This past Saturday, I had a sever hypoglycemia and ended up in the hospital for observation. I do have hypo-unawareness and have had low that effect my behavior and perceptions beyond just being confused. But this one was on a different level.
First my question: If the correction factor is set too low (high ratio), can that result in over treament of a high bG? Maybe Control-IQ can’t lower the bG and gets more aggressive. That is the best theory I can come up with to explain this incident. It’s either that, or it’s one of those inexplicable things. I prefer explanations…
The detailed backstory:
I had breakfast about 7 am and the next thig I know I’m laying on the couch surrounded a half dozen EMTs and it’s 4 pm. When I came around I thought I hadn’t eaten breakfast after bolusing. But it was not that simple.
Chronological order with a bit of reconstruction:
Got up. Fed the Dog. My bG was high, so I bolused for breakfast + correction. I waited about 15 minutes, then ate a bagel. Shortly after that, my sensor expired and changed it and started the warm up. I kind recall feeling tired and going back to sleep, which is my routine on the weekend after feeding the dog. I don’t recall if I did something else before that or which couch I lay down on.
Next thing I remember, I’m having a nightmare. There are a half dozen faces very close, looking at me very intently. The faces all seem to be the same. They were all wearing the same blue uniforms. I feel I am trapped in a net. I struggle and break free. Feeling relieved, I roll over and go back to sleep.
Then I start coming around. Everything is strange, I don’t know where I am or why all these people are so concerned. Then it dawns on me that I am confused and these people are EMTs and figure I probably had a low or something. I reach for my pump, but can’t figure out what it means or what to do. More and more, over a stretch of ~20-30 minutes, I start to get a grip and things start making more sense. Our best friend is there. My wife is on the phone, calling from out of town. They ask when I last ate and what I had. I thought I hadn’t eaten at all, but I did take my breakfast bolus. After some “advice,” I relent and let the EMTs take me to the hospital.
After, I was told: my son found me laying on the couch. Thinking I was napping, he started talking to me. I responded with gibberish. He went upstairs and could hear me talking to the dog in regular English, which compounded his concern. He called my wife, our friend and 911, but I don’t know in what order. When the EMTs arrive, I am combative, thrashing and uncooperative. They can not get an IV in me so they try to force oral glucose gel. There was a mess of it all over my face, but they must’ve gotten some in. Then I passed out and they were able to get an IV in and test my bG. It was 44. My son said they injected something into the IV tube. I’m thinking I got dextrose and glucogon.
At that time, I thought I’d bolused for b-fast + correction. Maybe the basal was also elevated because I was high. Then I changed the sensor and the pump had no glucose readings for two hours and was unable cut the basal. With that much insulin on board, it wouldn’t have made a big difference, but may have prevented me breaking from reality and I might have eaten and/or taken glucose.
But after my bG stabilized and they released me from the hospital, when we get home, I notice a plate on the kitchen table and remembered eating a bagel. So why I did I go so low? A couple of day before, I’d been adjusting the correction and carb ratios. So I went to my profile and found that my correction ration was 1:18, where is was previously 1:9. I know exactly how that happened. I entered both the 1 and the 8, not realizing the the 1 is implicit and fixed. So I’d set it to 18. I must have just blew past the confirmation prompts.
But then I realize that would under deliver insulin and was less likely to cause a hypo. So maybe Control-IQ increased the corrections to a point where it was too much?