Oxygen consumables are single-use accessories for medical oxygen delivery systems, including nasal cannulas (pronged tubing for 1-6 L/min low-flow), simple face masks (5-10 L/min 35-60% FiO2), non-rebreather masks (>90% FiO2 with reservoir), Venturi masks (precise 24-60% FiO2), bubble humidifier bottles (sterile water humidification prevents dry airways), oxygen tubing (crush-resistant 7-50 ft lengths), high-flow nasal cannulas (HFNC 20-60 L/min), and disposable filters/traps (remove bacteria/humidity). Used with concentrators, cylinders, or ventilators; change daily to prevent infection.