Table 1 Grading of laryngopharyngeal mucosal damage on endoscopy.

From: Mucosal fluid evaporation is not the method of heat dissipation from fourth-degree laryngopharyngeal burns

Grade

Finding

Grade 0

No injury (absence of hyperemia, edema, blistering)

Grade 1

Minimal hyperemia, edema, and/or blistering, with or without mucus deposit

Grade 2

Moderate hyperemia, edema, and/or blistering, with or without mucus deposit

Grade 3

Severe hyperemia, edema, or patchy areas of paleness, anabrosis, punctuate hemorrhage, with or without mucus deposit

Grade 4

Massive mucosal hyperemia, edema or extensive mucosal paleness, necrosis, sloughing, punctuate hemorrhage, with airway obstruction, with or without mucus deposit

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