The Dexcom site fell out during today's tennis practice, despite a couple of "rescue" tegaderms. The Libre is still hanging on but did also get its additional tegaderm after seven days as the upper edge was beginning to peel a bit. No irritation whatsoever at the Libre site, our usual tolerable slight itch at the Dexcom site after a week (the Dexcom sits on a tegaderm since Max is a bit reactive to the Dexcom's adhesive).
It might be a few days before I have the time to analyze the data and summarize my thoughts. Meanwhile, here is what both sensors thought of the week.
According to the Libre, the worst period is around midnight, according to the Dex it is around 13:00. It's not incorrect, except for the fact that we want to be around 70mg/dl at 00:00 since we almost always start climb after 2:00. The noon period is a bit more problematic, and not intended: the school schedules introduces hard constraints on our ability to pre-bolus and time the noon meals.
As expected after the first day, the Libre kept running a bit higher (+13 md/dl), on average, than the Dex. We had previously noticed that the Dexcom was also running below our BG meter by 6-7 mg/dl over long periods.
I'll get back with the full analysis some time next week. Meanwhile, have a nice week-end!