Oral anatomy for intubation

Class 1

Full visibility of tonsils, uvula and soft palate.

Class 2

Visibility of hard and soft palate, upper portion of tonsils and uvula.

Class 3

Soft and hard palate, and base of uvula are visible.

Class 4

Only hard palate visible.


A high Mallampati score (class 4) is associated with more difficult intubation, and a higher incidence of sleep apnea.