Chronic respiratory failure

Chronic respiratory failure occurs on the basis of the original lung diseases, such as chronic obstructive pulmonary disease, severe tuberculosis, pulmonary interstitial fibrosis, pneumoconiosis, thorax disease and chest surgery, trauma, extensive pleural thickening, and chest deformity The most common cause is COPD, which can manifest as type Ⅰ respiratory failure at an early stage. As the disease gradually worsens, lung function becomes worse and worse, and can manifest as type Ⅱ respiratory failure. In the stable phase of chronic respiratory failure, although PaO2 decreases and PaCO2 increases, patients can stabilize within a certain range through compensation and treatment, and patients can still engage in general work or daily activities. Once due to the exacerbation of respiratory infections or other causes, it can be manifested as a significant decrease in PaO2 and a significant increase in PaCO2. At this time, it can be called an acute episode of chronic respiratory failure, which is the most common type of chronic respiratory failure in China.

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