Gas poisoning belongs to carbon monoxide poisoning, and the sequelae are as follows: 1. mainly there will be neurological and psychiatric sequelae, patients will have poisoning, delayed encephalopathy, dizziness, headache, confusion, impaired consciousness, impaired reactivity, disorientation, impaired or insensitive pain, warmth, touch. 2. there will also be symptoms of impaired and impaired calculation, recognition, disorientation, etc. 3. at the same time Patients will also have varying degrees of cone system and extrapyramidal dysfunction, such as unstable walking and intermittent claudication.4. For patients with a previous history of coronary heart disease, if they develop gas poisoning, they will also have varying degrees of chest tightness, shortness of breath, arrhythmia, arrhythmia and other sequelae.