The purpose of this study is to access the clinical characteristics and risk factors for neurological sequelae after acute carbon monoxide poisoning.
patients present within 12 hours after acute carbon monoxide poisoning;
age older than 16 years.
pregnant women；
patients receive oxygen therapy before presentation;
have history of acute carbon monoxide poisoning within 1 year;
have been diagnosed any of the following disease: Parkinson disease; cognitive disorder, psychiatric disorders, sequelae of cerebral infarction or hemorrhage, chronic kidney disease and receive hemodialysis, congestive heart failure ( NYHA class III-IV)