Chondromalacia Patellae, Arthroscopic Surgery, Ankle Sprain, Sciatica Pain

50 yr old female diagnosed at 15 with Chrondromalacia Patellae in both knees, not athletic - no running, jumping stooping. can t kneel or squat still suffering after Arthroscopic surgery at 36 due to 2 car accidents, nerve damage below left knee from first accident, subsequent years consisted of multiple fall on knees, sprained instep, sprained right ankle, sciatica pain on left side. Unable to sleep, walk up/down hill or stairs w/o assistance, getting in/out of vehicles, sit w/out legs going numb, stand for long periods. Have had PT, didn t work due to condition. Have had 2 MRIs & 2 Nerve conduction tests, and had blood tested in 1994 for the possibility of Arthritis . MRIs & blood test returned negative.