External penetrating laryngeal trauma caused by a metal fragment: A Case Report

Table 1 Schaefer-Fuhrman classification of lanryngeal trauma[4,13]

Group	Criteria
Group 1	Minor endolaryngeal hematomas or lacerations; no detectable fracture
Group 2	Edema, hematoma, minor mucosal disruption without exposed cartilage; nondisplaced fracture; varying degrees of airway compromise
Group 3	Massive edema, large mucosal lacerations, exposed cartilage; displaced fracture(s); vocal cord immobility
Group 4	Same as group 3 but more severe with: mucosal disruption; disruption of the anterior commissure; unstable fracture, two or more fracture line
Group 5	Complete laryngotracheal separation