The Knee, ISSN: 1873-5800, Vol: 22, Issue: 1, Page: 56-62
Outcomes of infected revision knee arthroplasty managed by two-stage revision in a tertiary referral centreStammers, John; Kahane, Steven; Ranawat, Vijai; Miles, Jonathan; Pollock, Rob; Carrington, Richard W J; Briggs, Timothy; Skinner, John A
A two-stage revision remains the gold standard to eradicate deep infection in total knee arthroplasty. Higher failure rates are associated with a number of factors including poly-microbial infections, multiresistant organisms and previous operations. The aims are to investigate  the overall success rate of a two-stage revision for infections in TKA,  the outcome of repeat two-stage revisions in recurrent infections and  the factors affecting the outcomes of such cases.
We present the outcomes of a consecutive, retrospective case series of 51 periprosthetic joint infections managed with a two-stage revision knee arthroplasty over a three year period.
Forty-six (90%) of 51 were referred from other hospitals. Infection was successfully eradicated in 24 (65%) of 37 patients undergoing an initial two-stage procedure. Following a failed two-stage revision, a repeat two-stage revision was performed in 19 patients eradicating infection in 8 (42%). A third two-stage was performed in five of these patients eradicating infection in three with an average follow-up of 43 months. Multidrug resistance was present in 69%, and 47% of the patients were infected with multiple organisms. All unsuccessful outcomes involved at least one multidrug-resistant organism compared to 43% in the successful cohort ( P = 0.0002). Serological markers prior to a second-stage procedure were not significantly different between successful and unsuccessful outcome groups.
Single or multiple two-stage revisions can eradicate infection despite previous failed attempts. In this series, failure is associated with multidrug resistance, previous failed attempts to eradicate infection and a less favourable host response.
Level of evidence