Last night was one of those ??WTF?? nights. Here's how it went:
We were at Cub Scouts at 6:30, and as always, it was mayhem. Eric was running around with all the older boys having a ball, but as usual, his BG took a nose dive after only about 15 minutes. And as usual, I had come prepared, and gave him a juicebox as soon as I saw the double-down arrows on his CGM. Because there was still more running even after the juicebox, when snacktime rolled around (and his CGM was still showing a slide), he had not one but TWO cookies and a cup of juice, and I gave him the juice carbs as freebies. At bedtime an hour after we got home, he was at 96, so I figured I'd been right not to cover the juice. But by 10:30, his CGM showed a steep upward trajectory, and I thought, well, maybe I should've covered him after all. Tested, found him at 286 — yikes! — and corrected.
Midnight rolled around, and I checked his CGM to assure myself that his correction had done its job. But no; the CGM still showed him in the stratosphere. Well, CGM isn't always right, so I took a BG, but it too showed him to be exceedingly high — 389. The correction, obviously, had failed to go in (although somewhat to my surprise, he had no ketones.) So this time, I corrected with a syringe, figuring if there were no ketones, he must be getting SOME insulin through the site, so I could rely on the syringe correction to bring him back down and start a new site in the morning.
Here's where it gets weird. At 3:30, I was awakened by the CGM alarm. Looking at the graph, I found he was *still* up near 400 — the dose I'd given him at midnight hadn't done a thing. The insulin vial was still well within its lifetime — I had opened it February 9th. Why hadn't the correction worked? I calculated out another correction bolus and again delivered it by syringe. And this time, I stayed up to watch the results. Sure enough, within half an hour, I started to see a downward line on his CGM. By 6:00, his CGM had him at 250. By 7:15, he was at 188.
I can't for the life of me figure out what that was all about. I can only imagine two possibilities: one, he was either so insulin resistant from the combination of night-time hormones + high BG that my first correction wasn't enough to override it, or two, somehow, I didn't get the insulin into him when I corrected at midnight. Maybe I didn't get the needle into his skin, or maybe I pulled it out too quickly and the insulin didn't go subQ. It's a puzzle. Guess I'll have to chalk it up to experience.