1. What type of deafness and tinnitus can be treated by hyperbaric oxygen? Deafness can be divided into three types of deafness: conductive deafness (outer ear middle ear lesion), neurological deafness (inner ear lesion), and mixed deafness according to the lesion site. Hyperbaric oxygen has good therapeutic effect on neurological deafness, but has no therapeutic effect on conductive deafness. 2. Why is hyperbaric oxygen the main treatment for neurological deafness and tinnitus? Hyperbaric oxygen is the conventional means of treatment for tinnitus of neurological deafness with good efficacy. According to the literature, the efficiency of hyperbaric oxygen combined with drugs in the treatment of sudden deafness is 91.8%, and the efficiency of those who start treatment within 1 week after the onset of the disease is up to 97.3%. In contrast, the efficiency of drug treatment alone is only 67.2%. The efficiency of hyperbaric oxygen therapy for neurological tinnitus can also reach more than 80%. Therefore, patients with neurological deafness and tinnitus should actively undergo hyperbaric oxygen therapy. 3. Why can hyperbaric oxygen treat neurodeafness and tinnitus? Hyperbaric oxygen therapy can correct the local hypoxia of local nerve tissues caused by edema (local hypoxia is a difficult problem that cannot be solved under normal pressure) because the oxygen content and partial pressure of oxygen in the body increase significantly when pure oxygen is inhaled in a high-pressure environment. 4. Points to note for patients: (1) The sooner hyperbaric oxygen therapy is performed after the onset of the disease, the better the effect will be, and it should not be delayed. (2) Generally, 7-8 treatments are effective and 20-30 treatments are the most effective. Only a few patients are effective after a few treatments. Therefore, we should not be too hasty in our thinking. (3) Hyperbaric oxygen therapy should be accompanied by drug therapy. (4) Each time the chamber is pressurized, we should cooperate with the doctor to do a good job in regulating the pressure of the eustachian tube, such as chewing, swallowing, pinching the nose and puffing.