Figure 2.
Lateral neck radiograph during direct laryngoscopy. AH, axis of handle; OS, axis of maxillary molars' occlusal surface; â1, angle between AH and horizontal plane; â2, angle between occlusal surface and horizontal plane, â3, angle of laryngoscope blade levering motion.
Mentzelopoulos et al. Critical Care 1999 3(Suppl 1):P007 doi:10.1186/cc382