As some of you may recall I ordered a Dexcom G5 based on my endo repeatedly saying that the only way I could have an A1c in the 5s is if I was going hypo and that was probably occurring overnight. Well the G5 came this week and I started it up last night and did my initial calibration about 9pm. I went to bed soon afterwards but was awoken to an alarm. I apparently missed the low alert because the first thing I heard was the severe hypo alert (< 55 mg/dl). The dexcom said I was in the 40s.
I was tired, so I didn’t even bother to go downstairs and test, I just treated it and within a short time I was back up in the normal range and remain fine the rest of the night. I know I should have confirmed the low with my meter. My bad. But I also am not all that clear that I should trust the CGM in a run up period.
So the question is whether others have found the Dexcom to give “wonky” readings during that run up period in the first day or so. If not them I might end up hanging my and sheepishly walking into my endo’s office admitting that I have probably been having overnight hypos despite my failure to find any with my meter. What is your experience?