Abstract: Objective To investigate the application status and quality control of pulmonary function testing in children in Guangdong Province.Methods A total of 71 hospitals applied for the construction of standardized asthma outpatient service between May 1,2020 and Nov. 30,2020, and they submitted reports on the pulmonary function testing items for children, whose quality control  was analyzed.Results Among the 71 hospitals,31(43.66%) were Grade Ⅲ Level A, and  40(56.33%) were not.There were 50（70.42%) in the Pearl River Delta，10(14.08%) in north Guangdong，7（9.86%） in west Guangdong and 4(5.63%) in east Guangdong. Among the equipment for pulmonary function testing, spirometer(100%) and tidal breathing pulmonary function instrument(63.83%) were the most common; in the non-Grade Ⅲ Level A hospitals there were fewer impulse oscillometers and exhaled nitric oxide equipment(P<0.05). Among the testing items, routine pulmonary ventilation detection and tidal pulmonary function determination were the most common. The rate of performing bronchodilation testing, impulse oscillometer and exhaled nitric oxide detection in the non-Grade Ⅲ Level A hospitals was lower than that in Grade Ⅲ Level A hospitals(P<0.05). Totally 322 reports on routine pulmonary ventilation were received, of which 148 were from the non-Grade Ⅲ Level A hospitals, 174 were not. There were 124(83.78%) first-class quality control reports from Grade Ⅲ Level A hospitals and 108(62.07%) from non-Grade Ⅲ hospitals, 6(4.06%) and 23(13.22%) second-class reports and 18(12.16%) and 41(23.57%) fifth-class reports, respectively.The proportion of first-class reports was higher in Grade Ⅲ hospitals than in non-Grade Ⅲ hospitals, while the proportion of second-class and fifth-class reports was lower(P<0.05).Conclusion  The application status of pulmonary function testing for children in Grade Ⅲ Level A hospitals of Guangdong Province is better than that in non-Grade Ⅲ hospitals: the instruments are better and there are more testing items. There is deference among different regions: the Pearl River Delta is better than the north, west and east Guangdong. As for quality control of reports, the Grade Ⅲ hospitals are better than the non-Grade Ⅲ hospitals. Therefore, the pulmonary function testing needs to be further popularized, and the clinical application and quality control of reports should be strengthened. Systemized and standardized training is required to enable pulmonary function testing to better serve clinical diagnosis and treatment.

Key words:

Pulmonnary function, Guangdong Province；Quality control, Investigation, Children