Comparison of predicted and real propofol and remifentanil concentrations in plasma and brain tissue during target-controlled infusion: a prospective observational study.
Marsh propofol model
Minto remifentanil model
brain concentrations
target-controlled infusion
Journal
Anaesthesia
ISSN: 1365-2044
Titre abrégé: Anaesthesia
Pays: England
ID NLM: 0370524
Informations de publication
Date de publication:
12 2020
12 2020
Historique:
accepted:
02
05
2020
pubmed:
9
6
2020
medline:
25
11
2020
entrez:
8
6
2020
Statut:
ppublish
Résumé
Target-controlled infusion systems are increasingly used to administer intravenous anaesthetic drugs to achieve a user-specified plasma or effect-site target concentration. While several studies have investigated the ability of the underlying pharmacokinetic-dynamic models to predict plasma concentrations, there are no data on their performance in predicting drug concentrations in the human brain. We assessed the predictive performance of the Marsh propofol model and Minto remifentanil model for plasma and brain tissue concentrations. Plasma samples were obtained during neurosurgery from 38 patients, and brain tissue samples from nine patients. Propofol and remifentanil concentrations were measured using gas chromatography mass spectrometry and liquid chromatography tandem mass spectrometry. Data were analysed from the nine patients in whom both plasma and brain samples were simultaneously obtained. For the Minto model (five patients), the median performance error was 72% for plasma and -14% for brain tissue concentration predictions. The model tended to underestimate plasma remifentanil concentrations, and to overestimate brain tissue remifentanil concentrations. For the Marsh model (five patients), the median prediction errors for plasma and brain tissue concentrations were 12% and 81%, respectively. However, when the data from all blood propofol assays (36 patients) were analysed, the median prediction error was 11%, with overprediction in 15 (42%) patients and underprediction in 21 (58%). These findings confirm earlier reports demonstrating inaccuracy for commonly used pharmacokinetic-dynamic models for plasma concentrations and extend these findings to the prediction of effect-site concentrations.
Substances chimiques
Remifentanil
P10582JYYK
Propofol
YI7VU623SF
Types de publication
Comparative Study
Journal Article
Observational Study
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1626-1634Subventions
Organisme : Fonds Wetenschappelijk Onderzoek
ID : 1S87720N
Pays : International
Organisme : Clinical Research and Education Council (KOOR) of UZ Leuven
Pays : International
Commentaires et corrections
Type : CommentIn
Informations de copyright
© 2020 Association of Anaesthetists.
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