RT Journal Article SR Electronic T1 Mechanisms of lidocaine kinetics in the isolated perfused rat liver. III. Evaluation of liver models for time-dependent behavior. JF Drug Metabolism and Disposition JO Drug Metab Dispos FD American Society for Pharmacology and Experimental Therapeutics SP 22 OP 26 VO 15 IS 1 A1 M R Gray A1 B A Saville A1 Y K Tam YR 1987 UL http://dmd.aspetjournals.org/content/15/1/22.abstract AB Three models for the elimination of lidocaine in the isolated perfused rat liver were used to simulate the time course of both lidocaine and its metabolites in a single-pass perfusion system: well stirred, parallel tube, and a two-compartment model to test the effects of enzyme heterogeneity. All models included multiple enzymes and multiple metabolic pathways, as well as varying degrees of tissue binding. Although the well stirred and parallel tube models gave qualitatively different results, neither model predicted that the concentration of monoethylglycinexylidide would pass through a maximum and then decline to a lower steady state value, as observed in continuous perfusion experiments. Although each of the three models tested would give reasonable agreement with steady state observations, the test of the time-dependent behavior of both lidocaine and monoethylglycinexylidide was more discriminating. Each model gave characteristic predictions for the time course of the metabolites.