In vitro suppression of drug-induced methaemoglobin formation by Intralipid(®) in whole human blood: observations relevant to the 'lipid sink theory'.

Autor: Samuels TL;  Research Registrar., Willers JW;  Associate Specialist., Uncles DR;  Consultant., Monteiro R;  CT2 Trainee, Department of Anaesthesia, Worthing Hospital, Worthing, UK., Halloran C;  CT2 Trainee, Department of Anaesthesia, Worthing Hospital, Worthing, UK., Dai H;  Senior Lecturer in Statistics, Brighton University, Brighton, UK.
Jazyk: angličtina
Zdroj: Anaesthesia [Anaesthesia] 2012 Jan; Vol. 67 (1), pp. 23-32. Date of Electronic Publication: 2011 Oct 17.
DOI: 10.1111/j.1365-2044.2011.06914.x
Abstrakt: To provide further evidence for the lipid sink theory, we have developed an in vitro model to assess the effect of Intralipid® 20% on methaemoglobin formation by drugs of varying lipid solubility. Progressively increasing Intralipid concentrations from 4 to 24 mg.ml⁻¹ suppressed methaemoglobin formation by the lipid soluble drug glyceryl trinitrate in a dose-dependent manner (p < 0.001). Both dose and timing of administration of Intralipid to blood previously incubated with glyceryl trinitrate for 10 and 40 min resulted in significant suppression of methaemoglobin formation (p < 0.0001 and p < 0.05, respectively). Mathematical modelling demonstrated that the entire process of methaemoglobin formation by glyceryl trinitrate was slowed down in the presence of Intralipid. Intralipid did not significantly suppress methaemoglobin formation induced by 2-amino-5-hydroxytoluene (partially lipid soluble) or sodium nitrite (lipid insoluble; both p > 0.5). This work may assist determination of the suitability of drugs taken in overdose for which Intralipid might be deployed.
(Anaesthesia © 2011 The Association of Anaesthetists of Great Britain and Ireland.)
Databáze: MEDLINE
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