n.呼吸暂停；窒息
Obesity is a major risk factor for sleep apnea. 肥胖是呼吸暂停的主要危险因素。
Sleep apnea also increases the short-term risk of surgery. 睡眠呼吸暂停也增加了手术的风险。
Among patients with sleep apnea, it is best to use actigraphy to estimate total sleep time only when polysomnography is not aailable. 在睡眠窒息的患者中，当多导睡眠图无效时最好仅用腕动计来评估总的睡眠时间。
