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  • Title: Clinical cure of ventilator-associated pneumonia treated with piperacillin/tazobactam administered by continuous or intermittent infusion.
    Author: Lorente L, Jiménez A, Martín MM, Iribarren JL, Jiménez JJ, Mora ML.
    Journal: Int J Antimicrob Agents; 2009 May; 33(5):464-8. PubMed ID: 19150225.
    Abstract:
    The standard mode of administration of piperacillin treatment is by intermittent infusion. However, continuous infusion may be advantageous as beta-lactam antibiotics exhibit time-dependent antibacterial activity. In previous studies, we found a higher rate of clinical cure of ventilator-associated pneumonia (VAP) by continuous infusion rather than intermittent infusion of meropenem and ceftazidime. Therefore, the objective of this historical cohort study was to establish the clinical efficacy of piperacillin/tazobactam (PIP/TAZ) administered by continuous and intermittent infusion in the treatment of VAP in patients without renal failure. Logistic regression analysis showed a higher probability of clinical cure of VAP by continuous compared with intermittent infusion when the microorganism responsible for VAP had a minimum inhibitory concentration (MIC) of 8 microg/mL [8/9 (88.9%) vs. 6/15 (40.0%); odds ratio (OR)=10.79, 95% confidence interval (CI) 1.01-588.24; P=0.049] or 16 microg/mL [7/8 (87.5%) vs. 1/6 (16.7%); OR=22.89, 95% CI 1.19-1880.78; P=0.03]. Thus, administration of PIP/TAZ by continuous infusion may be considered more effective than intermittent infusion for the treatment of VAP caused by Gram-negative bacteria when the MIC of the microorganism responsible for VAP is 8-16 microg/mL in patients without renal failure.
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