Obstructive sleep apnea hypoventilation syndrome (OSAHS) is a sleep breathing disorder of unknown etiology, with clinical manifestations of nocturnal sleep snoring with apnea and daytime sleepiness. The recurrent episodes of nocturnal hypoxia and hypercapnia caused by apnea can lead to complications such as hypertension, coronary heart disease, diabetes and cerebrovascular disease, traffic accidents, and even sudden death at night. Therefore, OSAHS is a potentially lethal sleep breathing disorder. From the above introduction, it is easy to see that the disease seriously affects the quality of life of patients and even threatens their lives. Therefore, early identification of the disease and early active intervention and treatment can significantly reduce the associated risks. Common manifestations of OSAHS patients: 1. Snoring is the characteristic manifestation. This kind of snoring is different from simple snoring, the volume is high and very loud; the snoring is irregular and intermittent from time to time. 2.Deprivation or drowsiness during the day. 3. The heavier patients often have breath-holding at night, even sitting up suddenly, sweating profusely and feeling of near death. 4.Increased nocturnal urination, and individual patients develop enuresis. 5. Morning headache occurs. 6.Changes in personality, including irritability, intellectual and memory loss, and sexual dysfunction, etc. 7.Often combined with hypertension, coronary heart disease, diabetes and cerebrovascular disease.