AM Basal testing today has shown me how consistently my Dexcom G5 is running 40 points low. I had incorrectly assumed when I saw big spreads between fingersticks and Dexcom that it was lagging. This would also explain (at least to some extent) why my A1C came back 0.5% higher than I thought it would last week.
My sensor is on Day 1 of the second week (restarted it last night c/o the Faraday bag). But I’ve noticed this 40 point spread for a few weeks now, on other unexpired sensors. I will have to check the manufacture date of the transmitter tonight, but it has 3 weeks of battery life left on it. I do have two spare transmitters…so I’m wondering if the relative (presumed) age of the transmitter could lead to this consistent spread?
I went out and bought a Contour Next meter and strips today to compare to the Dexcom and my Freestyle strips. Contour read higher than Freestyle which read higher than Dexcom.
What would you change? Sensor? Transmitter? Just let it ride and see what it does?