The purpose is to prevent choking and aspiration during the operation. The purpose is to prevent choking and aspiration when the pharyngeal muscle is still under anesthesia during fiberoptic bronchoscopy. Bronchoscopy is safe and effective. Fiberoptic bronchoscopy is a common operation technique in respiratory medicine, so before the operation, you can understand its purpose and basic operation methods, so that you can prepare your mind to cooperate with the instructions and work of medical staff more effectively.