I havent had knee surgery but have had other surgeries. They are all a bit scary because you put your trust in someone else for a bit of time (while you are under anesthetic). Knee surgery has come a very long way the last few years...so many replacements, "clean outs", etc. Your doctor has probably had plenty of experience with this procedure. The nurse will probably give you something to help you relax prior to the surgery (this helps a lot) and like a blink of an eye, the procedure will be over and you will be recovering and on your way to having a happier knee. Concentrate on slow deep breathing if you become anxious. Let us know how you are doing. Take care!