re: Who here has had a total knee replacement?

It is a major surgery so as long as she has that expectation, it will be fine. The younger ones usually go one of two ways. They rock and roll quickly or they have poor pain tolerance and are a bigger pain in the arse. The stairs should not be an issue especially since she is young and able. You just go one at a time and rely on the non operative leg to do the work. Helps to have a rail. They seem more daunting than they are. All that should be reviewed prior to hospital discharge or at the least in initial home health. Good luck