Seven facts you need to know about continuous glucose monitors.

This article reviews seven facets of continuous glucose monitors (CGMs): how they work, advantages for patients and clinicians, device limitations, effect on outcomes in patients with diabetes, who should be prescribed these devices, their cost, and their accuracy. Four major CGMs marketed today are compared: Abbott's FreeStyle Libre, Medtronic's Guardian, Dexcom's G6, and Senseonic's Eversense.