Excessive growth of irritated
synovial membrane causes it to increase its surface area by buckling into fronds, and the fronds may become inflamed and pour destructive enzymes into the joint space, causing joint swelling and joint surface destruction. Removing this excess material via lavage frequently resolves arthritic knee inflammation or pain. Arthroscopic lavage is one of many procedures available to help reverse the damage of early
arthritis. There is, however, controversy about the value of simple lavage and debridement for the older patient with established
osteoarthritis. Needle lavage should not be used in an attempt to treat persons seeking long-term relief for symptomatic osteoarthritis of the knee. The use of this treatment in this case has not been shown to decrease pain, stiffness, tenderness, or swelling, or to increase 50-foot walking time or body function. ==References==