A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 5/00 (2006.01) A61K 9/00 (2006.01) G06F 19/00 (2006.01)
Patent
CA 2173821
Method for determining a particular characteristic value of an effect compartment, such as the exit rate constant, after administration of a drug to a central compartment coupled to the effect compartment. Drug concentrations in the effect compartment are ascertained as a function of the exit rate constant, and a measured effect of the drug is obtained. A hysteresis loop between the drug concentrations in the effect compartment and the measured effect is graphically formed, and the hysteresis loop is collapsed by varying the exit rate constant of the effect compartment. A pharmacodynamic model which fits the curve of the collapsed hysteresis loop is selected, and a predicted effect is obtained in accordance with the selected pharmacodynamic model and the drug concentrations in the effect compartment. An error between the predicted effect and the measured effect is calculated, and the exit rate constant of the effect compartment is then adjusted until the calculated error between the predicted effect and the measured effect is minimized, thus obtaining the exit rate constant of the effect compartment. A dosing regimen for the drug is then designed in accordance with the exit rate constant at which the calculated error is minimized.
Bereskin & Parr
Hoechst Marion Roussel Inc.
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