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2011, Number 3

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Rev Mex Patol Clin Med Lab 2011; 58 (3)

Is the culture of vascular catheter useful in patients with no data of bloodstream infection?

Morán E, Arreguín V, Macías JH, Álvarez JA, Mosqueda JL, Muñoz JM

Language: Spanish
References: 11
Page: 138-143
PDF size: 234.42 Kb.


ABSTRACT

Background: Catheter-related bloodstream infections are severe nosocomial infections. The main organisms reported in the literature are Gram-positive cocci (mainly coagulase-negative staphylococci). Objective: To determine the utility values of central vascular catheter cultures in asymptomatic patients, the incidence of contamination, the organisms isolated, and the factors associated with contamination. Methods: Cross sectional study. Central vascular catheters were cultured by the method of bearing (Maki’s technique). Biochemical methods were used for microbial identification. Results: Overall, 167 catheters were analyzed. The rate of contamination of catheters in patients without suspicion of infection was 19% (95% Confidence Interval, 10-27%) and in patients under suspicion it was 29% (95%CI, 19-38%). The culture’s utility values in patients without suspicion of infection showed a sensitivity of 0.29 and specificity 0.81. Gram-negative bacilli predominated (57%). The time length of catheterization was related to the frequency of contamination. Conclusions: Routine catheter culture has poor utility values as a diagnostic test but may be of epidemiological use as a sentinel of the care with which they are manipulated.


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