kopsutorude otsene vaatlus suu või nina kaudu sinna juhitava bronhoskoobi abil, kopsutorusisene uuring valgusallikaga varustatud instrumendi (bronhoskoobi) abil, the examination of the bronchial tree with a bronchoscope, inspection of the interior of the tracheobronchial tree through a bronchoscope, usually a fiberoptic one passed through the nose, endoscopie des bronches à l'aide d'un bronchoscope