Just started a new sensor this evening and noticed something odd. I took my 2 initial BG values with my meter and they were 86 and 89. I entered these two values, and the Dexcom started off with a reading of 83.
I thought the Dexcom didn't really measure numbers, but evaluated trends and adjusted from the calibration values. If that's so, why didn't it average the initial two readings and start somewhere between them?
I've noticed in the past that whenever I input a calibration value, it tends to adjust the number to reflect the calibration reading. For example if Dexcom is reading at 85 and I finger stick a reading of 95 and input the calibration value, it tends to adjust upwards to around 90.
Is this everyone else's experience and why would it be different for the initial calibration?
BTW - I'm on week 6 of the Dexcom and I don't think I would ever want to be without it again. I love the constant feedback and it's made a tremendous difference in my amount of control. :-)