Culture Of Joint Fluid  Culture Of Joint Fluid  Alternate Names
• culture of joint aspirate   A culture of joint fluid, or
aspirate, can identify bacteria or organisms in joint fluid that
may be causing an infection in a particular joint. The test is
normally done when a joint is swollen, painful, or appears to be
infected.  Who is a candidate for the test?  This test is
normally performed to help diagnose arthritis, or an infection
in a joint.  How is the test performed?  First, a sample of
fluid is taken from the swollen joint. The skin overlying the
joint will be anesthetized with a local anesthetic, such as
lidocaine, and then be carefully cleansed before the procedure
is performed. Then, a sterile needle is inserted through the
skin into the joint. A small amount of fluid is withdrawn from
the joint. This sample is sent to a laboratory for testing.
Usually, the fluid is then placed on special culture media to
see if bacteria or other microorganisms will grow.  What is
involved in preparation for the t