Page 129 - Glucose Monitoring Devices

130 CHAPTER 6 CGM sensor technology

below 80 mg/dL. Thus the higher the percentage, the more agreement there is
between the CGM and reference blood draw measurements. The systems also
vary on whether they have been approved yet for treatment decisions such as dosing
insulin. The Dexcom and Libre systems are approved for making treatment deci-
sions without a confirmatory fingerstick blood glucose reading. The Eversense
and Guardian system need two calibration updates per day, and Dexcom and Libre
systems do not require calibration. As discussed in the transducer technology
section, the method used in the conversion of glucose can leave it susceptible to
interferents. Each of the interferents that they systems have been labeled against
is listed in the figure as well. The capabilities of each of the systems with respect
to active or automatic alerts, remote monitoring, and the capability for on-body
vibration are also shown in Fig. 6.8.
These products and sensor technology provide the current basis for CGM
systems for people with diabetes.

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