I understand exactly what the original poster went through . I just experienced the more extreme case. All my doctors are associated with one regional hospital.
I had to have a colonoscopy last month . the five-day long prep for the surgery required going far off of my normal diet . The instructions to me by my endocrinologist, the one who had prescribed my tandem pump with G6 and control IQ, was to turn off control IQ at midnight before, manually set an arbitrary basal rate half my normal and have my BG above 150 mg/dL for the procedure. The prescribed “lowered fiber” diet eliminated the few things I was eating to get my fiber level high enough to have regular bowel movements.
I knew from past procedures that if I weren’t in a pump and above 180, they’d give me insulin whether I wanted it or not and if I hadn’t intervened the last time they would have over-dosed me with double the needed correction if the target were 120 mg/dL.
As the “prep” for the last 6 hours I was supposed to have anything by mouth ending at midnight was clear liquids like regular 7up.
I had to argue with the endo and the gastro for permission to have Control IQ enabled in excercise mode to help keep me in the desired absurdly high range to help keep me above 140. The endo resisted until the diabetes educator had the pump makers trainer discuss it with her. The endo had no understanding of how Control-IQ worked.
I then had to ask what I could do with “nothing by mouth” if my BG dropped using the basal rate she prescribed. I got “permission” to sip apple juice.
I offered to have a pre-procedure meeting with someine from the gastro’s team, to explain if necessary how my pump worked and what could be done to monitor or correct my BG during the procedure if needed. They declined.
The night before the procedure I was up until 2am emptying my bowels. At 3am when I was supposed to be getting a good night’s rest before the 7:30am procedure, I needed to suspend insulin delivery for an hour and sip 8 oz of apple juice over 3 hours to get my BG above 140 and stable. The original directions would have put me in severe hypo, if not a coma.
Now I know that I’m an outlier. I’ve had zero time below range since before I started the pump, and +95% TIR, since I started, and my last A1C was 6.
If I were a poorly controlled with high A1Cs, then the surgical prep goal would have been aspirational. But the protocol I was automatically given seems designed to jeopardize those with diabetes who have been routinely managing their diabetes carefully and effectively, and risk death of those who use the latest medical technology.
It really calls into question whether those following guidelines as if they were gospel understand “first, to do no harm”.