INTUBATION
Infections of larynx
Neck mobility abnormalities
Teeth abnormalites (eg poor dentifom, loose and protuberant teeth)
Upper airway abnormalities, strictures, or swellings
Bullsneck deformities
Ankylosing spondylitis
Trauma/ TumourInexperienceOedema of upper airwayNarrowing of lower airway
