Steady-state distribution volume in physiologic multi-organ systems
β Scribed by Michael Weiss
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- English
- Weight
- 298 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0142-2782
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β¦ Synopsis
Abstract
A unique definition of the apparent volume of distribution at steadyβstate is presented which is consistent with the realistic concept of blood concentration differences within the circulatory system. A physiologically based pharmacokinetic model consisting of eliminating and nonβeliminating organs is used to predict the effect of drug elimination upon the steadyβstate distribution volume.
π SIMILAR VOLUMES
The problem of finding the steady-state volume of distribution V ss for a linear pharmacokinetic system with peripheral drug elimination is considered. A commonly used equation V ss ΒΌ (D/AUC)\*MRT is applicable only for the systems with central (plasma) drug elimination. The following equation, V ss
A consistent account of the assumptions of the well-stirred perfusion limited model leads to the equation for the organ tissue that does not coincide with that often presented in books and papers. The difference in pharmacokinetic profiles calculated by the valid and the commonly used equations coul
The assumption of an instant equilibrium between bound and unbound drug fractions is commonly applied in pharmacokinetic calculations. The equation for the calculation of the steady-state volume of distribution V ss from the time curve of drug concentration in plasma after intravenous bolus dose adm