Abstract
Sonication of explanted devices is well investigated method and was shown to improve the microbiological diagnosis of impant-associated infections by physical removal of bacterial biofilms. Recently, novel approach with chemical agents have been investigated for biofilm dislodgement such as dithiothreitol (DTT). We compared the biofilm dislodgement efficacy of chemical method (dithiothreitol, DTT) compared to the sonication procedure in the diagnosis of prosthetic joint infections (PJI). In a prospective cohort, 187 patients undergoing hip and knee prostheses explantation were included, of whom 94 were assigned for sonication and 93 for DTT group. Sonication showed better sensitivity (73.8%) than DTT (43.2%) for the diagnosis of PJI and comparable specificity (98% and 94.6%, respectively). We concluded that sonication provides a more reliable diagnosis of PJI and detects about 30% more pathogens compared to DTT system. The study was registered at ClinicalTrials.gov (NCT02530229).
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