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  • Title: Keeping it Simple: Impact of a Restrictive Antibiotic Policy for Ventilator-Associated Pneumonia in Trauma Patients on Incidence and Sensitivities of Causative Pathogens.
    Author: Evans CR, Sharpe JP, Swanson JM, Wood GC, Fabian TC, Croce MA, Magnotti LJ.
    Journal: Surg Infect (Larchmt); 2018 Oct; 19(7):672-678. PubMed ID: 30204541.
    Abstract:
    BACKGROUND: An integral part of ventilator-associated pneumonia (VAP) therapy is the appropriate choice of empiric antibiotics. Our previous experience demonstrated adherence to an empiric therapy pathway was associated with only modest changes in organisms causing VAP. The purpose of the current study was to evaluate the impact of a restrictive antibiotic policy for VAP in trauma patients on the incidence and sensitivities of causative pathogens since the previous study. PATIENTS AND METHODS: Patients with VAP diagnosed on bronchoalveolar lavage since the previous study were stratified by age, gender, mechanism of injury, and injury severity. All patients received empiric antibiotics based on duration of intensive care unit (ICU) stay using a unit-specific pathway. The incidence and sensitivities of causative pathogens in the current study were documented. The adequacy of the VAP pathway was evaluated for all VAP episodes. The current study was then compared with the previous study. RESULTS: Over a 10-year period, 1,474 episodes of VAP were diagnosed with 2,387 causative pathogens isolated. Overall incidence of gram-positive and gram-negative VAP pathogens was unchanged between the study periods. The current study experienced an increase in the incidence of Staphylococcus aureus (23% vs. 17%, p = 0.001) and methicillin-resistant Staphylococcus aureus (10% vs. 6%, p = 0.002) compared with the previous study. The pathway for empiric antibiotics resulted in adequate empiric coverage in 85% of VAP episodes, which was improved compared with the previous study (76%, p = 0.024). Furthermore, despite the increased incidence of early methicillin-resistant Staphylococcus aureus (MRSA) VAP, adequacy of the pathway improved for both the early period (91% vs. 86%, p = 0.001) as well as the late period (86% vs. 63%, p < 0.001) in the current study compared with the previous study. CONCLUSIONS: A comprehensive protocol for the diagnosis and management of VAP, along with antibiotic stewardship, can prevent the development of bacterial resistance to empiric therapy.
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