I had TKR Feb 19. When the nerve block wore off the next day, i had unbearable pain when I stood up. As the blood ran into my leg as I stood up, it was immediately on FIRE. The worst lasted for more than 2 weeks, no sleep during that time. Doctors staff was totally incompetent with the pain meds. Could not do the physical therapy due to pain. I was told by an anesthesiologist and a physical therapist that i must have nerve damage. By the time i was able to do physical therapy, I had already built up enough scar tissue that i could not bend past 90 degrees no matter how hard i tried. Doctor said he had to go in and remove scar tissue with an arthroscopic procedure. He said i should have the Iovera before the procedure. I trusted him and did no homework. Had Iovera May 10, surgery on May 22. Iovera procedure was very uncomfortable. He hit the nerve a couple times resulting in electrical shock like pain. Knee was totally numb after with some pain and swelling at the injection sites with a large knot in my quad just above the knee. Arthroscopic surgery went well, 135 degrees flex within a few days with minimal pain. He had me on 10 mg oxy for 10 days after the procedure. I am over 4 months from the Iovera, and still very numb. Occasionally i get a stabbing pain in the knee and sometimes in the foot.?? I think being able to feel what is going on in the knee would help in the recovery. I am having a difficult time strengthening the leg. Walking up steps is difficult. Before the TKR surgery, i had no trouble with strength, only pain. I feel like the Iovera has hindered my recovery. It could be that the PA did not do the procedure properly since i was told that the numbness would last up to 90 days. If I knew then what I know now, I would never have done the Iovera. Avoid it if you can.