Table 1.

Penetration Aspiration Scale (PAS)⁴⁶

Score	Interpretation
1	Material does not enter the airway.
2	Material enters the airway, remains above the vocal folds, and is ejected from the airway.
3	Material enters the airway, remains above the vocal folds, and is not ejected from the airway.
4	Material enters the airway, contacts the vocal folds, and is ejected from the airway.
5	Material enters the airway, contacts the vocal folds, and is not ejected from the airway.
6	Material enters the airway, passes below the vocal folds, and is ejected from the airway.
7	Material enters the airway, passes below the vocal folds, and is not ejected from the airway in spite of effort.
8	Material enters the airway, passes below the vocal folds, and no effort is made to eject.