i had to go last week to have a FCE test done to see if my knee is impaired.i have had 5 surgurys in 2 years on my right knee and nothing has changed.i have constant swelling and in constanly gives out causeing me to fall.it started when i had a mishaps with a nail gun and int went off and lodge the nail from the outside of my knee and then in to the knee cap.and 2 points i was placed in the hospital for weeks at a time for infection.also i this time i was operated on twice for irragation of my knee.know the doctor says the test i took shows that i am 13% impaired and im not sure what that means im just a simple minded country boy.......any help or comments will be great on what to expect next out of all this