What is the difference between measuring pulmonary function tests for children?

There are several differences between pulmonary function tests in children and adults.

Firstly, the methods of pulmonary function tests in children are more diverse. In addition to conventional pulmonary ventilation function tests, there are also tidal breathing tests, impulse oscillation tests, bronchial dilation tests, etc. Doctors choose different methods based on the age group and cooperation level of children to meet different examination needs.

Secondly, the indicators of pulmonary function tests in children are also different from adults. For example, the main indicators are peak expiratory flow rate (PEF), forced expiratory volume in 1 second (FEV1), time ratio of peak expiratory flow to total expiratory time (TPTEF/TE), volume ratio of peak expiratory flow to total expiratory volume (VPEF/VE), and the shape of flow-volume loop, which can reflect the airway obstruction in children with asthma.

Finally, the interpretation of pulmonary function test results in children is also different from adults. For example, bronchial provocation test: there is no increase in airway responsiveness. Bronchodilator response test: if the improvement rate of FEV1 after drug administration is less than 12%, it is considered as a negative response.

In general, pulmonary function tests in children differ from adults in terms of methods and indicators. It is necessary to choose appropriate methods and indicators based on children's age and cooperation level for testing to accurately assess their pulmonary function status.