Hi...About a year ago I had a major surgery and was concerned about intubation because I've heard that it can occasionally (rarely) be hard on people with SD (and can even be a possible trigger for SD symptoms appearing for the first time in people.)
My surgery had to be done, however, so just before surgery, I spent some time talking with my anesthesiologist and my fears about intubation making my SD worse. He had actually heard of SD but had not heard about the problems with intubation. He spent some time researching SD (so that was good, as now another person in the medical field knows a LOT about SD. ) In the end he could only promise to move very carefully and slowly as he did the intubation (and later removed it.) I ended up having no added effects from the intubation (and my surgery was a couple of hours long.)
Good luck to you, and I hope all goes well. I would take the time to talk with your anesthesiologist about your concerns, though.
Mary