Table 1

Clinical grading of central nervous system severity for acute carbon monoxide poisoning victims 30

Grade 1oriented for time, place and person
headache, dizziness, nausea
Grade 2disorientation for time, place or person
confusion or abnormal behaviour
headache, nausea, dizziness
Grade 3disorientation, loss of recent memory, muscle weakness or incoordination
if intubated: appropriate responses to simple commands
Grade 4not intubated: inappropriate responses to simple commands
intubated: requiring sedation
Grade 5comatose
responding only to pain
not responding to any stimulus