Table 1.

Comparison of select continuous glucose monitors

	Medtronic Guardian Sensor 3	Medtronic Guardian Sensor 4*	Senseonics Eversense	Dexcom G6	Abbott Freestyle Libre 2	Abbott Freestyle Libre 3
Sensor type	rtCGM	rtCGM	rtCGM	rtCGM	isCGM	rtCGM
Age of approval (years)	2+	7+	18+	2+	4+	4+
Subcutaneous or implanted	Subcutaneous	Subcutaneous	Surgically Implanted Transmitter adhered to skin over implanted sensor	Subcutaneous	Subcutaneous	Subcutaneous
Duration of wear (days)	7	7	Maximum 180	10	14	14
Calibration status	User calibration with blood glucose meter at least 2 × /day	Factory calibrated	User calibration with blood glucose meter 2 × /day	Factory calibrated	Factory calibrated	Factory calibrated
Approved for use for insulin dosing	No	Yes	Yes	Yes	Yes	Yes
Compatible in HCL system	MiniMed 670G, 770G	MiniMed 780G	No	Tandem t:slim X2 CIQ Omnipod 5 CamAPS** Diabeloop**	No	No

References for Table 1 information: [25•, 138–140]

rtCGM real-time continuous glucose monitor, isCGM intermittently scanned continuous glucose monitor, HCL hybrid closed loop, CIQ Control IQ

^*At the time of writing, CE marked in Europe but still under review for United States FDA approval

^**System not available in the USA