TABLE 1.

Comparison of Selected CGM Systems (24,32,37)

System TypeBrand NameWear TimeWarm-Up TimeCalibrationFrequency of Glucose ReadingsAccuracy (MARD)Software and/or Device Compatibility
Professional CGMFreestyle Libre Pro systemUp to 14 days1 hourNoneEvery 15 minutes12.3%Data scanned from sensor using Freestyle Libre Pro reader in office
Medtronic iPro 2 Enlite CGM sensor and iPro2 digital recorderUp to 6 days1 hourNone, but at least one blood glucose entry every 12 hours is required for system uploadsEvery 5 minutes13.6%Data uploaded from sensor recorder using Medtronic CareLink iPro website
Dexcom G4 Platinum Professional Continuous Monitoring System7 days2 hoursEvery 12 hours after the 2-hour start-up calibrationEvery 5 minutes13.3%Data uploaded from sensor using Dexcom STUDIO software
Personal CGMFreestyle Libre systemUp to 14 days1 hourNoneAvailable every minute; automatically records every 15 minutes9.4%Data may be uploaded from reader in health care provider’s office using Freestyle Libre View software
Dexcom Platinum G4/G5 sensor with G4 Platinum transmitterUp to 7 days2 hoursEvery 12 hoursEvery 5 minutes9% when used with most current Dexcom softwareStand alone with Dexcom G4 receiver and compatible with Animas Vibe and Tandem t:slim insulin pumps
Dexcom Platinum G4/G5 sensor with G5 Platinum transmitterUp to 7 days2 hoursEvery 12 hoursEvery 5 minutes9% when used with most current Dexcom softwareStand alone with Dexcom G5 receiver, web-based Clarity software (G5 only), and most Apple and Android products and compatible with Tandem t:slim X2 insulin pump
Dexcom G6 sensor and transmitterUp to 10 days2 hoursNoneEvery 5 minutes9.8% overall and 9.6% in children 6–17 years of ageStand alone with most Dexcom G5 receivers and G6 receiver and most Apple and Android products; both G5 and G6 download to web-based Clarity software
Medtronic Enlite Sensor and MiniLink or Guardian Link transmitterUp to 6 days2 hoursEvery 12 hoursEvery 5 minutes13.6%Compatible with Medtronic 530G and 630G insulin pumps
Medtronic Guardian Sensor 3 sensor and Guardian Link 3 transmitterUp to 7 days2 hoursEvery 12 hoursEvery 5 minutes10.6% with 2 calibrations/day; 9.6% with 3–4 calibrations/dayCompatible with Medtronic 670G hybrid closed-loop insulin pump system