inf_tci {tci}

Target-controlled infusion

Description

Apply a TCI algorithm to a set of targets and a 'pkmod' or 'poppkmod' object to calculate infusion rates.

Usage

inf_tci(
  pkmod,
  target_vals,
  target_tms,
  type = c("plasma", "effect"),
  dtm = NULL,
  custom_alg = NULL,
  inittm = 0,
  ignore_pd = FALSE,
  ...
)

Arguments

pkmod

'pkmod' object created by 'pkmod()' or a 'poppkmod' object created by 'poppkmod()'.

target_vals

A vector of numeric values indicating PK or PD targets for TCI algorithm.

target_tms

A vector of numeric values indicating times at which the TCI algorithm should begin targeting each value.

type

Type of TCI algorithm to be used. Options are plasma- or effect-site targeting.

dtm

TCI update frequency. Defaults to 1/6, corresponding to 10-second intervals if model parameters are in terms of minutes.

custom_alg

Custom TCI algorithm to be used instead of default plasma- or effect-site targeting algorithms. The algorithm should be a function that takes minimum arguments 'Ct', 'pkmod', and 'dtm' and returns a single infusion rate. See 'tci_plasma' or 'tci_effect' for examples and vignette on custom models/algorithms for more details.

inittm

Initial time to start TCI algorithm. Cannot be greater than the minimum value of 'target_tms'.

ignore_pd

Logical. Should the PD component of the pkmod object (if present) be ignored. By default, predict.tciinf will assume that 'value' refers to PD targets if a PD model is specified.

...

Arguments passed to TCI algorithm

Examples

# 3-compartment model with effect-site
my_mod <- pkmod(pars_pk = c(v1 = 8.995, v2 = 17.297, v3 = 120.963, cl = 1.382,
q2 = 0.919, q3 = 0.609, ke0 = 1.289))
# plasma targeting
inf_tci(my_mod, target_vals = c(2,3,4,4), target_tms = c(0,2,3,10), "plasma")
# effect-site targeting
inf_tci(my_mod, target_vals = c(2,3,4,4), target_tms = c(0,2,3,10), "effect")
# poppkmod object
data <- data.frame(ID = 1:5, AGE = seq(20,60,by=10), TBW = seq(60,80,by=5),
HGT = seq(150,190,by=10), MALE = c(TRUE,TRUE,FALSE,FALSE,FALSE))
elvd_mod <- poppkmod(data, drug = "ppf", model = "eleveld")
inf_tci(elvd_mod, target_vals = c(2,3,4,4), target_tms = c(0,2,3,10), "effect")