Pulmonary Function Testing Systems Market size was valued at USD 138.4 million in 2021. It is growing at a CAGR of 4.4% from 2022 to 2028 owing to an increase in the prevalence of respiratory diseases such as COPD, asthma, and other chronic lung diseases all over the world. Additionally, increasing consumption of tobacco products, increase in the air pollution, rising demand for minimally invasive tests for the treatment and diagnosis, increase in the awareness regarding the respiratory function testing systems, and advanced healthcare systems in developed countries are expected to enhance the sales of the market.