what is arthrocentesis?
Arthrocentesis, also referred to as joint aspiration, is a procedure where fluid is drained from a joint using a needle and syringe. The fluid is sent to a laboratory for joint fluid analysis. Arthrocentesis is primarily used to establish the cause of the joint effusion. Removing joint fluid has two purposes, a therapeutic as well as a diagnostic purpose. The removal of joint fluid may also relieve pain and pressure on the joint.