FreeStyle Libre 2 | FreeStyle Libre 3 | Dexcom G6 | Dexcom G7 | Medtronic Guardian 3 | Medtronic Guardian 4 | Eversense E3 | |
Insertion site | Arm | Arm | Abdomen | Abdomen or arm | Abdomen or arm | Abdomen or arm | Arm (implanted subcutaneously) |
Duration of sensor wear | 14 days | 14 days | 10 days | 10 days | 7 days | 7 days | 180 days |
Calibration required? | No | No | No | No | Yes, every 12 hours (3 to 4 times recommended)¶ | No | Yes, every 12 hours for the first 21 days of use, then once daily |
Warm-up time | 1 hour | 1 hour | 2 hours | 30 minutes | 2 hours | 2 hours | 24 hours |
Method of insertion | Self-insertion | Self-insertion | Self-insertion | Self-insertion | Self-insertion | Self-insertion | Requires office-based procedure |
Optional or customized alarms for glucose values | Low and high | Low and high | Predictive low and high, rate of change, low and high | Predictive low and high, rate of change, low and highΔ | Predictive low and high, rate of change, low and high | Predictive low and high, rate of change, low and high | Predictive low and high, rate of change, low and high |
Programmed/mandatory alarms for glucose values | None | Urgent low | Urgent low | Urgent low | Urgent low | Urgent low | Urgent low |
Insulin pump integration? | No | No | Tandem t:slim X2 and Omnipod 5 | No (in development) | Medtronic MiniMed 670G, 770G, 780G | Medtronic MiniMed 780G | No |
Share feature for health care providers◊ | LibreView | LibreView | Clarity | Clarity | CareLink | CareLink | Eversense Data Management System (DMS) Pro |
Intermittent scanning ("flash") or real-time? | Intermittent scanning | Real-time | Real-time | Real-time | Real-time | Real-time | Real-time |
CGM: continuous glucose monitoring.
* Listed devices are intended for personal use. Professional CGM devices (practice-owned) include the FreeStyle Libre Pro, the Dexcom G6 Pro, and the Medtronic iPro2.
¶ Fingerstick glucose measurements are also required to determine prandial insulin dosing.
Δ The Dexcom G7 has a "delay first alert" setting for high glucose. The alarm may be delayed until glucose remains elevated for a specified duration.
◊ All listed devices also have compatible smartphone apps that allow sharing of personal CGM data with followers (eg, family, friends, caregivers).Do you want to add Medilib to your home screen?