Fig. 3From: Effect of intravenous lidocaine on the ED50 of propofol for inserting gastroscope without body movement in adult patients: a randomized, controlled studyResponse of patients with the modifiled Dixon’s up-and-down method in Group C. Responses of 29 consecutive patients in Group C to endoscope insertion and their initial doses of propofol are shown. Arrow indicates the midpoint dose of all independent pairs of patients who manifested crossover from ‘movement’ (○) to ‘no movement’ (●) responsesBack to article page