Using CGM for Insulin Dosing

[Michel]

@dave

the G5 doesn’t ever stray far from meter readings.

Welcome, @dave!

We love our Dexcom, and we dose from it too! But I have posted and documented several patterns on this forum where you can see the G5 is way off, in particular in transitions. One example:

When CGMs lie, and when a deep low is really a nice landing

I have mentioned several times in passing that I think many Dexcom lows, when they come off a steep slope, aren’t really lows. Today I decided to prove it. My son calibrated his CGM this morning at 8:37 AM and was off by 2: his Dexcom has been very accurate for the past two days (so we can assume that, when stable, his CGM accurately reflects his real BG). Later this morning, he had a major puberty peak that took him to about 250. He injected large quantities of insulin and came down quickly. W…