Objective To explore the change of the lung function and sleep architecture of overlap syndrome patients undergoing home transnasal bi-level positive airway pressure(BiPAP)ventilation at night.

• 目的探讨连续长期家庭式夜间经鼻双水平气道正压(BiPAP)通气治疗对重叠综合征(OS)患者肺功能及睡眠结构的影响。