A synovial (joint) fluid analysis is a group of tests your doctor can use to diagnose problems with your joints.
Synovial fluid is the thick liquid that lubricates your joints and keeps them moving smoothly. It’s on all of your joints, including in your knees, shoulders, hips, hands, and feet.
It is used to diagnose the cause of joint inflammation, pain, and/or swelling.
Normal synovial fluid is clear, colorless or pale yellow, stringy, free of bacteria, viruses, and fungi.
Abnormal synovial fluid may be cloudy or thick.
A high white blood cell count can be from infection or another medical condition.
A high red blood cell count may happen when there is blood in the joint from an injury or bleeding disorder.
A high uric acid level and crystals can signal gout.
