• Journal of critical care · Dec 2019

    Subtherapeutic piperacillin concentrations in neurocritical patients.

    • Caroline Damen, Sofie Dhaese, Alain G Verstraete, Veronique Stove, and Jan J De Waele.
    • Department of Critical Care Medicine, Ghent University Hospital, Corneel Heymanslaan 10, 9000 Gent, Belgium; Department of Internal Medicine, Elisabeth Tweesteden Hospital, Doctor Deelenlaan 5, 5042 AD Tilburg, the Netherlands. Electronic address: cmf.damen@etz.nl.
    • J Crit Care. 2019 Dec 1; 54: 48-51.

    PurposeIncreased renal elimination is the leading cause for subtherapeutic concentrations of renally cleared antibiotics and it has been hypothesized that brain damaged patients in the intensive care unit (ICU) are particularly at risk. The objective of this study is to determine the prevalence of subtherapeutic piperacillin concentrations in neurocritical patients and to investigate if having a neurocritical diagnosis is a risk factor for this.Materials And MethodsSingle center retrospective analysis of a prospective cohort study of adult ICU patients receiving continuous infusion piperacillin/tazobactam. Patients were categorized as either having a neurocritical diagnosis or not. An unbound piperacillin concentration > 4× the epidemiologic cut-off value (ECOFF) of Pseudomonas aeruginosa was selected as the PKPD target of choice. Multivariable logistic regression was performed to identify risk factors for subtherapeutic piperacillin concentrations.Results356 patients had a measured creatinine clearance (mCrCl) and matched piperacillin concentration, 52 of which had a neurocritical diagnosis. Subtherapeutic piperacillin concentrations were reported significantly more frequent in neurocritical patients. In multivariate analysis, the only risk factor identified for subtherapeutic piperacillin concentration was an increasing mCrCl.ConclusionSubtherapeutic piperacillin concentrations are common in neurocritical patients yet having a neurocritical admission diagnosis was not identified as an independent risk factor.Copyright © 2019. Published by Elsevier Inc.

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