How respiratory failure is caused

Respiratory failure mainly refers to human hypoxia or carbon dioxide retention, oxygen can not enter the lungs, or carbon dioxide can not be discharged out of the body, the main reason is acute respiratory failure, acute respiratory failure such as asphyxia, drowning caused by acute tracheal obstruction; chronic respiratory failure such as chronic obstructive pulmonary disease (asthma, emphysema, chronic obstructive pulmonary disease) caused by chronic tracheal obstruction.