive Treatment of Type 1 Diabetes, N Engl J Med. 2008: 359(14); 1464-1476.

2Šoupal 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.

3Beck RW, Riddlesworth T, Ruedy K, et al. Effect of continuous glucose monitoring on glycemic control in adults with type 1 diabetes using insulin injections: The diamond randomized clinical trial. JAMA. 2017;317(4):371-378. doi:10.1001/jama.2016.19975.

4Ehrhardt NM, Chellappa M. The Effect of Real-Time Continuous Glucose Monitoring on Glycemic Control in Patients with Type 2 Diabetes Mellitus J Diabetes Sci Technol 2011;5(3):668-675.

Contact Dexcom

If you are a clinician and want to learn more about Dexcom’s Continuous Glucose Monitoring Systems, please fill out the form and a Dexcom representative will contact you.

If you are a Dexcom User or Patient, please contact Dexcom here.

The information you provide will be sent securely and subject to the Dexcom Terms of Use and Privacy Policy.