A 46-year-old man with a history of obstructive sleep apnea, hypertension, and type 2 diabetes mellitus is referred to a sleep laboratory for evaluation. On arrival he is hooked up to an electroencephalograph (EEG) and be- gins to fall asleep a few minutes later. During the night the patient has multiple apneic episodes preceded by very loud snoring spells. At 3 o’clock in the morning the patient has beta waves on his EEG. This patient is currently in what stage of sleep?
一名有阻塞性睡眠呼吸暂停、高血压和 2 型糖尿病病史的 46 岁男性,被转诊至睡眠实验室进行评估。 到达后,他连接了脑电图仪 (EEG),几分钟后开始入睡。 在夜间,患者会出现多次呼吸暂停发作,并伴有非常响亮的打鼾。 凌晨 3 点,患者的脑电图中出现了 β 波。 这位患者目前处于睡眠的哪个阶段?
(A) Awake
(B) Stage 1
(C) Stage 2
(D) Stage 3
(E) Stage 4
答案解析:
当患者清醒并积极集中注意力时,可在 EEG 上看到 β 波。 当患者清醒且闭眼放松时,脑电图上会出现阿尔法波。
正确答案:A
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