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Is routine synovial fluid analysis necessary? Lessons and recommendations from an audit
1Withington Hospital, South Manchester University Hospitals NHS Trust, West Didsbury, UK.
Rheumatology International
|July 10, 1999
Summary
Routine synovial fluid analysis is rarely helpful for diagnosing established rheumatic conditions. This study found crystals in only 6.1% of samples, with limited diagnostic impact, suggesting cost savings by limiting its use.
Area of Science:
- Rheumatology
- Clinical Pathology
Background:
- Synovial fluid analysis is a common diagnostic tool in rheumatology.
- Its utility in established rheumatic disorders requires evaluation.
Purpose of the Study:
- To audit the diagnostic yield of routine synovial fluid analysis.
- To assess the contribution of cell counts and crystal analysis to patient management.
Main Methods:
- Audit of 408 synovial fluid samples.
- Analysis of cell counts and crystal presence.
- Correlation with patient diagnoses.
Main Results:
- Crystals detected in only 6.1% of samples (25/408).
- Analysis was helpful in only 3 patients with uncertain diagnoses.
- Cell counts generally correlated with known diagnoses like inflammatory arthritis and osteoarthritis.
Conclusions:
- Routine synovial fluid analysis offers limited value in established rheumatic disorders.
- Analysis is most beneficial in uncertain or new-onset cases.
- Discontinuing routine analysis could lead to significant cost savings.