Two days ago, I came down with a nasty viral infection. I had been having a great trend of overnight BG control. I use a CGM so I'm able to monitor this. Two nights ago, my Dex alarms woke me up to 200+ BGs. Even though I made three high BG corrections during the night, this persistent 200+ high greeted me in the morning.
Since the BG correction insulin doses did not seem to matter, I decided to set a +200% temp basal and see what happened. Over two to three hours my BG flattened out at about 110 and proceeded to travel sideways.
After about 4 hours of this temp basal, I let it time out. What I observed was a slowly climbing CGM line. I decided to forego my usual late morning meal in the interest of keeping my BGs in a good range. That evening, I was able to eat and the post-meal BG line was normal.
Today is day three of this illness and I've been alternating between +200%, +100%, and normal basals, with the majority of time under some temp +basal % rate. My BGs have been controlled very well.
Another TuD member, acidrock, has mentioned his use of temp basals in his bag of tricks. I would have been timid to try the +200% without his experience. I caution anyone interested in trying this out to be extra vigilant monitoring their BGs with a CGM or at least an hourly fingerstick. This includes setting multiple alarms if you run them overnight without a CGM.
It's kind of amazing to me that the elevated temp basal can pull down a high BG when the correction dose doesn't seem to have any effect.