Is it serious if the FVC of lung function is below 80

A lung function FVC below 80% indicates mild to moderate ventilation dysfunction, which needs to be evaluated comprehensively based on clinical symptoms and other indicators. The main influencing factors include chronic obstructive pulmonary disease, bronchial asthma, interstitial lung disease, thoracic deformities, and long-term smoking history.

1. Chronic obstructive pulmonary disease:

Chronic obstructive pulmonary disease is a common cause of decreased FVC, often accompanied by coughing, sputum production, and post activity shortness of breath. Early symptoms can be improved through bronchodilators, and moderate to severe patients require combined inhalation of corticosteroids. The lung function test showed that a decrease in the FEV1/FVC ratio is a key diagnostic indicator.

2. Bronchial asthma:

During acute attacks of bronchial asthma, there may be a temporary decrease in FVC, typically manifested as episodic wheezing and chest tightness. Standardized use of inhaled corticosteroids can effectively control symptoms, and peak flow velocity monitoring can help evaluate the level of disease control. Allergen avoidance and immunotherapy can reduce the frequency of attacks.

3. Interstitial lung disease:

Interstitial lung disease can lead to a decrease in lung compliance, manifested as progressive reduction of FVC with diffusion dysfunction. Patients often have dry cough and progressive dyspnea, and high-resolution CT can display characteristic interstitial changes in the lungs. Anti fibrotic drugs such as pirfenidone may delay disease progression.

4. Thoracic malformation:

Severe scoliosis or thoracic reconstruction surgery may limit lung expansion, resulting in a decrease in FVC values. These patients need to regularly monitor changes in lung function and engage in respiratory muscle exercises if necessary. Sleep breathing monitoring can evaluate whether there is concomitant nighttime hypoventilation.

5. Long term smoking history:

Smokers may experience a mild decrease in FVC, which is related to small airway inflammation and weakened lung elastic recoil. After quitting smoking, the rate of decline in lung function can be slowed down, and aerobic exercise can improve cardiovascular endurance. Regular lung function tests can help detect chronic airway diseases early. For patients with FVC consistently below 80%, it is recommended to complete blood gas analysis, chest imaging, and other examinations to clarify the cause. In daily life, one should avoid exposure to irritating gases, maintain moderate aerobic exercise such as brisk walking, swimming, etc., and pay attention to preventing respiratory infections. A balanced diet can include vegetables and fruits rich in antioxidants. Obese individuals need to control their weight to reduce respiratory load. If there is obvious worsening of shortness of breath or cyanosis of the lips, seek medical attention promptly.