Background And Purpose: Periprosthetic joint infection (PJI) is a significant and challenging healthcare issues. Accurate diagnosis is essential for effective treatment. The aim of our study is to underscore the usefulness of the new EBJIS definition and criteria when applied in a developing country department.
Methods: We conducted a retrospective analysis of a single-center cohort of consecutive revision arthroplasties (January 2018-June 2024). This study was carried out at the Department of Orthopedics and Trauma Surgery in the University Hospital Fattouma Bourguiba in Monastir, Tunisia. Were included in our research patients who underwent revision surgery for arthroplasties due to septic failure. Exclusion criteria were: surgery performed within the previous six weeks, antibiotic-loaded bone cement spacer in place, the second step of a two-stage revision and periprosthetic fractures.
Results: A total of 46 patients were included in the study. According to the EBJIS criteria, our cohort was divided into two groups: "likely infection" including 12 patients (26.1%) and "confirmed infection" with 34 patients (73.9%). Clinical signs like inflammation (Se 85.3%, PPV 76.32%) and pain (Se 76.47%, PPV 70.27%) demonstrate higher sensitivity but low specificity. Among paraclinical tests, a CRP level > 10 mg/dL is highly sensitive (97.06%), while PMN > 80% shows perfect specificity (100%). Tissue samples with more than two positives and cultures with the same microorganism exhibit high sensitivity (96.66% and 80%) and PPV (84.85% and 85.71%).
Conclusion: Establishing PJI diagnosis is challenging and depends on paraclinical testing. We highlight the lack of important diagnostic instruments in settings with limited resources.
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