Disorders of the lung was divided.
1. Restrictive or disorders that limit expansion means blowing up vital capacity (FVC) less than 80% of the lung capacity is expected to be blown up. The cause of lung ventilation is not good enough. Some muscle disease Or by blowing the wrong way. A breath before blowing up Or leaking out the side of the core, the wind blowing.
2. Obstructive airway obstructive disorders. Asthma is found in the Chronic bronchitis and emphysema caused by smoking. Or from blowing the wrong way. Such as blowing out soon and not strong enough.
3. Mixed disorder is found both in patients with disorders of bronchial obstruction lot.