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  • Title: Blood culture differential time to positivity enables safe catheter retention in suspected catheter-related bloodstream infection: a randomized controlled trial.
    Author: Sabatier C, García X, Ferrer R, Duarte M, Colomina M, Alcaráz D, Fontanals D, Vallés J.
    Journal: Med Intensiva; 2015 Apr; 39(3):135-41. PubMed ID: 24661917.
    Abstract:
    OBJECTIVE: To evaluate the clinical usefulness and safety of the differential-time-to-positivity (DTP) method for managing the suspicion of catheter-related bloodstream infection (CR-BSI) in comparison with a standard method that includes catheter removal in critically ill patients. METHODS-DESIGN: A prospective randomized study was carried out. SETTING: A 16-bed clinical-surgical ICU (July 2007-February 2009). INTERVENTIONS: Patients were randomly assigned to one of two groups at the time CR-BSI was suspected. In the standard group, a standard strategy requiring catheter withdrawal was used to confirm or rule out CR-BSI. In the DTP group, DTP without catheter withdrawal was used to confirm or rule out CR-BSI. MEASUREMENTS: clinical and microbiological data, CR-BSI rates, unnecessary catheter removals, and complications due to new puncture or to delays in catheter removal. RESULTS: Twenty-six patients were analyzed in each group. In the standard group, 6 of 37 suspected episodes of CR-BSI were confirmed and 5 colonizations were diagnosed. In the DTP group, 5 of 26 suspected episodes of CR-BSI were confirmed and four colonizations were diagnosed. In the standard group, all catheters (58/58, 100%) were removed at the time CR-BSA was suspected, whereas in the DTP group, only 13 catheters (13/41, 32%) were removed at diagnosis, and 10 due to persistent septic signs (10/41, 24%). In cases of confirmed CR-BSI, there were no differences between the two groups in the evolution of inflammatory parameters during the 48hours following the suspicion of CR-BSI. CONCLUSIONS: In critically ill patients with suspected CR-BSI, the DTP method makes it possible to keep the central venous catheter in place safely.
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