|
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)
|
