Σάββατο 15 Δεκεμβρίου 2018

Principles of intravenous drug infusion

Publication date: Available online 15 December 2018

Source: Anaesthesia & Intensive Care Medicine

Author(s): David J. Chambers

Abstract

Intravenous infusions are required when a drug has a short half-life or a narrow therapeutic window. Pharmacokinetic models are employed to calculate the infusion rate for a particular target plasma concentration. While the one-compartment model is based on relatively simple mathematics, it is of little practical use. Multi-compartment models involve complex mathematics: a bolus-infusion regimen requires a variable-infusion rate. In clinical practice, this means incorporating the pharmacokinetic models into specially designed target-controlled infusion pumps. The physicochemical properties of different drugs result in very different behaviours, especially following cessation of intravenous infusion.



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