Got my 1st Dexcom back in April, so I’m still sort of a newbie. Mostly it’s been tracking pretty close to fingerstick results. This morning though… not so much. Only the weird thing is that the CGM result makes a LOT more sense than the fingerstick one does.
So, I ride my bike to work. Biggest problem is managing the lows for this so I don’t arrive at work with a hypo to deal with. I actually run “Share” to my iPhone while riding. I have an iPhone holder on my handlebars and I can watch what my bg is doing in realtime–handy! So my BG (fingerstick) at departure time is 118. I can easily drop 30 pts from the ride, so just to be safe I started a temp basal to stop delivery for 30 minutes. By the time I got to work the CGM is showing 80, just about what I expect on previous experience, not bad, definitely feeling “low” but I know there’ll be a bounce-back and I’ll probably be in the 100 neighborhood soon enough. Get to my desk and do another fingerstick for the sanity-check… 144! Wha? Try again, just in case… 148.
Nothing out of the routine this a.m. food-wise, and if you’d asked me to guess my level without looking, 80u is about what I’d have said based on experience but also on sensation. I mean, I have to go with the glucometer, but I’m really surprised not just at how big the discrepancy is–the largest I’ve seen so far–but the odd thing is that it seems like the CGM has it right this time.
This has been another episode of “No Matter How Experienced You Are and How Much Sophisticated Gear You Have, T1 Is Always Weirder Than You Thought”