The use of "oxygen hood" eliminates many shortcomings such as blockage and displacement, nasal infection, and application irritation that occur when nasal catheters, masks, nasal congestion and other devices are oxygenated, and it will not produce oxygen poisoning and promote skin when oxygen is given. Breathing improves brain hypoxia. Moreover, there is no respiratory resistance during oxygen delivery, easy to observe changes in the condition (such as cyanosis, etc.), and the oxygen concentration in the hood can be adjusted arbitrarily to meet the needs of various conditions. It is an essential device for hyperbaric oxygen. The hood is made of non-toxic organic glass, and the design is reasonable and easy to use. Extra large (a diameter of 350 mm is suitable for adults), large (a diameter of 240 mm is suitable for 4-year-old children), medium (a diameter of 200 mm is suitable for newborns to 4-year-old children), and small (a diameter of 160 mm is suitable for premature babies And newborns) four specifications, users can also choose flexibly according to the size of the patient's head and neck.