Fig. 1.
Goodness-of-fit plots of the pharmacokinetic and pharmacodynamic analysis. (A) Alfentanil concentration: measured values (MEAS) versus individual predicted values (IPRED). (B) Alfentanil concentration: individual weighted residuals (IWRES) versus time. (C) Ventilation: measured versus individual predicted values. (D) Ventilation: IWRES versus time. (E) Analgesia: measured versus individual predicted values. (F) Analgesia: IWRES versus time.