Incentive Breathing Exerciser includes an inner bellows whose deflection allows accurate measurement of the initial volume of air inhaled by a patient and an outer bellows for measuring larger volumes of air after a valve in the inner bellows opens.

Spirometer is a device used by physician that assesses lung function. Spirometer is a most common pulmonary function tests. It determines how well the lungs receive, hold & utilize air. It is used to monitor a lung disease, effectiveness of treatment and to determine the severity of a lung disease.

Spirometry is the pulmonary function test, which measures the volume of air inspired or expired as a function of time. Spirometry is an important tool used for assessing conditions such as asthma and pulmonary fibrosis. Spirometry is a test that helps diagnose various lung conditions, most commonly chronic obstructive pulmonary disease. It is also used to monitor the severity of certain lung conditions. Spirometry provides an objective measurement of lung function.