https://forum.tudiabetes.org/topics/surgery-and-diabetes
https://forum.tudiabetes.org/topics/surgery-and-type-1
https://forum.tudiabetes.org/topics/do-nurses-test-blood-glucose
https://forum.tudiabetes.org/topics/583967:Topic:249411
just a few of the discussions I found on the type1 forum
personally, the last time I had surgery, I was out for less than an hour, but I made sure I was running somewhat high before I went in. good luck, hope it all goes well for you.