Fig. 2. Elicited responses (○= arousable by shaking and shouting; •= not arousable by shaking and shouting, but does not tolerate laryngoscopy; ▾= tolerates laryngoscopy) at different combinations of propofol and remifentanil. (Top ) Target-controlled infusion (TCI) predictions of propofol and remifentanil concentrations. (Bottom ) Bayesian predictions of propofol and remifentanil.