The following cases require emergency hyperbaric oxygen therapy: 1, acute carbon monoxide poisoning; 2, acute toxic gas poisoning; 3, cyanide poisoning, nitrite poisoning, etc.; 4, acute gas embolism, acute decompression sickness; 5, acute brain failure due to cardiopulmonary resuscitation, electric shock, drowning, self-hanging, asphyxiation, etc.; 6, plateau disease (brain type, lung type); 7, cerebral edema, pulmonary edema; 8, sudden deafness; 9, acute peripheral circulation disorder; 10, severe spinal cord injury.