小儿呼吸道阻塞的诊断通常需结合病史和体格检查，而确诊往往需显微喉镜和支气管镜（MI，B），如果为胶外压迫，核磁共振检查是一有效的诊断方法。颈侧位和前后位X线照片在小地呼吸道阻塞诊断中是一个常用的简便方法，但对其在特殊气道异常疾病诊断中的准确性尚无评估报道。对1 Diagnosis of pediatric airway obstruction usually requires a combination of medical history and physical examination, and microlaryngoscopes and bronchoscopes (MI, B) are often required for diagnosis. MRI is an effective diagnostic method for external pressure oppression. The lateral and anteroposterior radiographs of the neck are a common and simple method for the diagnosis of small airway obstruction, but there is no assessment of their accuracy in the diagnosis of abnormal airway diseases. Right