Abstract:Objective To analyze the clinical data of 570 children underwent flexible bronchoscopy (FB) surgery to explore the value of FB surgery in the diagnosis and treatment of children's respiratory diseases.Methods The clinical data of 570 children who underwent FB examination and interventional therapy from January 2016 to December 2020 were retrospectively analyzed.Results Among 570 children, the disease composition in the comprehensive diagnosis after operation was: 433 cases (75.96%) of endobronchitis, 42 cases (7.37%) of tracheobronchial foreign bodies, 41 cases (7.19%) of laryngomalacia, 18 cases (3.16%) of plastic bronchitis, 7 cases (1.23%) with tracheal/bronchial softening, 6 cases (1.05%) with vocal cord paralysis, 3 cases (0.53%) with congenital tracheoesophageal fistula, 3 cases (0.53%) with subglottic stenosis, 3 cases (0.53%) of tracheal stenosis, 3 cases (0.53%) of tongue root cyst, 2 cases (0.35%) of subglottic hemangioma, 2 cases (0.35%) of primary ciliary dyskinesia, 2 cases (0.35%) of aspergillus fumigatus pneumonia, 1 case (0.18%) of epiglottic cyst, 1 case (0.18%) of glottis cyst, 1 case (0.18%) of laryngeal web, 1 case (0.18%) of X-linked chronic granulomatous disease, 1 case (0.18%) of atresia of posteriornaris. The main pathogens are Gram-positive bacteria, with Streptococcus pneumoniae accounting for the largest proportion.Conclusion FB examination greatly improves the diagnosis speed and accuracy rate of children's difficult and critical diseases, reduces misdiagnosis and missed diagnosis, combined with FB interventional therapy, it can treat the above diseases with minimally invasive, efficient and safe treatment, so it has important clinical value.