A 27-year-old member asked:
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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
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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Dr. John Goldman
54 years experience Rheumatology
Synovial fluid: This fluid is produced by the knee to help cushion it. We all have joint fluid but depending on what type of arthritis one has can depend on the internal fluid that is there.
Answered on Nov 9, 2012

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Related questions:

A 45-year-old member asked:
Dr. John Michalski
35 years experience Orthopedic Surgery
Swollen joint: Almost any injury that causes synovitis can lead to joint effusion. Arthritis, gout, trauma, etc. Can cause this. Watch out, however, for infection of ... Read More
A 39-year-old member asked:
Dr. Allen Lu
Dr. Allen Lu answered
23 years experience Orthopedic Surgery
Orthopedist: Most orthopedists can drain the fluid off. However, many effusions (fluid within knee) return after draining. Your surgeon should also find the cause ... Read More
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A 26-year-old female asked:
Dr. Audie Rolnick
39 years experience Orthopedic Surgery
Pain?: Any injuries, does fluid go away right away, any other joints involved? Should have evaluated.
A 43-year-old female asked:
Dr. Jovita Anyanwu
29 years experience Internal Medicine
Yes: Fluid in the knee can be due to different causes most of which have treatment to control the symptoms. Hope depending on the analysis of synovial flu ... Read More

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