Impact of Positive Cultures during the Second Stage of a 2-Stage Replacement. Systematic Review. Protocol

Arthroplasty replacement surgery is one of the most performed surgeries in the field of orthopaedics. Infection is one of the most serious complications in arthroplastic surgery. The incidence of periprosthetic joint infection (PJI) varies according to the joint. In primary TKA, it ranges from 1% to 2%, increasing to 10% in revision surgery. This complication involves both high economic costs and health resources allocation, and lots of suffering. PJI studies have increased exponentially over the last two decades, with different consensus being reached to assure the best possible treatment. Two-stage replacement is a frequently performed procedure in patients with chronic PJI. However, results in the literature after this procedure differ, ranging from 54% to 100% of infection eradication. Positive cultures at the moment of reimplantation, when performing the second stage, are perceived as a risk factor for reinfection. This project aims to determine the impact of positive cultures during the second stage on the outcome of patients undergoing a 2-stage septic replacement

Clinical outcome and risk factors for failure in late acute prosthetic joint infections treated with debridement and implant retention

Objectives: Debridement, antibiotics and implant retention (DAIR) is the recommended treatment for all acute prosthetic joint infections (PJI), but its efficacy in patients with late acute (LA) PJI is not well described. Methods: Patients diagnosed with LA PJI between 2005 and 2015 were retrospectively evaluated. LA PJI was defined as the development of acute symptoms (= 3 months after arthroplasty. Failure was defined as: (i) the need for implant removal, (ii) infection related death, (iii) the need for suppressive antibiotic therapy and/or (iv) relapse or reinfection during follow-up. Results: 340 patients from 27 centers were included. The overall failure rate was 45.0% (153/340). Failure was dominated by Staphylococcus aureus PJI (54.7%, 76/139). Significant independent preoperative risk factors for failure according to the multivariate analysis were: fracture as indication for the prosthesis (odds ratio (OR) 5.4), rheumatoid arthritis (OR 5.1), age above 80 years (OR 2.6), male gender (OR 2.0) and C-reactive protein > 150 mg/L (OR 2.0). Exchanging the mobile components during DAIR was the strongest predictor for treatment success (OR 0.35). Conclusion: LA PJIs have a high failure rate. Treatment strategies should be individualized according to patient's age, comorbidity, clinical presentation and microorganism causing the infection. (C) 2018 The British Infection Association. Published by Elsevier Ltd. All rights reserved.Peer reviewe

Timing of implant-removal in late acute periprosthetic joint infection:A multicenter observational study

Objectives: We evaluated the treatment outcome in late acute (LA) periprosthetic joint infections (PJI) treated with debridement and implant retention (DAIR) versus implant removal. Methods: In a large multicenter study, LA PJIs of the hip and knee were retrospectively evaluated. Failure was defined as: PJI related death, prosthesis removal or the need for suppressive antibiotic therapy. LA PJI was defined as acute symptoms Results: 445 patients were included, comprising 340 cases treated with DAIR and 105 cases treated with implant removal (19% one-stage revision (n = 20), 74.3% two-stage revision (n = 78) and 6.7% definitive implant removal (n = 7). Overall failure in patients treated with DAIR was 45.0% (153/340) compared to 24.8% (26/105) for implant removal (p = 3 (OR 2.9), PJI caused by S. aureus (OR 1.8) and implant retention (OR 3.1) were independent predictors for failure in the multivariate analysis. Conclusion: DAIR is a viable surgical treatment for most patients with LA PJI, but implant removal should be considered in a subset of patients, especially in those with a CRIME80-score >= 3. (C) 2019 The British Infection Association. Published by Elsevier Ltd. All rights reserved