She has her surgery tomorrow.

Does anyone have experiences with their LO getting tubes in his/her ears? My 6 month old is getting her tubes tomorrow because she's had 7 infections and has had fluid in them her entire life which has caused mild hearing loss. She has to arrive there at 6am and surgery is scheduled for 7. What will be done in that hour? Did your LO require oxygen after the procedure? I was told it only takes 5-10 minutes? How long was LO at the surgery center (or wherever) after the procedure until he/she got to go home? What are things to watch for at home after she is released from the surgery center?