• Andrzej L Dawidowicz, Rafał Kalityński, Jerzy Trocewicz, Andrzej Nestorowicz, Anna Fijałkowska, and Katarzyna Trela-Stachurska.
• Department of Chemical Physics and Physicochemical Separation Methods, Faculty of Chemistry, Maria Curie-Skłodowska University, PL 20-031 Lublin, Maria Curie-Skłodowska Sq. 3, Poland. dawid@hermes.umcs.lublin.pl
• Biomed. Chromatogr. 2002 Oct 1;16(7):455-8.

AbstractOne of the least explored subjects in the research on the metabolism of a widely used anaesthetic, propofol, is its excretion in an unchanged form. According to literature, the estimated percentage of applied propofol eliminated intact via kidneys is lower than 0.3%. The present study shows the amount of propofol excreted in an unchanged form with urine collected during the first 48 h after anaesthesia in five patients undergoing elective intracranial procedures. The drug was concentrated and selectively isolated from urine samples by supported liquid membrane technique and determined by HPLC with fluorescence detection. The amount of unchanged propofol eliminated with urine was approximately (0.004 +/- 0.002)% of the total applied dose. The obtained results may suggest that propofol in an unchanged form is not excreted by kidneys at all provided that all propofol determined in presented study originated from conjugates hydrolysis.Copyright 2002 John Wiley & Sons, Ltd.

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