I have severe sleep apnea, and I made sure I mentioned it to the surgeon and the anesthesiologist, and it wasn't a problem. You'll be intubated, so the apnea shouldn't come into play during the surgery.
However, the tube can leave your airway sore and swollen, which can cause extra problems for apnea sufferers after surgery.
Try to arrange with the hospital to take your own CPAP machine to he hospital. The machine they gave me from the inhalation dept. was horrible. It seemed to be overpowered, even though I told them the pressure setting I wanted. Then, when I asked them to lower the pressure for the third night of my stay, they said they couldn't do that without a doctor's order....this in spite of the fact that I was the one who told them the pressure setting in the first place.
Their machine was also very loud, whereas mine is perfectly quiet. I don't use a humidifier, but had them add one to their hospital machine to help with the swollen airway.
Be sure to take your own mask.
I think those are the biggest considerations. If I think of anything else, I'll try to add them later. Good luck.