Objective: To identify risk factors for recurrent catheter related bloodstream infections (CR-BSIs). The study was undertaken at the University of Utah Hospital and involved patients who had a CR-BSI followed by catheter removal and reinsertion between January 1998 and February 2002.
Design: A retrospective chart review for the cohort study of catheters initially infected, which were then followed to study risk factors for a subsequent infection. Both central line and peripherally inserted central line catheters were included in the study. A recurrent CR-BSI was defined as positive blood cultures after three negative cultures, coupled with positive catheter tip culture or no other evident new source of infection.
Results: Twenty-five (34%) of 73 patients had a recurrent CR-BSI. The first CR-BSI occurred a mean of 20.4 days after catheter insertion whereas recurrence developed a mean of 12.1 days after reinsertion (p = 0.392). Coagulase-negative staphylococci (60%) were the most common cause of recurrent infection. The recurrence was more common among the patients who were given blood product transfusion (hazard ratio (HR) 2.3; confidence interval (CI) 1.02-5.67, p = 0.049). In 20 (27%) patients, catheters were changed over a guidewire. The guidewire catheter exchange was not found to be associated with an increased risk of recurrent infection (p = 0.582).
Conclusion: Catheter replacement to a new site, instead of rewiring, was not shown to decrease the risk for recurrent infection. The transfusion of blood products was associated with an increased risk for recurrent infection.
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