Sami has had three bronchs, all without major problems. After the first, she did need some oxygen for about an hour. The second was without incident. The third actually did wonders for her, whatever they flushed out really helped clear up her breathing issues.
I still do not like that she has had these invasive procedures, but in her case, they were necessary. She was having a lot of respiratory problems and not responding to orals or asthma meds.
Like Leah stated, the procedure is pretty fast. The doctor will come and give you results of what he/she saw right after the procedure. The cultures may take a few days (like a typical throat culture). Although, they usually can tell you if a gram-negative bacteria is growing by the next day (i.e. pseudomonas). In Sami's case, the last bronch revealed fat laden cells which shows that she was refluxing and aspirating into her lungs.
Good Luck - everything will go well!
Maria (mom to Sami 2 1/2 w/cf)