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Orthopaedic Proceedings
Vol. 100-B, Issue SUPP_9 | Pages 33 - 33
1 May 2018
Raza A Diament M Kulbelka I Baker P Webb J Port A Jameson S
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Introduction

Periprosthetic joint infection (PJI) can be difficult to diagnose. A variety of techniques have been described. The efficacy of the alpha-defensin laboratory test was examined and compared with other established modalities in the diagnostic workup of ‘real world’ arthroplasty patients.

Methods

This was a retrospective review of 210 episodes (86 hips, 124 Knees) in 172 patients at one centre, and included samples from acute admissions, elective aspirations, and planned revisions. MSIS (musculoskeletal infection society) major and minor criteria were used for diagnosing PJI.

Each patient was investigated using a standardised protocol with inflammatory markers, synovial fluid analysis for white cell count (SWCC) and polymorphonuclear leukoctyes percentage (PMN %), and synovial fluid/tissue culture. Synovial fluid was also tested for alpha-defensin.