Pulmonary function test checks the the function of lung capacity and lung and chest wall.The test measure lung volume, lung capacity, rates of flow to help in the diagnosis of lung disorders.
To determine the working efficiency of lungs and for the presence of obstructive and restrictive diseases
Spirometry which measures the amount of air you breathe in and out. Plethysmographytest measures the volume of gas or lung volume. Diffusion capacity test evaluates the working of alveoli sacks inside the lungs.