Bronchoscopies:
FB were extracted using rigid Hopkins bronchoscope (Storz, 2.9 mm 37 cm) or rigid ventilating bronchoscope or flexible bronchoscope (Olympus, external diameter of 3.6 mm, working channel of 1.2 mm) with the insertion of retrieval basket or grasping forceps, depend of the nature and location of the foreign body. All the bronchoscopies were performed in the OR, with a multidisciplinary team that included anesthesiology specialist, ENT specialist and pediatric pulmonologist. Most patients were deeply sedated, and were on oxygen supplement by reservoir mask. The data about the procedures were taken from the OR reports. We excluded the reports, where flexible and rigid bronchoscopy were done in combination, those that the FB was in the gastrointestinal system and those that FB was not found during the procedure.