Clinical grading of central nervous system severity for acute carbon monoxide poisoning victims 30
| Grade | Symptoms |
|---|---|
| Grade 1 | oriented for time, place and person |
| headache, dizziness, nausea | |
| Grade 2 | disorientation for time, place or person |
| confusion or abnormal behaviour | |
| headache, nausea, dizziness | |
| Grade 3 | disorientation, loss of recent memory, muscle weakness or incoordination |
| if intubated: appropriate responses to simple commands | |
| Grade 4 | not intubated: inappropriate responses to simple commands |
| intubated: requiring sedation | |
| Grade 5 | comatose |
| responding only to pain | |
| not responding to any stimulus |