Cultures of deep synovial biopsies remain an important tool in diagnosing periprosthetic joint infection, a devastating complication following total hip arthroplasty (THA). Recent reports of unexpected positive intraoperative cultures in aseptic revision arthroplasty, however, challenge the validity and interpretation of these cultures. The aim of this study was to evaluate the contamination risk of synovial biopsy cultures collected intraoperatively during primary THA of healthy subjects.
Synovial biopsies for culture were collected during primary total hip arthroplasty procedures from 100 consecutive cases. The synovial biopsies were taken within the first 15 minutes after skin incision. Biopsy specimen were cultured on 4 different media for 8 or 15 days. Positive cultures were identified using Maldi-Tof spectrometry.
16 cultures yielded a bacterium, suggesting a false positive result of 16%. The mean time for the cultures to become positive was 6.29 days (standard deviation [SD] 3.90) with a maximum of 15 days.
Our study yielded a 16% false positive rate in cultures of synovial biopsy taken during primary total hip arthroplasty of healthy subjects, suggesting that contamination risk of these synovial biopsy cultures may be larger than assumed by clinicians.
Hip Int 2017; 27(6): 595 - 598
Article Type: ORIGINAL RESEARCH ARTICLE
AuthorsChristophe Pattyn, Thomas De Bo, Joris Anthonissen, Philippe Willekens, Geert Claeys, Emmanuel A. Audenaert
- • Accepted on 01/03/2017
- • Available online on 19/07/2017
- • Published in print on 21/11/2017
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- Pattyn, Christophe [PubMed] [Google Scholar] 1, * Corresponding Author (Christophe.firstname.lastname@example.org)
- De Bo, Thomas [PubMed] [Google Scholar] 2
- Anthonissen, Joris [PubMed] [Google Scholar] 1
- Willekens, Philippe [PubMed] [Google Scholar] 1
- Claeys, Geert [PubMed] [Google Scholar] 3
- Audenaert, Emmanuel A. [PubMed] [Google Scholar] 1
Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, Ghent - Belgium
Department of Orthopaedic Surgery and Traumatology, Jan Palfijn Hospital Ghent, Ghent - Belgium
Department of Clinical Chemistry, Microbiology and Immunology, Ghent University Hospital, Ghent - Belgium