Sleep apnea syndrome (SAS) includes obstructive sleep apnea syndrome(OSA), central sleep apnea syndrome(CSA). OSA is the most common, with an incidence man and woman of 4% and 2%, respectively. Major risk factors for OSA include obesity, male gender, increasing age and abnormal of craniofacial morphology. OSA as the most extreme variant is characterized by intermittent episodes of the up airway during sleep that disrupt normal ventilation and sleep architecture and is typically associated with snoring and d...