2014, Number 1
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Enf Infec Microbiol 2014; 34 (1)
Risk factors and mortality associated with mediastinitis in patients undergoing cardiac surgery
González FS, Molina GJ, Villela MLM
Language: Spanish
References: 25
Page: 13-25
PDF size: 215.81 Kb.
ABSTRACT
Background. Mediastinitis is a deep sternal infection, involving tissues or spaces below the subcutaneous tissue, with
a high morbidity and mortality rates.
Material and Methods. A case-control transversal and retrospective study was conducted, from January 2010 to
February 2012, in a regional hospital of the Social Security Mexican Institute (IMSS) to determine the risk factors for the
occurrence of mediastinitis in patients with myocardial revascularization. For the statistical analysis SPSS 19
th version was
used. For the quantitative variables, central tendency and dispersion measurements were determined. For the difference
we used T student. The qualitative variables were evaluated in proportions and differences were sought with X². Variables
≤ 0.1 will be included in a multivariate analysis by Cox hazard ratio with confidence intervals at 95%.
Results. Those variables associated with a diagnosis of mediastinitis vs. no mediastinitis were fever (› 38
°C) (RR 3.38,
95% CI: 2.24 to 4.91, 58% vs. 17%,
p ‹ 0.0001), wound dehiscence (RR 40, 95% CI: 13-125, 70% vs. 2%,
P
‹0.00001),
wound drainage (RR 11.31, 95% CI: 6.45 to 19.84, 79% vs. 7%,
p ‹ 0.0001). Enterobacteria were isolated in more of one
third of the cases. Mortality rate was 53%, bleeding being the first cause of death.
Conclusions. Fever is the best predictor for mediastinitis.
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