Obstructive sleep apnea hypoventilation syndrome To describe a person sleeping well, people tend to use “snoring like thunder”, thinking that the louder the snoring, the deeper the sleep. In fact, the loud snoring not only does not mean a good sleep, but also contains a great danger. Snoring is medically known as obstructive sleep apnea hypoventilation syndrome. Apnea refers to the cessation of airflow from the mouth and nose for more than 10 seconds during sleep, and hypoventilation refers to the reduction of respiratory airflow intensity by more than 50% compared with the basic level during sleep, accompanied by a 4% decrease in blood oxygen saturation compared with the previous one, and more than 30 repeated episodes of apnea and hypoventilation during each night of sleep (7 hours). Generally speaking, the causes of snoring, besides obesity, are tonsil hypertrophy, rhinitis, nasal polyps, and pharyngeal stenosis. In addition, the characteristics of jaw and facial bone structure of Asian yellow people make some people who are not obese can also snore. Typical patients with sleep apnea will have: snoring, recurrent respiratory arrest, breath-holding, and suffocation when sleeping. As a result of breath-holding during sleep, respiratory arrest causes secondary hypoxia, sleep structure disorder and causes memory loss, extreme daytime sleepiness, and may even fall asleep uncontrollably while driving or working. In addition, sleep apnea caused by snoring puts people in a long-term hypoxic state, and long-term hypoxia mainly harms the cardiovascular system, nervous system, endocrine metabolic system, blood system and kidney function of people. The most serious situation is that prolonged apnea at night can lead to respiratory arrest triggering myocardial infarction, sudden death and dementia. It has been proved that snoring is a source disease, which can induce cardiovascular diseases, sudden death, dementia, hypogonadism and other diseases, and has been listed as a high risk factor for human health, so it is called the invisible killer of sleep. Therefore, snoring should not be ignored. If you find any of the following special symptoms, please consult a doctor: sleep snoring, open-mouth breathing, frequent respiratory arrest or shallow and slow breathing, repeatedly waking up during sleep, sleep restlessness, induced epilepsy, sleeplessness, daytime sleepiness, drowsiness, increased blood pressure after waking up, etc. The treatment of snoring mainly includes the following methods: non-invasive positive pressure ventilation, wearing an oral orthosis, and surgery.