You will have some monitors placed (such as a blood-pressure cuff) and be given some medicines through your intravenous (IV) line to make you very sleepy. The anesthesiologist will then place a nerve block so that much of your knee (not all) will be numb. At the same time, the anesthesiologist will place a tiny tube, called a catheter, near your nerves that will be used after the surgery is over. You will still go to sleep for the surgery, but you will be much more comfortable when you wake up because the numbing medicine will be working to take away much of the pain. If you are not part of this study, you would go from the recovery room to a room in the hospital for 3-5 days, and your catheter would be removed the morning following surgery. After your catheter was removed, you would depend on oral and IV opioids—or pain medicine—to control your surgical pain. You would go home with only oral opioids since IV opioids cannot be provided at home.