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A model for procalcitonin concentrations following birth in non infected preterm neonates

Background: Procalcitonin (PCT) may be used to monitor infection and guide antibiotic therapy (1). However its usefulness in neonates is hampered due to changes following birth and events such as surgery. Methods: PCT concentrations measured in 282 non-infected pre-term and term neonates (22 and 41 weeks gestation) were provided for analysis (2). A turnover model was […]

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Matters close to the heart: adaptation of tacrolimus models to inform therapeutic drug monitoring using the PRIOR approach

Introduction. External evaluation of published tacrolimus population pharmacokinetic models (n=17) highlighted that no available model accurately describes tacrolimus disposition in heart transplant (HTX) recipients, both with and without concomitant azole antifungal therapy.1 Concomitant azole antifungal therapy alters tacrolimus disposition substantially necessitating dose adjustments. The incorporation of azole antifungal use as a covariate may improve model-predicted […]

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A Universal Pharmacokinetic Model for Dexmedetomidine in Children and Adults

A universal pharmacokinetic model was developed from pooled paediatric and adult data (40.6 postmenstrual weeks, 70.8 years, 3.1-152 kg). A three-compartment pharmacokinetic model with first-order elimination was superior to a two-compartment model to describe these pooled dexmedetomidine data. Population parameter estimates (population parameter variability %) were clearance (CL) 0.9 L/min/70 kg (36); intercompartmental clearances (Q2) […]

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Modeling of The Relationship Between Ustekinumab Exposure, Fecal Calprotectin and Endoscopic Outcomes in Patients with Crohn’s Disease

Background: Ustekinumab is approved for the treatment of patients with moderate-to-severe Crohn’s disease (CD) and ulcerative colitis. In the UNITI endoscopy sub-study, only 17.4% of patients on ustekinumab achieved endoscopic response and 10.9% of patients achieved endoscopic remission at week 44 (w44).1 Aims: We aimed to investigate if improved endoscopic outcomes could be achieved through dose optimization […]

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External Evaluation of Vancomycin Models

Introduction Current clinical evidence supports area under the concentration-time curve (AUC) rather than trough concentrations as a more rational target for vancomycin therapy (1). In mid-2019 practice at Auckland District Health Board Hospitals transitioned from trough concentration to AUC guided dosing supported by Bayesian forecasting using the GAVamycin model implemented in NextDose (www.nextdose.org). To support […]

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