Table 1. Schaefer Classification System for Laryngeal Injuries.

Type of Injury	Classification System of Schaefer for Laryngeal Injuries
1	Minor hematoma of endolarynx or fracture less laceration
2	Extreme edema, hematoma, a fracture that is not dislocated or break in the mucosa in which cartilage is not exposed
3	Extensive edema, extensive break in the mucosa, dislocated fractures or immobility of vocal cord, exposed cartilage
4	Serious interruption of the anterior larynx, unsteady fractures, fracture lines, and severe trauma of mucosa
5	Total isolation of trachea and larynx [13]