It is characterized by repeated snoring, apnea, and hypopnea during sleep, leading to repeated arterial oxygen desaturations and hypercapnia.

• 主要表现为睡眠时打鼾并伴有呼吸暂停和低通气，夜间反复发生低氧血症、高碳酸血症和睡眠结构紊乱，导致白天嗜睡、工作效率降低。