A spirometer is a simple medical device used to measure lung function by determining how much air a person can inhale and exhale. Spirometer testing, also called pulmonary function testing (PFT), is a common, painless test used by doctors to screen for and diagnose lung diseases as well as monitor how well lungs are working over time. https://www.coherentmarketinsights.com/market-insight/spirometer-market-2615