<unk> s are a category of extrapulmonary, pleural, or parenchymal respiratory diseases that restrict<unk>  expansion, resulting in a decreased<unk>  volume, an increased work of breathing, and inadequate ventilation and/or oxygenation. Pulmonary function test demonstrates a decrease in the forced vital capacity.
Restrictive lung disease
Obstructive lung disease
Alveolar lung disease
Reactive airway disease
Pulmonary heart disease
Interstitial lung disease
Asthma
Radiation-induced lung injury