| Groups |
Severity of injury in ascending order |
| Group 1 |
Minor endolaryngeal hematomas or lacerations without detectable fractures |
| Group 2 |
More severe edema, hematoma, minor mucosal disruption without exposed cartilage, or nondisplaced fractures |
| Group 3 |
Massive edema, large mucosal lacerations, exposed cartilage, displaced fractures, or vocal cord immobility. |
| Group 4 |
Same as group 3, but more severe, with disruption of anterior larynx, unstable fractures, two or more fractures lines, or severe mucosa! Injuries. |
| Group 5 |
Complete laryngotracheal separation. |
|
