Tubes for culture. Description of test You or a close relative will be required to sign a consent form after the procedure has been explained to you. The anesthetic is administered. The procedure does not begin until you are numb. Skin over the joint is cleaned with antiseptic solution.
Doctor quickly inserts the aspiration needle into the joint space.
You may feel a temporary pain when the needle penetrates the joint capsule. Fluid is suctioned into syringe. Needle is withdrawn. Fluid is sent to the laboratory for analysis. After the test Immediate post-test care Apply an ice pack or cold pack to the affected joint for 24 to 36 hours to decrease pain and swelling.