Pharmacokinetics of propofol in children
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The pharmacokinetics of propofol were studied in 12 healthy Chinese children, aged 4-12 yr, undergoing circumcision under inhalation anaesthesia and the mean ratio of k31:k10 suggests that lipophilicity constrains return of the drug to the central compartment.Abstract:
The pharmacokinetics of propofol were studied in 12 healthy Chinese children, aged 4–12 yr, undergoing circumcision under inhalation an-aesthesia. All patients received a single i.v. bolus dose of propofol 2.5 mg kg−1 and blood concentrations of propofol over the subsequent 24 h were measured using high pressure liquid chromatography with fluorimetric detection. Data were consistent with a three-compartment model with a mean (SEM) elimination half-life of 209 (29) min and total body clearance of 40.4 (3.6) ml min−1 kg−1. The mean (SEM) apparent volume of distribution at steady state was 5.0 (2.7) litre kg−1 and volume of the central compartment was 0.6 (0.1) litre kg−1. The mean (SEM) ratio of k12: k21 was 1.4 (0.2), suggesting that, after injection of a single bolus dose in children, propofol is distributed rapidly to the shallow compartment. The mean ratio of k31: k10 suggests that lipophilicity constrains return of the drug to the central compartment.read more
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Pharmacokinetic model driven infusion of propofol in children
TL;DR: A computer controlled infusion device for propofol was used to induce and maintain general anaesthesia in 20 children undergoing minor surgical procedures and it was found that the values obtained were systematically overpredicted by the delivery system algorithm.
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Population pharmacokinetics of propofol: a multicenter study.
Jürgen Schüttler,Harald Ihmsen +1 more
TL;DR: Adjusting pharmacokinetics to the individual patient should improve the precision of target-controlled infusion and may help to broaden the field of application for target- controlled infusion systems.
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Propofol. An update of its use in anaesthesia and conscious sedation.
TL;DR: Accumulating clinical experience in cardiac and neurosurgery suggests that the full potential of propofol has yet to be realised, and the relative benefits of prop ofol compared with the newer volatile agents (desflurane and sevoflurane) and Propofol/volatile agent combinations need to be examined in this clinical setting.
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The use of propofol infusions in paediatric anaesthesia: a practical guide
TL;DR: Children require higher infusion rates than adults to maintain steady state concentrations of 3 μg·ml−1 and have longer context sensitive half‐times than adults and these differences can be attributed to altered pharmacokinetics in this age group.
Journal ArticleDOI
Inter-individual Variability in Propofol Pharmacokinetics in Preterm and Term Neonates
Karel Allegaert,Mariska Y. M. Peeters,René Verbesselt,Dick Tibboel,Gunnar Naulaers,J.N. de Hoon,Catherijne A. J. Knibbe +6 more
TL;DR: PMA and PNA contribute to the inter-individual variability of propofol clearance with very fast maturation of clearance in neonatal life and implicates that preterm neonates and neonates in the first week of postnatal life are at an increased risk for accumulation during either intermittent bolus or continuous administration of prop ofol.