Fluid Examination Routine - SYNOVIAL FULID
Also Known As
Test Parameters Included
- Synovial Fluid Appearance, Cell Count & Differential (WBC/mm³, Neutrophils %, Lymphocytes %, Macrophages %)
- Crystal Analysis, Gram Stain, Culture & Sensitivity, Mucin Clot Test - Pathologist Microbiology Remark
Department
Methodology
Sample Required
Preparation
Schedule Report
24 Hours
Emergency Report
Yes
Frequently Asked Questions
Why is synovial fluid examination done?
It helps diagnose the cause of joint swelling and pain, distinguishing between infectious arthritis, gout, pseudogout, and inflammatory conditions like rheumatoid arthritis.
Is fasting required for this test?
No, fasting is not required. Synovial fluid is obtained via arthrocentesis, a needle aspiration from the affected joint.
How is the sample collected?
A sterile needle aspiration (arthrocentesis) is performed by a doctor under local anesthesia, drawing fluid directly from the joint space into sterile collection tubes.
What do high white blood cell counts in synovial fluid indicate?
Normal fluid has fewer than 200 WBC/mm³. Counts above 2,000 suggest inflammatory arthritis, while above 50,000 strongly indicate septic (infectious) arthritis requiring urgent treatment.
How long does it take to get results?
Routine microscopy and cell count reports are available within 24 hours. Culture and sensitivity may take 48–72 hours for final results.
Can medications affect synovial fluid test results?
Yes, recent joint injections (steroids or antibiotics) can alter cell counts and culture results. Inform your doctor about any recent treatments before aspiration.
Test Description
Test Code
F13Sy
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