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Published in: International Orthopaedics 11/2023

Open Access 16-08-2023 | Joint Infection | Original Paper

Leukocyte esterase and alpha-defensin in periprosthetic joint infection: predictive quality and correlation in a prospective study

Authors: Leonard Grünwald, Florian Schmidutz, Philipp Döttger, Felix Erne, Anna Janine Schreiner, Philipp Hemmann

Published in: International Orthopaedics | Issue 11/2023

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Abstract

Purpose

Periprosthetic joint infection (PJI) is a rare but serious complication of total joint arthroplasty (TJA). An accurate diagnosis of PJI preoperatively does not exist. Alpha-defensin (AD) is a proven and common indicator. The diagnostic marker of leukocyte esterase (LE) promises some advantages: feasibility, availability, and fast result reporting. The aim of this study was the evaluation of the predictive quality and correlation between both diagnostic tools in the diagnosis of PJI.

Methods

A prospective study was conducted between April 2018 and August 2022. All patients with suspicion of PJI on hip and knee joint were included and underwent a routine and standardized joint punction. For laboratory diagnostics of AD, the synovial liquid was analyzed by ELISA. The sample was additionally applied to a LE test strip (Combur 10 Test, Roche Diagnostics, Mannheim, Germany).

Results

A total of 249 patients were examined (mean age 67.12 ± 11.89; gender distribution man/woman 139 (55.8%)/110(44.2%), hip/knee 71(28.5%)/178 (71.5%). According to EBJIS criteria, PJI was diagnosed in 54 (21.7%) patients. AD showed excellent results with an AUC of 0.930 (sensitivity/specificity 0.870/0.990). LE yielded very good results with an AUC of 0.820 (sensitivity/specificity 0.722/0.918). Both parameters showed a strong positive correlation.

Conclusion

LE is a rapidly available alternative in PJI diagnostics. The simultaneous determination of both markers may enhance diagnostic reliability. A routine usage may shorten the time from diagnosis to treatment of PJI.
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Metadata
Title
Leukocyte esterase and alpha-defensin in periprosthetic joint infection: predictive quality and correlation in a prospective study
Authors
Leonard Grünwald
Florian Schmidutz
Philipp Döttger
Felix Erne
Anna Janine Schreiner
Philipp Hemmann
Publication date
16-08-2023
Publisher
Springer Berlin Heidelberg
Keyword
Joint Infection
Published in
International Orthopaedics / Issue 11/2023
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-023-05914-7

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