Sleep apnea and hypoventilation syndrome is a sleep disorder in which the number of episodes of apnea lasting more than 10 seconds is greater than 30 or the average number of sleep apnea + hypoventilation per hour is 5 during 7 hours of sleep per night. The incidence rate is about 2% – 5%, in recent years, clinically divided into obstructive type, central type, mixed type, with obstructive type is common, the clinical manifestations are diversified, mainly for sleep apnea accompanied by recurrent episodes of hypoxemia and hypercapnia, which can cause many systemic disorders, such as neurological, circulatory, endocrine, urinary system, sexual dysfunction, etc., and is often manifested as follows Daytime sleepiness, drowsiness, fatigue, headache, memory loss, mental depression, can be complicated by hypertension, angina pectoris, pulmonary arterial hypertension, and in severe cases, can lead to death during sleep.