Two cases of acute carbon monoxide poisoning with delayed neurological sequelae after a "free" interval.

Two cases are presented to illustrate the delayed neurological complications which may follow carbon monoxide (CO) poisoning, the mechanisms of which are not well known and which do not seem to be recognized widely enough to safeguard patients. Broad discussion is needed to determine how cases of CO exposure/poisoning should best be handled if sequelae are to be avoided.