I was told in January of this year that I need a TKR as there is bone rubbing on bone, no cartilage in my left knee. I was seen by an Orthopaedic surgeon in a hospital and I saw the x-ray myself. My question is this. I can still walk, although my knee gives out sometimes, I have a throbbing pain constantly and I do have some troubling walking. I can’t walk far. What should I do? Should I book the operation? Should ?I let it go for a while longer? What will be the outcome if wait? I am 78 now and really don’t want to go through with this, but am worried that I may end up in a wheelchair not being able to walk. I am also about 50 lbs. overweight. I have a bad back also. I would appreciate any suggestions.