Alveolar ventilation per minute is the effective ventilation. The amount of physiological dead space (VD) is subtracted from the tidal volume (VT) and multiplied by the respiratory rate. J. Take a breath when you check, then exhale at the leak of the instrument. The exhalation process should be uniform until the gas cannot be exhaled. After the data is obtained, the result is then calculated.

Basic Information

Specialist classification: Respiratory examination classification: pulmonary function test

Applicable gender: whether men and women apply fasting: not fasting

Tips: Eliminate tension and cooperate with the doctor to avoid affecting the test results. Normal value

5.5L/min.

Clinical significance

Abnormal results:

Refers to the effective ventilation of the alveolar gas that can reach the alveolar per minute in the basal metabolism.

Alveolar ventilation decreased, seen in chronic obstructive pulmonary disease, pneumonia, atelectasis, anesthesia, myasthenia gravis and other hypoventilation diseases, blood gas analysis showed type II respiratory failure and respiratory acidosis.

Alveolar ventilation increased, seen in ketoacidosis. Alveolar hyperventilation disease such as rickets, hyperventilation syndrome, blood gas analysis showed respiratory alkalosis.

The results of this test need to be comprehensively judged with other lung function tests.

Need to check the crowd:

Respiratory disorders, patients with pulmonary ventilation disorders.

Low results may be diseases: emphysema, obstructive emphysema, atelectasis

Requirements for inspection:

Eliminate tension and cooperate with the doctor to avoid affecting the test results.

Preparation before inspection:

Some drugs affect the test results. The doctor should be informed of the medication history before the examination.

Inspection process

Take a breath and breathe out against the leak of the instrument. The exhalation process should be uniform until the gas cannot be exhaled. After the data is obtained, the result is then calculated.

The amount of physiological dead space (VD) is subtracted from the tidal volume (VT) and multiplied by the respiratory rate.

Not suitable for the crowd

Not suitable for people:

Asylum patients need to consult a doctor before checking.

Adverse reactions and risks

Generally no complications and harm.