Figure 6. Effect of laryngescope on laryngeal view. Laryngeal view was assessed by the scheme of Cormack and Lehane: grade 1 = full view, grade 2 = arytenoid cartilages visible only, grade 3 = only epiglottis visible, and grade 4 = epiglottis not visible. The ordinate shows the number of patients with each grade. The dark bars, hatched bars, and stippled bars represent the Macintosh, Miller, and Bullard laryngoscopes, respectively. The 27 patients shown here underwent laryngoscopy with all three laryngoscopes. The eight patients studied with only the Macintosh and Miller laryngoscopes are not included. The laryngeal view with the Bullard laryngoscope was always equal or superior to the view with the other two laryngoscopes. P < 0.01.