Abstract
BackgroundWe aimed to determine risk factors associated with rates of contaminated blood cultures in the emergency department (ED). MethodsThis single-center, cohort study of 1098 consecutive patients ≥ 20 years of age was performed in the ED of university hospital over a 26-month period. ResultsWe analyzed 2096 pairs of blood cultures. Potential contamination was identified in 172 (8.2%) of the 2096 pairs of blood cultures. Multivariate analysis revealed more frequent contamination when puncture sites were disinfected with povidone-iodine (PVI) than with alcohol/chlorhexidine gluconate (adjusted odds ratio, 7.13; 95% confidence interval [CI], 4.8–10.7; P < 0.001). Femoral and central venous catheters showed more frequent contamination than peripheral venous sites. Blood collection by first- or second-year residents did not show an increase in contaminated blood cultures. ConclusionsRates of contaminated blood cultures were significantly associated with PVI and specific sites, but were not significantly associated with blood collection by residents.
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