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What Is the Optimal Criteria to Use for Detecting Periprosthetic Joint Infections Before Total Joint Arthroplasty?

Sumit Kanwar1, Ahmed A Al-Mansoori1, Manisha R Chand1

  • 1Department of Orthopedics, Cleveland Clinic Florida, Weston, Florida.

The Journal of Arthroplasty
|April 11, 2018
PubMed
Abstract

Insights

Alpha-defensin accurately diagnoses periprosthetic joint infection (PJI) before knee and hip revision surgery. Combined with aspiration cultures, it improves diagnostic accuracy and helps predict successful reimplantation outcomes.

Area of Science:

  • Orthopedic Surgery
  • Infectious Diseases
  • Diagnostic Medicine

Background:

  • Periprosthetic joint infection (PJI) is a significant complication of total joint arthroplasty.
  • Accurate diagnosis of PJI before revision surgery is crucial for successful patient outcomes.
  • Existing diagnostic criteria, such as the Musculoskeletal Infection Society (MSIS) criteria, have limitations.

Purpose of the Study:

  • To evaluate the diagnostic accuracy of alpha-defensin and combined alpha-defensin-aspiration cultures for PJI.
  • To assess the predictive value of MSIS criteria and alpha-defensin for successful reimplantation after PJI surgery.

Main Methods:

  • Retrospective evaluation of 97 synovial fluid aspirations from patients undergoing revision total knee and hip arthroplasty.
  • Analysis of alpha-defensin levels, cell counts, and cultures in synovial fluid.
  • Categorization of revisions using MSIS criteria and assessment of reimplantation success at 1 year.

Main Results:

  • Alpha-defensin demonstrated high sensitivity (97%) and specificity for PJI diagnosis.
  • The combination of alpha-defensin and aspiration cultures achieved 96% sensitivity and 100% specificity.
  • 11% of second-stage reimplantations failed due to infection despite negative MSIS criteria and alpha-defensin results.

Conclusions:

  • Alpha-defensin is a reliable diagnostic tool for PJI prior to revision arthroplasty.
  • Combining alpha-defensin with aspiration cultures enhances diagnostic specificity and positive predictive value.
  • MSIS criteria and alpha-defensin show potential in predicting reimplantation success within one year.
Keywords:
MSIS criteriabiomarkerperiprosthetic joint infectiontotal hip arthroplastytotal knee arthroplastyα-defensin

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