How to do lung function examination, and what are the specific examination steps?

Need to go to a regular hospital for lung function examination.

Check steps:

1, tidal volume

Concept: the amount of air entering and leaving the lungs during calm breathing.

Clinical significance: The function of respiratory muscle is the main factor affecting tidal volume.

Reference value: about 500ml for adults.

2. Supplementary breathing volume (ERV) and supplementary inspiratory volume (IRV)

Concept: Expiratory volume is the maximum air volume that can be exhaled at the end of calm and forced expiration, and expiratory volume is the maximum air volume that can be inhaled after calm inhalation.

Clinical significance: When the functions of inspiratory and expiratory muscles are weakened, the expiratory volume and inspiratory volume decrease.

Reference value: expiratory volume: male 1603 492mL, female 1 126 338ml. Step 3 take a deep breath

Concept: the maximum amount of air that can be inhaled in order to calm the end of exhalation.

Clinical significance: The main factor affecting deep inspiratory ability is inspiratory muscle strength. Decreased thoracic and lung activity, increased elastic retraction force of lung tissue and airway obstruction can also reduce deep inhalation.

Reference values: male 26 17 548ml, female 1970 38 1ml.

Extended data:

Clinical significance

1, early detection of lung and respiratory diseases, such as chronic bronchitis, emphysema, bronchial asthma, interstitial lung disease, etc.

2. Determine the cause of dyspnea and the location of airway obstruction.

3. Assess the severity of lung diseases.

4. Evaluate the tolerance of surgery (especially chest surgery) and the possibility of postoperative complications.

People who smoke for a long time should also have regular lung function examination, observe the damaged lung function, and urge patients to make up their minds to quit smoking.

References:

Baidu encyclopedia-pulmonary function examination

References:

Baidu Encyclopedia-Lung Function Standard