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Clinical cure of ventilator-associated pneumonia treated with piperacillin/tazobactam administered by continuous or

Leonardo Lorente1, Alejandro Jiménez, María M Martín

  • 1Intensive Care Unit, Hospital Universitario de Canarias, Ofra s/n, La Cuesta, La Laguna 38320, Tenerife, Spain. lorentemartin@msn.com

International Journal of Antimicrobial Agents
|January 20, 2009
PubMed

Insights

Continuous infusion of piperacillin/tazobactam (PIP/TAZ) demonstrated higher clinical cure rates for ventilator-associated pneumonia (VAP) compared to intermittent infusion, especially for Gram-negative bacteria with specific minimum inhibitory concentrations.

Area of Science:

  • Pharmacology
  • Infectious Diseases
  • Critical Care Medicine

Background:

  • Piperacillin/tazobactam (PIP/TAZ) is commonly administered via intermittent infusion for bacterial infections.
  • Beta-lactam antibiotics, including PIP/TAZ, exhibit time-dependent activity, suggesting continuous infusion may improve efficacy.
  • Previous studies indicated superior outcomes with continuous infusion of other beta-lactams for ventilator-associated pneumonia (VAP).

Purpose of the Study:

  • To compare the clinical efficacy of continuous versus intermittent infusion of PIP/TAZ in treating VAP.
  • To evaluate the impact of minimum inhibitory concentration (MIC) on treatment outcomes.
  • To assess efficacy in patients without renal failure.

Main Methods:

  • Historical cohort study design.
  • Analysis of clinical cure rates for VAP patients treated with PIP/TAZ via continuous or intermittent infusion.
  • Logistic regression analysis to determine the association between infusion method, MIC, and clinical cure.

Main Results:

  • Continuous infusion showed a significantly higher probability of clinical cure for VAP when the causative microorganism had an MIC of 8 or 16 microg/mL.
  • Odds ratios favored continuous infusion, particularly at higher MICs (OR=10.79 for MIC 8, OR=22.89 for MIC 16).
  • Treatment success rates were substantially higher with continuous infusion (88.9% vs. 40.0% for MIC 8; 87.5% vs. 16.7% for MIC 16).

Conclusions:

  • Continuous infusion of PIP/TAZ may be more effective than intermittent infusion for treating VAP caused by Gram-negative bacteria with MICs of 8-16 microg/mL in non-renal failure patients.
  • Optimizing antibiotic administration strategies, such as continuous infusion, can improve VAP treatment outcomes.
  • Further research may explore the role of pharmacokinetic/pharmacodynamic optimization in VAP management.

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