A 27-year-old member asked:
when they say an injured athlete had fluid drained from a swollen joint such as the knee, what is this fluid?
2 doctor answers
Dr. Frank Holmes answered
22 years experience Sports Medicine
Synovial fluid: Usually this is synovial fluid. Synovial fluid's job is to lubricate and protect the joint. In the presence of injury, inflammation or infection, the synovial lining (part of the joint capsule), overcompensates by producing an excess amount of synovial fluid. Too much fluid can cause pain and tightness in the joint and restrict range of motion. With an acute injury, blood may also fill the joint.
Answered on Nov 5, 2012
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