One night when I had my knee replacement. I was pretty sick after I had my knee scoped which was my 4th surgery, but it cleared up after about 4 hours. My TKR was next and I was really sick. I couldn't hardly open my eyes and the room went spinning hard. I was supposed to get up and walk on a walker and then I could go home. That didn't work. The next morning I was fine. Walked to the toilet, took a dump and got back into bed. The staff and PT geeks were surprised that I got up on my own.
