Table 1 Bronchoscopic criteria used to grade inhalation injury

Grade 0 (No Injury):

Absence of carbonaceous deposits, erythema, edema, bronchorrhea, or obstruction.

Grade 1 (Mild Injury):

Minor or patchy areas of erythema, carbonaceous deposits in proximal or distal bronchi. [any or combination]

Grade 2 (Moderate Injury):

Moderate degree of erythema, carbonaceous deposits, bronchorrhea, with or without compromise of the bronchi.

[any or combination]

Grade 3 (Severe Injury):

Severe inflammation with friability, copious carbonaceous deposits, bronchorrhea, bronchial obstruction.

[any or combination]

Grade 4 (Massive Injury):

Evidence of mucosal sloughing, necrosis, endoluminal obliteration. [any or combination]