Objective
This study aimed to characterize the demographics, microbiology, management and treatment outcomes of mediastinitis according to the origin of the infection.
Methods
This retrospective observational study enrolled patients diagnosed with mediastinitis according to the criteria defined by the Centers for Disease Control and prevention, who were treated in Strasbourg University Hospital, France between January 1st, 2010 and December 31st, 2020.
Results
We investigated 151 cases, including 63 post-sternotomy mediastinitis (PSM), 60 cases of mediastinitis due to esophageal perforation (MEP) and 17 cases of descending necrotizing mediastinitis (DNM). Mean age was 63 ± 14.5 years old and 109/151 were male. Microbiological documentation varied according to the origin of the infection. When documented, cases with PSM were mostly monomicrobial (36/53, 67.9%) and involved staphylococci (36/53, 67.9%), whereas cases with MEP and DNM were mostly plurimicrobial (38/48, 79.2% and 8/12, 66.7%, respectively) and involved digestive or oral flora microorganisms, respectively. The median duration of anti-infective treatment was 41 days (interquartile range: 21–56), and 122/151 (80.8%) patients benefited from early surgical management. The overall 1-year survival was estimated to be 64.8% (95% CI; 56.6%–74.3%), but varied from 80.1% for DNM to 61.5% for MEP.
Conclusion
Mediastinitis represents a rare yet deadly infection. The present cohort study exhibited the different patterns observed according to the origin of the infection. Greater insight and knowledge on these differences may help guide the management of these complex infections, especially with respect to empirical anti-infective treatments.