The trachea and bronchial tree can be seen with an instrument called

The instrument is called fiber optic bronchoscope. It is the instrument that is used to examine the bronchial tree and to remove objects aspirated into air passages. The procedure is called bronchoscopy which allows the doctor to look at the airway through the instrument. During this procedure the doctor examines the throat, larynx, trachea, and lower airways. It also allows the doctor to remove small samples of tissue (biopsy).