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a Department of Cardio-Vascular and Thoracic Surgery, Cliniques Universitaires Saint-Luc, Catholic University of Louvain, Belgium
b Department of Infectious Diseases, Cliniques Universitaires Saint-Luc, Catholic University of Louvain, Belgium
c Department of Plastic and Reconstructive Surgery, Cliniques Universitaires Saint-Luc, Catholic University of Louvain, Belgium
Received 4 June 2007; received in revised form 21 November 2007; accepted 22 November 2007.
* Corresponding author. Address: Cardio-Vascular and Thoracic Surgery Unit, Cliniques universitaires St-Luc, Université catholique de Louvain, Avenue Hippocrate 10, B-1200 Brussels, Belgium. Tel.: +32 2 7646107; fax: +32 2 7648960. (Email: poncelet{at}chir.ucl.ac.be).
Objectives: To evaluate a simple treatment algorithm in sternal wound infection (SWI) allowing for primary closure and to describe the different surgical techniques and their associated morbidity and mortality. Methods: A retrospective analysis of all patients operated on between 1996 and 2004 in a single tertiary care institution. All epidemiological and surgical data were prospectively collected in our database. Univariate and multivariate analysis were used to determine preoperative and perioperative risks factors for 90-day and long-term mortality. Results: Out of 5905 procedures, 146 sternal wound infections were documented (2.4%). The respective incidence of SWI for CABG, isolated valve, or combined procedures were 2.8%, 1.1%, and 3.2%. Pathogens involved were S. epidermidis (44.5%), S. aureus (31.5%), and gram-negative rods (19.2%). Re-operation was required in 131/146 patients. Mean time to the first re-operation was 17.3 ± 12 days. Modalities of treatment consisted of drainage alone (44 patients), rewiring (25 patients), debridement, rewiring and mediastinal lavage (52 patients), and partial/complete sternal resection (10 patients). Additional procedures were required in 49 patients (37.7%). The 90-day mortality for uninfected patients and patients with superficial SWI were 4.4% and 2.8% (p = 0.78) whereas for patients with deep SWI, 90-day mortality was 14.5% (DSWI vs others, p < 0.0001). Conclusions: Deep sternal wound infection (DSWI) remains a dreadful complication in contemporary cardiac surgery while risk factors are currently well defined. Using a simple approach of primary closure together with liberal use of vascularized flaps has allowed us to achieve satisfactory short-term outcome in this subset of patients.
Key Words: Surgery cardiothoracic Bypass coronary surgery Mediastinitis Decision making
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