The normal values and commonly used indexes of lung function are as follows: tidal volume refers to the amount of air entering and leaving each time when breathing calmly, and the normal value is 500ml. Supplementary inhalation refers to the maximum amount of air that can be inhaled after calm inhalation. Normal value, male 2000ml, female 1500ml. Residual volume refers to the residual volume that cannot be exhaled after expiratory supplement. The normal value is 1500ml for males and 1000ml for females. Deep inspiratory volume refers to the maximum amount of air that can be inhaled after calm exhalation, which is about 2600ml for men and 1600ml for women. Vital capacity is the maximum amount of air exhaled after the maximum inhalation, which is about 3500ml for men and 2500ml for women. Functional residual capacity refers to the volume contained in the lungs after calm exhalation. The normal value is about 2300ml for males and 1500ml for females. In addition, the main indexes of pulmonary ventilation function are: the ventilation volume per minute for men is about 6700ml, and that for women is about 4200ml. The normal values of alveolar ventilation, maximal voluntary ventilation per minute and ventilation reserve percentage are greater than 95%. One-second rate FEV 1/FVC, the normal value is greater than 70%.
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