Varius sized flexible bronchoscopes and retrieval instruments for foreign body removal. From top to bottom: 6 mm outer diameter (OD) bronchoscope with a 2.8 mm diameter working channel (WC); 4.9 mm OD bronchoscope with a 2.2 mm diameter WC; 3.5 mm OD bronchoscope with a 1.2 mm diameter WC; and 2.7 mm OD bronchoscope with a 1.2 mm diameter WC. A large variety of ancillary equipment, including forceps, grasping claws, and baskets, can be passed through these bronchoscopes to grip various foreign bodies.
