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- W3136183944 abstract "Background The alpha-defensin test known as Synovaure has been very effective in diagnosis of prosthetic joint infections (PJIs). Being able to easily and accurately differentiate septic and inflammatory arthropathies in native joints would improve diagnostic workup and management. We tested the ability of an alpha-defensin test to distinguish septic from inflammatory or crystalline arthropathy in the native knee. Methods 40 native knee joint fluid specimens were tested with cell count, fluid analysis, and culture and alpha-defensin testing. We determined the sensitivity and specificity of the alpha-defensin test using culture-positive fluid as the gold standard for septic arthropathy and positive crystals as the gold standard for crystalline arthropathy. Results The Synovasure PJI test had 100% specificity for septic arthritis coupled with a 28% false-positive rate when applied to native knee aspirations. False-positive rate was 5.3 times higher in patients with crystals found in the joint fluid. Conclusion Alpha-defensin testing, in the form of the Synovasure PJI test, has a high-false-positive rate when used to distinguish septic and inflammatory arthritis in the native knee joint. Future work will need to determine the sensitivity and specificity of the newer native joint panel. Clinicians should be cognizant of the specific alpha-defensin test used when sampling native knee synovial fluid." @default.
- W3136183944 created "2021-03-29" @default.
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- W3136183944 date "2021-08-01" @default.
- W3136183944 modified "2023-09-27" @default.
- W3136183944 title "The Alpha-Defensin Prosthetic Joint Infection Test Has Poor Validity for Native Knee Joint Infection" @default.
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- W3136183944 doi "https://doi.org/10.1016/j.arth.2021.03.020" @default.
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