Sleep apnea hypoventilation syndrome refers to apnea caused by complete or partial obstruction of the upper airway or reduced central respiratory drive during sleep, resulting in chronic intermittent hypoxia, carbon dioxide retention, repeated increases in negative intrathoracic pressure, and can cause autonomic dysfunction, which mainly includes obstructive (OSAHS), central (CSAHS) and mixed types, with obstructive sleep apnea The most common type is obstructive sleep apnea hypoventilation syndrome (OSAHS), which is about 95%. OSAHS is the most common type of obstructive sleep apnea hypoventilation syndrome (OSAHS), with about 95% of the patients suffering from OSAHS. Due to the collapse and obstruction of the upper airway during sleep, OSAHS causes apnea, hypoventilation and decreased oxygen saturation, which can lead to hypertension, diabetes, developmental delay in children, memory loss, mental disorders, cardiac rhythm, etc. It can lead to hypertension, diabetes mellitus, developmental delay in children, memory loss, mental disorders, cardiac arrhythmia and even sudden death, and the change of body function can aggravate the symptoms of OSAHS. Foreign data show that the prevalence of OSAHS in adults is 2%-4%. The prevalence of OSAHS among adults in China is about 4%, and there are about 42.55 million patients with OSAHS, and the patient population is increasing and getting younger every year, which becomes a serious social health problem.