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  • Title: Impact of tip culture on the management of infected tunneled hemodialysis catheters.
    Author: Cooper ET, Cohen RM, Berns JS, Kornfield ZN, Trerotola SO.
    Journal: J Vasc Interv Radiol; 2007 Oct; 18(10):1227-31. PubMed ID: 17911512.
    Abstract:
    PURPOSE: It is common practice to perform culture of the tip of a catheter when a previously indwelling vascular catheter is removed for presumed infection. This study was conducted to determine the effect of hemodialysis catheter tip cultures (CTCs) on patient management. MATERIALS AND METHODS: Patients whose tunneled hemodialysis catheter (TDC) was removed for infection and who had a CTC between July 2001 and June 2006 were identified. The study sample included 242 patients with 330 catheters (109 men, 133 women). Patients' mean age was 58 years (range, 22-94 y). Catheter tip and blood culture (BC) results obtained during the event leading to catheter removal were recorded. Antimicrobial therapy before and after cultures was recorded. Medical records were reviewed for any indication that the treatment plan was influenced by tip culture results. RESULTS: Of 330 catheters, 134 had positive CTC findings; of these, complete records were available for 52 catheters. The treatment plan for patients with suspected catheter-related bloodstream infection (CRBSI) leading to TDC removal did not change in response to semiquantitative CTC results (51 of 52 patients; 98%). In a single case in which CTC results impacted management, this was because of a delay in processing BCs. Negative CTC findings (n = 108) never changed management (ie, resulted in cessation of antibiotic therapy). Seventy-three percent of patients (n = 38) received empiric antibiotics before any culture results. In these cases, the BC susceptibility profiles confirmed the appropriateness of the initial treatment (n = 10) or led to a change (n = 28). CONCLUSIONS: CTC did not alter management in the treatment of TDC infection. Because CTCs increase costs, their routine use should be abandoned in this population.
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