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  • Title: Electronic antibiotic stewardship--reduced consumption of broad-spectrum antibiotics using a computerized antimicrobial approval system in a hospital setting.
    Author: Buising KL, Thursky KA, Robertson MB, Black JF, Street AC, Richards MJ, Brown GV.
    Journal: J Antimicrob Chemother; 2008 Sep; 62(3):608-16. PubMed ID: 18550680.
    Abstract:
    OBJECTIVES: Antibiotic stewardship is important, but the ideal strategy for providing stewardship in a hospital setting is unknown. A practical, sustainable and transferable strategy is needed. This study evaluates the impact of a novel computerized antimicrobial approval system on antibiotic-prescribing behaviour in a hospital. Effects on drug consumption, antibiotic resistance patterns of local bacteria and patient outcomes were monitored. METHODS: The study was conducted at a tertiary referral teaching hospital in Melbourne, Australia. The system was deployed in January 2005 and guided the use of 28 restricted antimicrobials. Data were collected over 7 years: 5 years before and 2 years after deployment. Uptake of the system was evaluated using an in-built audit trail. Drug utilization was prospectively monitored using pharmacy data (as defined daily doses per 1000 bed-days) and analysed via time-series analysis with segmental linear regression. Antibiograms of local bacteria were prospectively evaluated. In-hospital mortality and length of stay for patients with Gram-negative bacteraemia were also reported. RESULTS: Between 250 and 300 approvals were registered per month during 2006. The gradients in the use of third- and fourth-generation cephalosporins (+0.52, -0.05, -0.39; P < 0.01), glycopeptides (+0.27, -0.53; P = 0.09), carbapenems (+0.12, -0.24; P = 0.21), aminoglycosides (+0.15, -0.27; P < 0.01) and quinolones (+0.76, +0.11; P = 0.08) all fell after deployment, while extended-spectrum penicillin use increased. Trends in increased susceptibility of Staphylococcus aureus to methicillin and improved susceptibility of Pseudomonas spp. to many antibiotics were observed. No increase in adverse outcomes for patients with Gram-negative bacteraemia was observed. CONCLUSIONS: The system was successfully adopted and significant changes in antimicrobial usage were demonstrated.
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