The role of pulmonary function test instruments

Lung function tester is a medical instrument, which measures the amount of gas in respiratory activity to assess lung function. It varies according to the performance, parameters and origin of lung function tester. Simple lung function tester only costs a few hundred to 5000 yuan. For example, the simplest peak current meter can only measure one index, only about two or three hundred yuan. imports ranged from 150000 yuan to 400000 yuan, depending on brand, model and price. The items examined included lung volume, ventilation function, maximum expiratory flow, diffusion function and bronchial reactivity.