Periprosthetic Joint Infection Diagnosis. A Complete Understanding of White Blood Cell Count and Differential

Benjamin Zmistowski, Camilo Restrepo, Ronald Huang, William J. Hozack, Javad Parvizi

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

Recent research has raised doubts regarding the utility of serum white blood cell count (WBC) for diagnosis of periprosthetic joint infection (PJI). As synovial WBC and neutrophil (PMN) percentage have been adopted as accurate markers of PJI, this study investigated the correlation of WBC in serum versus joint fluid and diagnostic value of all WBC levels for failed arthroplasty patients. 153 patients (73 PJI) undergoing revision knee arthroplasty were identified. Weak correlations between joint fluid and serum for WBC (R = 0.19), PMN count (R = 0.31), and lymphocyte count (R = -0.22) were observed. Diagnostic accuracy of PMN (93%) and WBC (93%) synovial count relative to serum was similar to synovial WBC (93%) and PMN% (95%) alone. Serum WBC analysis does little to improve the accurate diagnosis of PJI.

Original languageEnglish
Pages (from-to)1589-1593
Number of pages5
JournalJournal of Arthroplasty
Volume27
Issue number9
DOIs
StatePublished - Oct 2012

Keywords

  • Knee arthroplasty
  • Knee revision
  • Periprosthetic joint infection
  • Synovial and serum white blood cell count

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