I had the nasal tube and it is no problem with the mask, you just unhook it and they feed it thru the hole by the nose...I had a lot of problems with mucous in my mouth, this may sound gross but I "blew" my mouth much like you would blow your nose, right into a kleenex (went thru a lot of them) but it really helped me get rid of it. I used morphine (liquid) because oxy did nothing for me...and the fentynol patch. Take the pain meds, try to eat and rest...good luck to you both you're almost there!