What is this test?
This laboratory test is performed on synovial fluid (joint fluid) to determine the presence of infection-causing bacteria. It also detects RBCs, WBCs, crystals, glucose, and proteins in the synovial fluid.
Why is this test performed?
This test is performed:
- To identify the cause of joint inflammation
- To devise a treatment plan for the condition
- To monitor the efficacy of treatment
- How to prepare for this test?
Your doctor might recommend fasting for a few hours before the test. No other preparations are required for this test.
- Where is the synovial fluid aspirated from?
- Knee (most common)
- Hips
- Ankles
- Shoulders
- How to treat the swelling from the insertion of needle?
Pain and swelling might appear after this procedure. Apply ice on the area to reduce these symptoms.
- What is synovial fluid?
Synovial fluid or joint fluid is a viscous fluid present between the joint. It provides support, cushion, and frictionless movement to the joint.
- What are the complications of joint aspiration?
Complications from joint aspiration are rare, they include:
- Fever
- Swelling
- Bleeding
- Redness
- Restricted motion
- Discharge from site.
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Positive or negative
- Interpretation of test results:
Positive: Pathogenic organism detected and identified on culture. Sensitivity testing provides the most effective treatment for the causative organism.
Negative: No growth on culture.
You should get tested if you have symptoms of gout, arthritis, or bacterial infection.