Abstract
It is a principle that the upper bronchoscopy should be used to remove the foreign bodies in the bronchus. However, lower bronchoscopy can be used in the following cases, that is, severe dyspnea, little confidence to remove with upper bronchoscopy, no sufficient instruments for removal, foreign body may be dropped off at the time passing through the glottis and so on. In cases of lower bronchoscopy, many problems will be occured concerning with the tracheotomy, especially attention should be paid to decannulation.
