Investigations
The most important diagnostic test for osteoarthritis is the x-ray of the affected joint.
Other investigations include:
- FBC and ESR are both normal
- RF is negative, unless osteoarthritis is secondary to rheumatoid arthritis
- synovial fluid aspiration / microscopy
- if gout is considered, check serum uric acid
Reference:
- Osteoarthritis in over 16s: diagnosis and management. NICE guideline (October 2022)
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