1、 foreign body in trachea and bronchusSource：external、internalClassification of foreign body： plant：peanut、seeds. animal：fishbone、bone pieces mineral：iron nail synthetic product：dental prosthesis 90% cases5 years, 80% cases 3 yearscauses： poorly chew function, poorly pharyngeal reflex unconscious，asp
2、iration unhealthy habit: foreign body in mouth medical: Factors associated with clinic presentation foreign body sorts：peanut，chemical bronchitis Size: Shape: Stay time: Stay site Infection or not: presentation Inhaled period：cough，dyspnea Quiet period：no any symptom Infection period： cough，dyspnea,
3、 fever Complication period：atelectasis、emphysema、lung infectiondiagnosis：history of foreign body，dyspnea、cough，disorder sign in X-rayX-ray：obstructive emphysema obstructive atelectasis scan：three-dimensional rebuildtreatment： bronchoscopyForeign body in bronchusForeign body in bronchusForeign body in tracheaForeign body in tracheaForeign body in bronchusThanks
