httk (version 1.8)

parameterize_1comp: Parameterize_1comp

Description

This function initializes the parameters needed in the function solve_1comp.

Usage

parameterize_1comp(chem.cas=NULL,chem.name=NULL,species="Human",
                    default.to.human=F,adjusted.Funbound.plasma=T,regression=T,
                    restrictive.clearance=T,well.stirred.correction=T,
                    suppress.messages=F)

Arguments

chem.name

Either the chemical name or the CAS number must be specified.

chem.cas

Either the chemical name or the CAS number must be specified.

species

Species desired (either "Rat", "Rabbit", "Dog", "Mouse", or default "Human").

default.to.human

Substitutes missing rat values with human values if true.

adjusted.Funbound.plasma

Uses adjusted Funbound.plasma when set to TRUE along with volume of distribution calculated with this value.

regression

Whether or not to use the regressions in calculating partition coefficients in volume of distribution calculation.

restrictive.clearance

In calculating elimination rate and hepatic bioavailability, protein binding is not taken into account (set to 1) in liver clearance if FALSE.

well.stirred.correction

Uses correction in calculation of hepatic clearance for well-stirred model if TRUE. This assumes clearance relative to amount unbound in whole blood instead of plasma, but converted to use with plasma concentration.

suppress.messages

Whether or not to suppress messages.

Value

Vdist

Volume of distribution, units of L/kg BW.

Fgutabs

Fraction of the oral dose absorbed, i.e. the fraction of the dose that enters the gutlumen.

kelim

Elimination rate, units of 1/h.

hematocrit

Percent volume of red blood cells in the blood.

kgutabs

Rate chemical is absorbed, 1/h.

million.cells.per.gliver

Millions cells per gram of liver tissue.

MW

Molecular Weight, g/mol.

Rblood2plasma

The ratio of the concentration of the chemical in the blood to the concentration in the plasma. Only included for the conversion of plasma outputs.

hepatic.bioavailability

Fraction of dose remaining after first pass clearance, calculated from the corrected well-stirred model.

%% ~Describe the value returned %% If it is a LIST, use %% \item{comp1 }{Description of 'comp1'} %% \item{comp2 }{Description of 'comp2'} %% ...

Examples

# NOT RUN {
 parameters <- parameterize_1comp(chem.name='Bisphenol-A',species='Rat')
 parameters <- parameterize_1comp(chem.cas='80-05-7',restrictive.clearance=FALSE,
                                  species='rabbit',default.to.human=TRUE)
 out <- solve_1comp(parameters=parameters)
# }