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  • Title: Negative impact of prior debridement on functional outcome of subsequent two-stage revision for early knee periprosthetic infection.
    Author: Lizaur-Utrilla A, Asensio-Pascual A, Gonzalez-Parreño S, Miralles-Muñoz FA, Lopez-Prats FA.
    Journal: Knee Surg Sports Traumatol Arthrosc; 2019 Jul; 27(7):2309-2315. PubMed ID: 30887067.
    Abstract:
    PURPOSE: To compare the functional outcome of two-stage revision (2SR) in patients without a prior debridement, antibiotics and implant retention with those patients who underwent 2SR after a failed debridement, antibiotics and implant retention for early periprosthetic joint infection following total knee arthroplasty (TKA). Negative impact of prior failed debridement, antibiotics and implant retention on the functional outcome of subsequent 2SR was hypothesized. METHODS: Case-control study of 49 patients initially treated with 2SR (group A) and 43 treated with 2SR after a prior failed debridement, antibiotics and implant retention (group B). Functional outcome was assessed by the Knee Society Scores (KSS) and Western Ontario and McMaster Universities (WOMAC) questionnaire. Range of motion (ROM) of the knee was also measured. RESULTS: The median follow-up was 4.1 (range 3-7) years. At final follow-up, KSS-knee (p = 0.001), KSS-function (p = 0.002), WOMAC-function (p = 0.022) and ROM (p = 0.002) were significantly better in the group A as compared to the group B. There was no significant difference between groups in the WOMAC-pain score (p = 0.597). In multivariate analysis, BMI < 30 (OR 3.1, 95% CI 1.7-4.9, p = 0.026), non- Staphylococcus causative microorganism (OR 2.7, 95% CI 1.6-5.9, p = 0.037), and 2SR procedure (OR 2.4, 95% CI 1.7-5.2, p = 0.018) were significant predictors of successful functional outcome. CONCLUSIONS: A prior debridement, antibiotics and implant retention has been shown to have a negative impact on the functional outcome of a subsequent 2SR. These findings suggest that treatment with debridement, antibiotics and implant retention for early periprosthetic infection should only be used in selected patients, and the first option in those patients with Staphylococcus organisms should be 2SR. LEVEL OF EVIDENCE: IV.
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