Pulmonary function tests are strictly prohibited for patients with chronic obstructive pulmonary disease who have combined pneumothorax, pulmonary embolism, impaired consciousness, and giant pulmonary herpes. Except for this special situation, patients with chronic obstructive pulmonary disease need to improve the lung function periodically.
1. The diagnosis of COPD can be confirmed when the value of one-second forced expiratory volume (FEV1)/forceful lung capacity (FVC) measured after inhalation of bronchodilators is ≤70%. The presence of airflow limitation in the patient is the gold standard for the diagnosis of COPD.
2. When COPD is combined with pneumothorax, giant pulmonary pustules, or pulmonary embolism, pulmonary function tests are not recommended to prevent exacerbation of the disease. When COPD is combined with impaired consciousness and other conditions, patients cannot cooperate with pulmonary function tests.
It is recommended that patients go to professional hospitals and choose appropriate tests under the guidance of doctors to make a clear diagnosis as soon as possible.