Anne M Masich1, Mojdeh S Heavner1, Jeffrey P Gonzales1, Kimberly C Claeys2. 1. Department of Pharmacy Practice and Science, University of Maryland School of Pharmacy, Baltimore, Maryland, USA. 2. Department of Pharmacy Practice and Science, University of Maryland School of Pharmacy, Baltimore, Maryland, USA. kclaeys@rx.umaryland.edu.
Abstract
PURPOSE OF REVIEW: Beta-lactam antibiotics are commonly prescribed in critically ill patients for a variety of infectious conditions. Our understanding of how critical illness alters beta-lactam pharmacokinetics/pharmacodynamics (PK/PD) is rapidly evolving. RECENT FINDINGS: There is a growing body of literature in adult patients demonstrating that physiological alterations occurring in critically ill patients may limit our ability to optimally dose beta-lactam antibiotics to reach these PK/PD targets. These alterations include changes in volume of distribution and renal clearance with multiple, often overlapping causative pathways, including hypoalbuminemia, renal replacement therapy, and extracorporeal membrane oxygenation. Strategies to overcome these PK alterations include extended infusions and therapeutic drug monitoring. Combined data has demonstrated a possible survival benefit associated with extending beta-lactam infusions in critically ill adult patients. This review highlights research on physiological derangements affecting beta-lactam concentrations and strategies to optimize beta-lactam PK/PD in critically ill adults.
PURPOSE OF REVIEW: Beta-lactam antibiotics are commonly prescribed in critically illpatients for a variety of infectious conditions. Our understanding of how critical illness alters beta-lactam pharmacokinetics/pharmacodynamics (PK/PD) is rapidly evolving. RECENT FINDINGS: There is a growing body of literature in adult patients demonstrating that physiological alterations occurring in critically illpatients may limit our ability to optimally dose beta-lactam antibiotics to reach these PK/PD targets. These alterations include changes in volume of distribution and renal clearance with multiple, often overlapping causative pathways, including hypoalbuminemia, renal replacement therapy, and extracorporeal membrane oxygenation. Strategies to overcome these PK alterations include extended infusions and therapeutic drug monitoring. Combined data has demonstrated a possible survival benefit associated with extending beta-lactam infusions in critically ill adult patients. This review highlights research on physiological derangements affecting beta-lactam concentrations and strategies to optimize beta-lactam PK/PD in critically ill adults.
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