Abstract
In contrast to other mathematical concepts used in pharmacokinetics the theory of residence time distributions (RTDs) is independent of a detailed structural model or a particular curve model. In view of the fact that interpretations of RTDs have been mostly based on compartmental models (e. g., [1, 2]), the following shortcomings of this class of structural models should be noted: 1) there is no a priori reason for the existence of homogeneous compartments. The assumption that all elementary subsystems are characterized by exponentially distributed transit times restricts the generality of the approach; 2) the definition of a sampling compartment from which elimination occurs does not allow for a differentiation between sampling upstream or downstream of the elimination site, which leads to inconsistencies in the definition of the volume of distribution, V ss [3].
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Weiss, M. (1991). Residence Time Distributions in Pharmacokinetics: Behavioral and Structural Models. In: D’Argenio, D.Z. (eds) Advanced Methods of Pharmacokinetic and Pharmacodynamic Systems Analysis. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9021-4_9
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