Dexcom's G4 Platinum CGMS (Continued)

Our CGM Wish List

1. More insulin pumps with CGM integration: This is hopefully coming within the next year with the Animas Vibe/Dexcom G4 pump. A G4 integrated Insulet OmniPod is also in development, and Tandem is currently evaluating the feasibility of integrating the G4 into the new t:slim pump. Medtronic's new MiniMed 530G pump will be integrated with the Enlite CGM sensor and is expected to be approved in the first half of 2013.

2. A pediatric indication: Dexcom is finishing up a clinical trial to support use of the G4 Platinum in younger patients. Medtronic's Real-Time Revel/Guardian is the only CGM currently available in the U.S. with a pediatric indication.

3. A longer wear indication beyond seven days: Dexcom is evaluating what trials are needed to support FDA-approved use of the G4 Platinum for longer than seven days (note: many patients, including us, wear sensors for longer than seven days).

4. Automatic upload of CGM data to the cloud and remote monitoring: This is hopefully coming with Dexcom's Gen 5, the smartphone compatible CGM.

5. Even less painful: Though we found the G4 Platinum to be slightly less painful than the Seven Plus, those who are very pain sensitive will still likely find sensor insertion bothersome. Dexcom is developing a new applicator for the Gen 5 sensor, and we look for this to reduce insertion pain.

6. Percent "time in range" on the home screen: We hope that the FDA recognizes the value of this metric, and we expect to see this in future generations of CGM.

7. Predictive alerts that forecast blood glucose minutes or even hours ahead of time: Dexcom is actively developing an algorithm to increase the warning time for hypoglycemia.

8. Fewer required sensor calibrations (or ideally no required calibrations): Dexcom is actively pursuing both areas of research.



G4 Platinum

Seven Plus

Average Percent Error vs. Blood Glucose (Overall)*



Average Percent Error vs. Blood Glucose in Hypoglycemia (<70 mg/dl)*



Receiver/Transmitter Communication Range

20 feet

5 feet

Receiver Size

4 in x 1.8 in x 0.5 in
2.4 ounces

4.5 in x 2.3 in x 0.85 in
3.5 ounces

Receiver Data Capture Rate



Sensors Lasting Seven Days



FDA Approved Length of Wear

7 Days

7 Days

Calibration Schedule

Two at startup, one every 12 hours thereafter. Any FDA approved glucose meter can be used.

Two at startup, one every 12 hours thereafter. Any FDA approved glucose meter can be used.

Battery Life/Charge Time

3-5 days on a 3-hour charge (wall outlet)

3 days on a 3-hour charge (wall outlet)

Charging Cable


Proprietary Dexcom cable

Typical Price of Starter Kit/Sensor Four-Pack




* A lower value represents better accuracy. This metric, known as the mean absolute relative difference (MARD), pairs CGM values with blood glucose values and calculates the percent error at each time point. The percent errors are then averaged to obtain the MARD.

This article is published on dLife thanks to diaTribe (, an independent, advertising-free e-newsletter for everyone eager to learn about the latest advances in diabetes management. diaTribe is your inside track on diabetes research and products — sign up here for your complimentary lifetime subscription!

NOTE: This information is not intended to be a replacement or substitute for consultation with a qualified medical professional or for professional advice related to diabetes or another medical condition. Please contact your physician or medical professional with any questions and concerns about your medical condition.


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Last Modified Date: June 14, 2013

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