I've had it done and quite frankly, I would rather be disembowled. It was a brutal, barbaric procedure.
I was waterskiiing and fell foward and caught the ski in the face

. The procedure itself took about 50 minutes, the painkillers I was given, while really potent were only good for about 30 minutes, so the last 20 minutes or so were pretty bad. I was concious during the procedure and they had me hooked up to a BP monitor to make sure I didn't go into shock. I closed my eyes was able to "check" myself out during the procedure and as such, my BP didn't move at all, even during the last 20 minutes when the pain killers were more or less gone. The doctor was pretty impressed.
If you want the actual details of the procedure, I can share, but in the end, the cartiledge was so mushed up from the impact, it didn't stay in place (straight) after the procedure (even with a splint). On the follow-up visit, when the doctor pulled the splint and the packing inside my nose (which was in there for about 3 weeks and was starting to rot, which was REALLY pleasant), he offered to try again. I just laughed and walked out. I was gonna pee on his desk, but figgered that would get me DC charge

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My regular doctor has told me now that the cartiledge has "healed" up (accident was about 10 years ago), they could possibly go in there an rebreak it and possible straighten it out. Not a freaking chance.
Depending how bad yours is, the procedure may not be as bad as mine. I was pretty messed up and the doctors were afraid the cartiledge would just collapse and heal that way blocking my nasal passages which is why I had it done. They probably could have just packed it and saved me the grief and I would have most likely had the same end result.
have fun