Lung volumes and Capacites

Restrictive lung disease is a chronic disorder that causes a decrease in the ability to expand the lung (breathe in)

Obstructive lung disease is a category of respiratory disease characterized by airway obstruction (Breathe out)

Hallmark of restrictive lung diseases is decrease in lung volumes primarily Total lung capacity and vital capacity.

Hallmark of obstructive lung disease is decrease in expiratory flow rates(FEF 25-75) decrease in FEV1/FVC.