Hypoxemia

Hypoxemia refers to the lack of oxygen in the blood, and the arterial oxygen partial pressure (pao2) is lower than the normal lower limit of the same age, which is mainly manifested by the decrease in partial oxygen pressure and blood oxygen saturation. Adult normal arterial blood oxygen pressure (PaO2): 83-108mmHg. Hypoxia can be caused by various reasons such as central nervous system disorders, bronchial and lung lesions and other ventilation and / or ventilation dysfunction. Due to different degrees of hypoxemia, the rate and duration of occurrence, the effects on the body are also different. Hypoxemia is one of the common critical illnesses in the respiratory department and one of the important clinical manifestations of respiratory failure.