Dexcom time lag, and interstitial fluid glucose vs BG

[Michel]

This topic was split from:

How your Dexcom CGM reacts to calibration input

When you enter a calibration value into your Dexcom receiving device, your Dexcom data does not automatically line up on the new value. [DexcomOngoingCalibrationScreen_2017-10-07] it is easy to understand why. The measurements from a manual glucose monitor are only specified to be accurate with +/- 20% – an awfully poor expectation, but seemingly the only one that allows a reasonable cost for the strips used to read a BG value. On the other hand, your Dexcom, over time, averages out many cali…