Synovial fluid specific gravity as an inexpensive point-of-care test for diagnosing hip and knee periprosthetic joint infection

Key Points

• To assess the diagnostic accuracy of synovial fluid specific gravity in detecting periprosthetic joint infection.
• Evaluated synovial fluid specific gravity as a diagnostic test for joint infection.
• Conducted in the context of revision arthroplasties.
• Analyzed sensitivity and specificity of the test.
• Achieved high diagnostic accuracy with an area under the curve of 0.89.
• Showed 100% specificity and 65% sensitivity for diagnosing periprosthetic joint infection.