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Synovial Fluid Analysis

Also known as: Joint fluid analysis
Formal name: Synovial fluid analysis
Related tests: Glucose, Uric acid, Gram stain, Susceptibility testing, WBC, RBC, AFB smear and culture

Common Questions

1.  What is arthrocentesis and how is it performed?

Arthrocentesis is the removal of synovial fluid from a joint with a needle and syringe.  A local anesthetic is applied and then the doctor inserts the needle into the space between the bones and collects the synovial fluid.

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2.  Are there other reasons to do an arthrocentesis?

Yes. Sometimes it will be performed to drain excess synovial fluid – to relieve pressure in the joint and/or to aid in the treatment of an infection. Sometimes medicines such as corticosteroids will be introduced into the joint to help reduce inflammation and/or to relieve pain.

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