Optimal doripenem dosing simulations in critically ill nosocomial pneumonia patients with obesity, augmented renal clearance and decreased bacterial susceptibility

Roberts, Jason and Lipman, Jeffrey (2013) Optimal doripenem dosing simulations in critically ill nosocomial pneumonia patients with obesity, augmented renal clearance and decreased bacterial susceptibility. Critical Care Medicine, 41 2: 489-495. doi:10.1097/CCM.0b013e31826ab4c4


Author Roberts, Jason
Lipman, Jeffrey
Title Optimal doripenem dosing simulations in critically ill nosocomial pneumonia patients with obesity, augmented renal clearance and decreased bacterial susceptibility
Journal name Critical Care Medicine   Check publisher's open access policy
ISSN 0090-3493
1530-0293
Publication date 2013-02
Sub-type Article (original research)
DOI 10.1097/CCM.0b013e31826ab4c4
Open Access Status
Volume 41
Issue 2
Start page 489
End page 495
Total pages 7
Place of publication Baltimore, MD, United States
Publisher Lippincott Williams & Wilkins
Collection year 2014
Language eng
Formatted abstract
Objective: Doripenem is a valuable broad-spectrum antibiotic for empirical therapy in critically ill patients, although little data exist to guide effective dosing. We sought to describe the population pharmacokinetics of doripenem in critically ill patients with nosocomial pneumonia and then to use Monte Carlo dosing simulations to procure clinically relevant dosing recommendations for that population.

Design: Pharmacokinetic analysis of Phase III Trial data.

Setting: Critical care units at multiple centers.

Patients: Thirty-one critically ill adult patients with nosocomial pneumonia.

Interventions: Serial blood samples were taken on day 2 or 3 of treatment and used for population pharmacokinetic analysis with nonlinear mixed effects modelling and Monte Carlo simulation.

Measurements and Main Results: A two-compartment linear model was most appropriate. The mean values for doripenem clearance (20.4 +/- 14.2 L/hr) and volume of distribution (45.9 +/- 36.3 L) were larger than that observed in previous studies in noncritically ill patients. Doripenem clearance was correlated with creatinine clearance and peripheral volume of distribution with patient body weight. Administration by extended infusion negated much of the pharmacokinetic variability caused by different patient body weight and renal function and enabled achievement of concentrations associated with maximal bacterial killing.

Conclusions: This is the first article describing the pharmacokinetics/pharmacodynamics of doripenem solely in critically ill patients and emphasizes the effect of patient weight and creatinine clearance on pharmacokinetics. Use of extended infusions with this antibiotic should be encouraged as it maximizes the likelihood of achieving target blood concentrations.
Keyword Doripenem
Population pharmacokinetics
Nosocomial pneumonia
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Medicine Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 29 times in Thomson Reuters Web of Science Article | Citations
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Created: Mon, 17 Dec 2012, 17:07:04 EST by Sia Athanasas on behalf of Anaesthesiology and Critical Care - RBWH