Abstract:Objective To observe the CT imaging features and pulmonary ventilation function in children with Mycoplasma pneumoniae pneumonia (MPP), and to analyze the correlation between them. Methods The clinical data of 100 children with MPP admitted to Jingxian Hospital from July 2019 to July 2021 were analyzed retrospectively. The children were divided into wheezing group (n=52) and non-wheezing group (n=48) according to wheezing symptoms/signs. The CT scores and pulmonary ventilation function of the two groups were compared, and the correlation between the CT imaging characteristics and the pulmonary ventilation function and CT scores of MPP children was analyzed. Results Among the 100 MPP children, CT examination showed that the distribution of lesions was mainly lobular-centered in 90 cases(90.00%), with few tree bud sign and lymphatic vessels, 49.00% of the lesions morphology were lumpy and flaky, 46.00% of lesion density was ground glass, and no cavity was found. The CT score of non-wheezing children was lower than that of wheezing children (3.82±0.52 vs 9.52±1.25, t=30.175, P<0.01). Compared with the wheezing group, the indexes forced vital capacity (FVC), forced expiratory volume in First second (FEV₁), FEV₁/FVC of MPP children in the non-wheezing group were higher (P<0.01). The bivariate Pearson linear correlation analysis showed that the CT score of MPP children was negatively correlated with FVC of pulmonary ventilation function (r=-0.286, P<0.01), FEV₁ of pulmonary ventilation function (r=-0.279, P<0.01), and FEV₁/FVC of pulmonary ventilation function (r=-0.312, P<0.01). Conclusion The CT scores are closely related to pulmonary ventilation function in children with MPP. CT examination can be carried out in time to evaluate the pulmonary ventilation function of children with MPP.