our ds20 had it last year. His surgery was well over an hour. He had the deviated septum,nasal polyp removed and something about his concha? being mis shapen so the surgeon fixed that too. Ds was miserable, miserable for 3 days, just lived on pain killers and ice water. Couldnt swallow, couldnt eat, threw up Lots of blood, slept on the couch as you have to keep your head elevated, constant sinus rinses.
He does has asthma and really bad allergies but after all the surgery he says he can finally breathe out of one of the nostrils, something he couldnt do much of before.
Wishing you all the best. He did have the ct scan too and it showed his sinuses were fine, but the concha thing was mis shapen. I think it has something to do with the sinus drainage?