关键词: 儿童, 支气管哮喘, 肺功能

Abstract: The changes of lung function in children with bronchial asthma are characteristic，especially in the two aspects of airway hyperresponsiveness and obstructive lung dysfunction. The lung dysfunction is reversible，variable and diverse，which varies over the process of the disease. Lung function test plays an irreplaceable role in the diagnosis and management of asthma，but it does not correlate strongly with asthma symptoms in children. The changes of lung function caused by other respiratory diseases should be recognized for differential diagnosis. Only by correctly interpreting the results of lung function test and close combination with clinical expression can asthma in children be precisely diagnosed and managed.

Key words: child, bronchial asthma, lung function