I think they say it can take anywhere from a couple hrs to 6 hrs - with it typically being in the 3-4 hr range. And they warn your family, that even after it's over, it may be a while before the doc comes out to tell them it went fine - so they shoudln't worry if it's getting longer than they thought. Mine started at 8 am, and I think by 11 or 11:30 I was awake (if I remember right - I'll confirm with those who were in the room when I woke up). Of course, your mileage may vary. I've always woken up quickly from anesthesia. I was only awake briefly, long enough to realize, yay, I made it, and to have them tell me it all went fine - just as expected. Which gave me enough peace of mind that I think I went back to sleep for a while (will have to ask others how long - but seems like maybe another hr or two?). When I woke up that second time, I was very much aware of the breathing tube and they could tell I didn't like it, so they took it out (again, I'll confirm with others to make sure it wasn't 6 hrs later and I thought it was an hr later, lol). I was pleasantly surprised that it didn't hurt when they took the tube out, and felt much, much better (in my case) once it was out. But as many have reported, most people don't even remember the tube being taken out. After the breathing tube is out, you still have the chest tubes, the bladder catheter and 2 or 3 IVs in (one of which was in my neck - I think for the heart/lung machine?). And an oxegen tube loosely fitted in your nostrils. Most of those things stay in until you're out of ICU (which in my case was about 20 hrs after surgery, but can be longer than that for others I think) and some of them may stay in a little longer yet (I don't remember exactly when they took out the bladder cath - think it might have been a day or two after surgery). But by about day 2 or 3, you're likely down to just one IV and that's it.