2.1 Collection of clinical data
This study was approved by the ethics committee of The Children’s
Hospital of Zhejiang University School of Medicine, and all patients
were informed of the relevant research and provided their written
consent. A total of 194 children who were operated TFBA surgery in
The
Children’s Hospital of Zhejiang University School of Medicine from June
01, 2019 to April 30, 2020 was researched. The general characteristic,
clinical symptoms, operative records, cervicothoracic CT, type and
retention time of TFBA and weight were collected. The diagnosis of
cervicothoracic CT was made by two senior attending doctors in our
department according to clinical history. LRTI is defined as infection
and inflammation of trachea, main bronchus and lung bronchi. Imaging
basis includes preoperative cervicothoracic CT and intraoperative rigid
bronchoscopy10. Clinical diagnosis is based on
relevant clinical guidelines11,12.