During the procedure, your doctor passes a thin, flexible tube called a bronchoscope through your nose (or sometimes your mouth), down your throat, and into the airways. If you have a breathing tube, the bronchoscope can be passed through it to your airways. | During the procedure, your doctor passes a thin, flexible tube called a bronchoscope through your nose (or sometimes your mouth), down your throat, and into the airways. If you have a breathing tube, the bronchoscope can be passed through it to your airways. |