Spirometer is a device that performs spirometry which is a simple and most common lung function tests that are used to measure how much air can be moved into and out of the lungs. The lung function or pulmonary function tests are groups of tests that give an overall information about the breathing (inspiration and expiration) of the patient to detect diseases and obstruction
Papers:
Bellamy D, Booker R. Spirometry in practice: a practical guide to using spirometry in primary care. Cookham: Direct Pub. Solutions; 2000.
Tu J. Computational fluid and particle dynamics in the human respiratory system, Springer Science & Business Media, 2012.