Now, getting back to a few of the topics which Ann DID ask for. Hereās my situation, and what I do to try and handle it.
I have many occasions of inexplicable rising bG, but I do not have occurrences of inexplicable fallingbG. All of my āunpredictableā drop-offs occur as follow-up to the inexplicable increases-- when my liver quits pumping excessive, unwanted, unneeded glucose.
There are days when I need 3x of my normal daily dose (unrelated to any food, illness, other drugs, activity, blah-blah, as Iāve explained in other posts). The challenge is to accept this fact, and keep cranking in the insulin, even though it doesnāt make sense. 5 units every half hour, from +2 hours after the first correction for a bG jump which happened totally unrelated to food intake.
When I do such a correction, Iāll do it big-- at 175 lbs, Iāll do 15 units right off the bat, and if I donāt see any turnaround beginning to occur at +2 hours, Iāll stack on +5 units every half hour, indefinitely, until I begin to see at least some drop-off off in the rate of ācrazyā rise beginning to occur.
I have taken a break from my work to explain all this. I try to NEVER use pump-based basal adjustments. Like other men or women suffering from this kind of inexplicable rise, Iāll have pumped in as much as as 100 āextraā units of insulin, with with only the ālastā 20-30 units it turing out to have been a mistake. I watch the CGMS like a hawk, my MD wife present through the evening and night, with a few blood-based bG tests tests to calibrate the Dexcom at these extreme bG levels so that the the turn-around from high high bG can be seen. Of course, fingerstick bG to confirm the turnaround when Dexcxom āannouncesā it.
Iāll often have reached bG of 300+ before seeing any response to all of that extra āInsulin On Boardā. When the shape of the curve finally show a drop-off in the rise. When it does start, I backfill really big. Donāt get distracted from the need to keep backfilling! Typically, Iāll gobble 3 or 4 tabs when my bG finally reaches 140 or so (going downwards, plus a big lump of some slightly longer-acting bread. This should cause a bit of a spike, back above 150ā¦
If so, good! Carefully calculate the maximum possibly active IOB, from the all the corrections done at 4, 3, 2, and 1 hour previously. (This needs paper, itās not an in-your-head guess.)Watch the graph like a hawk, for the next downwards turnaround to begin. Backfill again, a bit more gently, using only fast-acting glucose. Donāt do too much at once, but try not to let yourself fall below about 110 mg/dL until all the ācorrection/adjustmentā IOB is gone. Yeah, you might be up until 3 AM, and youāll be stuffing your guts with back-fill. Itās not fun, but Iāve not reached bG 400+ in many years.
Insulin works slow, back-fill works fast. So, when bG starts flying UP with no explanation, my tactic is to ALWAYS āover-correctā aggressively, and back-fill when/if needed. Because, as Iāve explained, it nearly always turns out not to be āover-correctingā at all-- a calculated correction, using my normal correction factor, will not be remotely adequate for the overwhelming liver-dumps which I frequently experience.
Many people (e.g. me, and e.g. John Walsh, the famous CDE) have found Dexcom to be WAY quicker than Minimed for showing turnarounds into falling bG. (And at catching lows). Wearing two devices is more of a hassle than wearing one, of course, and the Sensors are way more expensive-- but maybe you should consider a ātrialā switch, running both at the same time, and seeing if Dex gives earlier warning of dangerous drop-offs in progress?