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Definition of culture-negative periprosthetic joint infection (Berbari et al)8
| (i) Periprosthetic purulence observed at the time of operation |
| (ii) Histopathological features consistent with acute inflammation |
| (iii) Elevated synovial white cell count (> 1.7 × 103 /μL3) or elevated synovial neutrophil (PMN) percentage (> 65% PMNs) or |
| (iv) Sinus track in direct communication with the joint |
