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. 2012 Jan;36(1):65-71.
doi: 10.1007/s00264-011-1267-x. Epub 2011 May 7.

Reinfection after two-stage revision for periprosthetic infection of total knee arthroplasty

Bernd Kubista  1 , Robert U Hartzler, Christina M Wood, Douglas R Osmon, Arlen D Hanssen, David G Lewallen
Affiliations

Reinfection after two-stage revision for periprosthetic infection of total knee arthroplasty

Bernd Kubista et al. Int Orthop. 2012 Jan.

Abstract

Purpose: Limited data exist regarding the long-term results or risk factors for failure after two-stage reimplantation for periprosthetic knee infection. The purpose of this retrospective review was to investigate infection-free implant survival and identify variables associated with reinfection after this procedure. Furthermore, a staging system was evaluated as a possible prognostic tool for patients undergoing two-stage reimplantation of infected total knee arthroplasty (TKA).

Methods: In this level II, retrospective prognostic study, 368 patients with infected TKA treated with a two-stage revision protocol at our institution between 1998 and 2006 were reviewed. Patients who developed recurrent infection and an equal number of patients randomly selected for the control group were analysed for risk factors associated with treatment failure.

Results: At the most recent follow-up, 58 (15.8%) patients had developed reinfection after the two-stage reimplantation. The median time to reinfection was 1,303 days (3.6 years), with follow-up time ranging from six to 2,853 days (7.8 years). The strongest positive predictors of treatment failure included chronic lymphoedema [hazard ratio (HR) = 2.28, 95% confidence interval (CI) 1.16-4.48; p = 0.02),and revision between resection and definitive reimplantation (HR = 2.13, 95% CI 1.20-3.79; p = 0.01, whereas patients treated with intravenously administered Cefazolin had a significant reduction in recurrent infection rate (HR = 0.48, 95% CI 0.25-0.90; p = 0.02).

Conclusions: Our findings should be of help in counselling patients regarding their prognosis when faced with two-stage exchange for infected TKA and provide a basis for future comparisons.

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Figures

Fig. 1
Fig. 1
Kaplan–Meier curve demonstrating survival time to treatment failure among 368 patients with infected total knee arthroplasty (TKA) treated with two-stage revision protocol at a single institution from January 1998 through December 2006
See this image and copyright information in PMC

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