I have long standing arthritic changes in both knees. I have moderate to severe arthritis. Lately, the pain has gotten worse. Going up and down steps is becomming more problematic. I often have to go sideways when I go down the steps. Getting up from a chair is often painful. If I get up after sitting awhile, my knees often lock for about 10 seconds. Lately, when I am sitting, I get painful stabbing pains around the knees? I went to the ortho recently. He reccomended synvisc. If that doesn't work he would try cortisone shots. I have tried pt several times. If the relatively non invasive proceedures don't work, then I woulld be potentially facing double knee replacement. Does anyone have any feedback or insights for me?