Figure 3From: Pupillary reflex measurement predicts insufficient analgesia before endotracheal suctioning in critically ill patientsComparison of the pupil diameter variation assessed after a 10, 20 or 40 mA tetanic stimulation during 40 measurements in 34 critically ill patients with adequate or insufficient analgesia. Insufficient analgesia was defined by an increase ≥1 on the Behavioral Pain Scale (A) or on the Richmond Agitation Sedation Scale (B).Back to article page